Data Quality Report for Order ID: 187133
User ID: lih3    Date completed: 2017-08-08
All DQRs
DQR ID Subject Affected Data Streams Data Quality Metric
D961122.13 SGP/EBBR/E26 - Right Air Temperature Malfunction sgp30ebbrE26.b1 Incorrect
D000225.1 SGP/EBBR/26 - Low Battery Condition sgp5ebbrE26.b1 Suspect
D960104.8 SGP/EBBR/E26 - Right Tair Offscale sgp30ebbrE26.b1 Incorrect
D030128.2 SGP/EBBR/E26 - AEM Hung sgp5ebbrE26.b1 Incorrect
D990622.7 SGP/EBBR/E26 - Battery Wire Problem Causes Questionable Data sgp5ebbrE26.b1 Suspect
D000301.9 SGP/EBBR/E26 - Net Radiation Incorrect sgp5ebbrE26.b1 Incorrect
D011206.1 SGP EBBR E26 - Low Battery Voltage sgp30ebbrE26.b1 Suspect
D941021.11 SGP/EBBR/E26 - Net Radiometer Hemisphere Changes sgp5ebbrE26.b1 Suspect
D000623.2 SGP/EBBR/E26 - All Data Incorrect sgp30ebbrE26.b1 Incorrect
D020716.18 SGP/EBBR/E26 - 6 Month Checks sgp30ebbrE26.b1 Incorrect
D961122.28 SGP/EBBR/E26 - EBBR 3 Month Checks - 10 EFs sgp5ebbrE26.b1 Incorrect
D021113.1 SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header sgp30ebbrE9.b1 Note
D000627.7 SGP/EBBR/E26 - Soil Heat Flow #1 Incorrect sgp30ebbrE26.b1 Incorrect
D990129.5 SGP/EBBR/E26 - Battery Voltage Low sgp5ebbrE26.b1 Incorrect
D030711.6 SGP/EBBR/E26 -Right Air Temperature Incorrect sgp5ebbrE26.b1 Incorrect
D000623.8 SGP/EBBR/E26 - All Data Incorrect sgp5ebbrE26.b1 Incorrect
D980117.33 SGP/EBBR/E26 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected sgp30ebbrE26.b1 Incorrect
D010605.25 SGP EBBR E26 - Soil Heat Flow #3 Incorrect sgp30ebbrE26.b1 Incorrect
D950626.10 SGP/EBBR/E26 - Stopped Ventilation Fan sgp30ebbrE26.b1 Incorrect
D010605.23 SGP EBBR E26 - Soil Heat Flow #1 Incorrect sgp30ebbrE26.b1 Incorrect
D020724.48 SGP/EBBR/E26 - Annual Calibration Changeout sgp30ebbrE26.b1 Incorrect
D011206.2 SGP EBBR E26 - Battery Voltage Low sgp30ebbrE26.b1 Suspect
D031222.24 SGP/EBBR/E26 - Wind Speed Sensor Frozen By Ice Storm sgp30ebbrE26.b1 Incorrect
D951116.3 SGP/EBBR/E26 - Wind Speed Cups Frozen sgp30ebbrE26.b1 Incorrect
D030728.4 SGP/EBBR/E26 - Soil Heat Flow #5 Large Positive sgp30ebbrE26.b1 Incorrect
D000627.11 SGP/EBBR/E26 - Reference Temperature Incorrect sgp30ebbrE26.b1 Incorrect
D980507.5 SGP/EBBR/E26 - Character In EBBR E26, 30 Minute Data sgp30ebbrE26.b1 Incorrect
D990622.6 SGP/EBBR/E26 - Battery Wire Problem Causes Incorrect Data sgp5ebbrE26.b1 Incorrect
D010605.20 SGP EBBR E26 - Data Suspect, Low Battery Voltage sgp30ebbrE26.b1 Suspect
D050719.15 SGP/EBBR/E26 - Improved EBBR CR10 Program sgp30ebbrE26.b1 Note
D990409.6 SGP/EBBR/E26 - Calibration Changeout sgp30ebbrE26.b1 Missing
D010605.22 SGP EBBR E26 - All Data Incorrect sgp30ebbrE26.b1 Incorrect
D011127.34 SGP EBBR E26 - Data Incorrect During 6 Month Checks sgp30ebbrE26.b1 Incorrect
D000221.3 SGP/EBBR/E26 - Right Aspirator Not Working sgp30ebbrE26.b1 Incorrect
D031222.25 SGP/EBBR/E26 - Wind Direction Sensor Frozen By Ice Storm sgp30ebbrE26.b1 Incorrect
D000221.7 SGP/EBBR/E26 - Anemometer Not Working, Wind Speed Incorrect sgp15ebbrE26.b1 Incorrect
D020628.6 SGP/EBBR/E26 - 3-month Check sgp5ebbrE26.b1 Incorrect
D000623.3 SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data sgp30ebbrE26.b1 Incorrect
D980416.18 SGP/EBBR/E26 - 3-Month Check sgp5ebbrE26.b1 Incorrect
D030128.4 SGP/EBBR/E26 - Left Air Temperature Incorrect sgp30ebbrE26.b1 Incorrect
D941221.1 SGP/EBBR/E26 - T/RH Check sgp30ebbrE26.b1 Incorrect
D951016.2 SGP/EBBR/E26 - Net Radiometer Dome Punctured sgp30ebbrE26.b1 Incorrect
D980529.17 SGP/EBBR/E26 - Six Month Checks sgp30ebbrE26.b1 Incorrect
D950921.4 SGP/EBBR/E26 - AEM replacement sgp30ebbrE26.b1 Incorrect
D030117.26 SGP/EBBR/E26 - Measurements zero following logger restart sgp30ebbrE26.b1 Incorrect
D990127.31 SGP/EBBR/E26 - Wind Direction Data Incorrect sgp5ebbrE26.b1 Incorrect
D050324.3 SGP/EBBR/E26 - Incorrect soil type coefficients used sgp30ebbrE26.b1 Incorrect
D950626.14 SGP/EBBR/E26 - Reprocess: Soil Heat Flow Sensor 1 Replacement sgp30ebbrE26.b1 Incorrect
D961122.4 SGP/EBBR/E26 - Annual Calibration Changeout sgp30ebbrE26.b1 Missing
D941212.1 SGP/EBBR/E26 - Wind Direction Sensor Affect on Soil Moisture 2 sgp30ebbrE26.b1 Incorrect
D030514.8 SGP/EBBR/E26 - E26 EBBR Soil Heat Flow #1 Incorrect sgp30ebbrE26.b1 Incorrect
D000627.4 SGP/EBBR/E26 - Electronics Problem sgp30ebbrE26.b1 Incorrect
D030117.29 SGP/EBBR/E26 - Battery Voltage Low sgp30ebbrE26.b1 Incorrect
D950626.19 SGP/EBBR/E26 - Right Air Temperature Malfunction sgp5ebbrE26.b1 Incorrect
D950626.5 SGP/EBBR/E26 - Frozen Wind Speed Sensor sgp5ebbrE26.b1 Incorrect
D960409.1 SGP/EBBR/E26 - Right Air Temperature Malfunction sgp30ebbrE26.b1 Incorrect
D000623.7 SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data sgp30ebbrE26.b1 Incorrect
D010723.5 SGP EBBR E26 - Soil Heat Flow #5 Incorrect sgp30ebbrE26.b1 Incorrect
D961122.12 SGP/EBBR/E26 - Wind Direction Sensor Failure sgp30ebbrE26.b1 Incorrect
D000623.9 SGP/EBBR/E26 - All Data Incorrect sgp30ebbrE26.b1 Incorrect
D961122.5 SGP/EBBR/E26 - Wind Direction Sensor Failure sgp30ebbrE26.b1 Incorrect
D980117.5 SGP/EBBR/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) sgp30ebbrE26.b1 Incorrect
D021113.4 SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header sgp30ebbrE13.b1 Note
D960501.4 SGP/EBBR/E26 - Right Air Temp Malfunction sgp30ebbrE26.b1 Incorrect
D030128.3 SGP/EBBR/E26 - Data zeros following logger restart sgp30ebbrE26.b1 Incorrect
D030117.28 SGP/EBBR/E26 - Water in broken Net Radiometer Dome sgp30ebbrE26.b1 Incorrect
D051112.9 SGP/EBBR/E26 - metadata corrections sgp30ebbrE26.b1 Note
D010723.8 SGP EBBR E26 - Some Data Incorrect sgp30ebbrE26.b1 Incorrect
D960104.2 SGP/EBBR/E26 - Wind Speed Cups Frozen sgp5ebbrE26.b1 Incorrect
D970627.2 SGP/EBBR/E26 - Reprocess: E26 Soil Heat Flow Sensor 1 Replacement sgp30ebbrE26.b1 Incorrect
D951016.1 SGP/EBBR/E26 - Battery Voltage Drop sgp5ebbrE26.b1 Incorrect
D000623.6 SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data sgp30ebbrE26.b1 Incorrect
D971021.9 SGP/EBBR/E26 - EBBR Biannual Checks sgp30ebbrE26.b1 Incorrect
D000623.5 SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data sgp30ebbrE26.b1 Incorrect
D000627.9 SGP/EBBR/E26 - Left Air Temperature Incorrect sgp30ebbrE26.b1 Incorrect
D031103.1 SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect sgp30ebbrE26.b1 Incorrect
D990127.7 SGP/EBBR/E26 - Battery Voltage Low, Data Incorrect sgp30ebbrE26.b1 Incorrect
D960508.10 SGP/EBBR/E26 - 3-month check sgp30ebbrE26.b1 Incorrect
D000623.1 SGP/EBBR/E26 - EBBR E26 Left Aspirator Not Working sgp30ebbrE26.b1 Suspect
D000627.10 SGP/EBBR/E26 - Left Air Temperature Periodically Incorrect sgp5ebbrE26.b1 Suspect
D031211.3 SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect sgp30ebbrE26.b1 Incorrect
D031204.21 SGP/EBBR/E26 - 6 Month Checks sgp30ebbrE26.b1 Incorrect
D020717.39 SGP/EBBR/E26 - Multiplexer 2 Failure From High Temperature sgp30ebbrE26.b1 Suspect
D950308.3 SGP/EBBR/E26 - Frozen Wind Speed Sensor sgp30ebbrE26.b1 Incorrect
D950908.2 SGP/EBBR/E26 - AEM not exchanging sgp5ebbrE26.b1 Incorrect
D950626.9 SGP/EBBR/E26 - Frozen Wind Speed Sensor sgp30ebbrE26.b1 Incorrect
D010723.3 SGP EBBR E26 - Soil Moisture #1 Incorrect sgp30ebbrE26.b1 Incorrect
D940606.1 SGP/EBBR/E26 - Wind Speed Malfunction sgp30ebbrE26.b1 Incorrect
D940818.1 SGP/EBBR/E26 - Soil Moisture Sensor Malfunction sgp30ebbrE26.b1 Incorrect
D010723.4 SGP EBBR E26 - AEM Inbetween, Data Incorrect sgp5ebbrE26.b1 Incorrect
D000627.8 SGP/EBBR/E26 - Soil Heat Flow #2 Large Negative sgp30ebbrE26.b1 Incorrect
D940329.1 SGP/EBBR/E26 - Wind Direction Sensor Malfunction sgp30ebbrE26.b1 Incorrect
D960119.3 SGP/EBBR/E26 - Right tair Offscale sgp30ebbrE26.b1 Incorrect
D940606.2 SGP/EBBR/E26 - Wind Direction Sensor Failure sgp30ebbrE26.b1 Incorrect
D000623.11 SGP/EBBR/E26 - All Data Incorrect sgp30ebbrE26.b1 Incorrect
D041222.1 SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect sgp30ebbrE26.b1 Incorrect
D970330.6 SGP/EBBR/E26 - Wind Direction Sensor Failure sgp5ebbrE26.b1 Incorrect
D000623.10 SGP/EBBR/E26 - EBBR E26 All Data Incorrect sgp30ebbrE26.b1 Incorrect
D010213.12 SGP/EBBR/E26 - Wind Speed Iced sgp15ebbrE26.b1 Incorrect
D030919.11 SGP/EBBR/E26 - Soil Storage Incorrect; Surface Fluxes Incorrect sgp30ebbrE26.b1 Incorrect
D020717.38 SGP/EBBR/E26 - Measurements Incorrect sgp30ebbrE26.b1 Incorrect
D951113.4 SGP/EBBR/E26 - Right Tair Offscale sgp30ebbrE26.b1 Incorrect
D020717.37 SGP/EBBR/E26 - Measurements Zero sgp30ebbrE26.b1 Incorrect
D000210.1 SGP/EBBR/E26 - Temperature from Left T/RH Probe Incorrect sgp30ebbrE26.b1 Incorrect
D971027.9 SGP/EBBR/E26 - Bad Dates sgp30ebbrE26.b1 Incorrect
D010605.24 SGP EBBR E26 - Soil Heat Flow #2 Incorrect sgp30ebbrE26.b1 Incorrect
D940211.1 SGP/EBBR/E26 - Invalid data during Preventative Maintenance sgp30ebbrE26.b1 Incorrect
D990127.42 SGP/EBBR/E26 - Wind Speed Data Incorrect sgp15ebbrE26.b1 Incorrect
D000211.13 SGP/EBBR/E26 - Left T/RH Probe Temperature Data Incorrect sgp30ebbrE26.b1 Incorrect
D980117.22 SGP/EBBR/E26- EBBR Frozen Wind Speed sgp30ebbrE26.b1 Incorrect
D000627.6 SGP/EBBR/E26 - Soil Heat Flow #5 Incorrect sgp30ebbrE26.b1 Incorrect
D030117.27 SGP/EBBR/E26 - Multiplexer Problem sgp30ebbrE26.b1 Incorrect
D990421.2 SGP/EBBR/E26 - Incorrect Data sgp5ebbrE26.b1 Incorrect
D000622.1 SGP/EBBR/E26 - Reprocess: Soil Moisture Off-Scale sgp30ebbrE26.b1 Suspect
D030712.23 SGP/EBBR/E26 - 6 Month Checks sgp30ebbrE26.b1 Incorrect
D940301.2 SGP/EBBR/E26 - Winds, SM2 Invalid data 10/10/93 - 2/2/94 sgp30ebbrE26.b1 Incorrect
D010723.7 SGP EBBR E26 - Some Data Incorrect sgp30ebbrE26.b1 Incorrect
D990127.43 SGP/EBBR - EBBR E26 Wind Speed Data Incorrect sgp30ebbrE26.b1 Suspect
D030110.27 SGP/EBBR/E26 - Data Incorrect during 6 month checks sgp30ebbrE26.b1 Incorrect
 
DQR ID: D961122.13    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-05-12 00:00:00 1996-07-05 23:59:00 Incorrect
Subject: SGP/EBBR/E26 - Right Air Temperature Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description The right air temperature probe malfunctioned again and produced incorrect data (outside of range) during some of the period indicated above. The cause of the problem is unknown. On 18 June site operations tightened the connection to the J-panel and repaired a broken aspirator fan wire. However, incorrect data resumed shortly after site operations left the site. Data continued to be incorrect during some times through July 5. No incorrect data was recorded from July 6 through July 17. The EBBR unit was changed out on July 17, 1996. The times of incorrect right air temperatures are easy to recognize from the EBBR data, so the precise times of incorrect data are not enumerated here. Typically, the top and bottom air temperature is out of range, resulting in the sensible heat flux being zero. The malfunction of the right air temperature probe results in incorrect Bowen ratio, sensible heat flux, and latent heat flux. The data values that are affected are: 5 minute: tair_top, tair_bot 15 minute: tair_r 30 minute: tair_top, tair_bot, bowen, e, and h
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D000225.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-07-27 06:15:00 1999-08-12 16:00:00 Suspect
Subject: SGP/EBBR/26 - Low Battery Condition
Affected Datastreams: sgp5ebbrE26.b1
Description When battery voltage was less than 10.4 V DC during this period, all data should be considered to be incorrect. The cause of the problem was a broken trace on J-panel #3.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • time_offset (Time offset from base_time)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • lon (East longitude)
  • soil_temp_3 (Soil temperature 3)
  • soil_temp_4 (Soil temperature 4)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D960104.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-12-26 16:30:00 1995-12-31 19:30:00 Incorrect
Subject: SGP/EBBR/E26 - Right Tair Offscale
Affected Datastreams: sgp30ebbrE26.b1
Description On 26 and 31 December 1995 at E26, Cement, OK EBBR the right thermocouple output went offscale. The cause for this is unknown and the sensor recovered fully. Five minute data would need to be inspected during the periods above for incorrect five minute values. Site Operations has been asked to check the sensor connections. Incorrect data for the period indicated includes: 5 minute: tair_top, tair_bot 15 minute: tair_r 30 minute: tair_top, tair_bot, bowen, h, e
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D030128.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-12-04 10:15:00 2003-01-10 16:00:00 Incorrect
Subject: SGP/EBBR/E26 - AEM Hung
Affected Datastreams: sgp5ebbrE26.b1
Description The AEM hung inbetween home positions during the period. The Bowen ratio, gradient measurements, sensible heat flux, and latent heat flux are incorrect.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D990622.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-04-28 22:45:00 1999-04-29 06:00:00 Suspect
Subject: SGP/EBBR/E26 - Battery Wire Problem Causes Questionable Data
Affected Datastreams: sgp5ebbrE26.b1
Description The battery voltage dropped to less than 10.4 volts, causing all data to be suspect for the time period.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • time_offset (Time offset from base_time)
  • soil_temp_2 (Soil temperature 2)
  • lon (East longitude)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D000301.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-09-25 07:00:00 1999-10-07 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - Net Radiation Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description The net radiometer top dome was broken and water had entered. Net radiation values are therefore incorrect during the period. The affected data are: 5 minute: q 15 minute: mv_q 30 minute: q, h, e
Measurements
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • net_radiation (Net radiation)
 
DQR ID: D011206.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-09-14 11:30:00 2001-03-31 23:56:00 Suspect
Subject: SGP EBBR E26 - Low Battery Voltage
Affected Datastreams: sgp30ebbrE26.b1
Description During the indicated the period the battery voltage often dropped to 10.4 volts or below. At voltages less than 10.5 volts none of the selected measurements can be considered to be correct. The battery charging capacity was insufficient to maintain voltage at night. If the battery voltage is less than 10.5 volts (see battery voltage in the 15 minute data files), do not use the data.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • net_radiation (Net radiation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_2 (Soil temperature 2)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D941021.11    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-09-14 16:00:00 1994-09-28 15:15:00 Suspect
Subject: SGP/EBBR/E26 - Net Radiometer Hemisphere Changes
Affected Datastreams: sgp5ebbrE26.b1
Description The upper hemisphere of the net radiometer at the site was punctured allowing water to collect in the lower (and sometimes upper) section of the sensor. The punctures are most likely the result of migratory birds (a problem that we have experienced almost every year here at ANL also). The punctures (and water in some net radiometers) did not result in obvious invalidation of the data. Whether there is water in the lower hemisphere or not, a small puncture of the upper hemisphere would not have a major effect on the net radiation measurement. Significant amounts of water in the lower hemisphere should have a major effect on nighttime measurements particularly, although that effect is hard to detect in the data. The date when the puncture occurred is approximate - but is certainly no more than two weeks before the hemisphere was replaced.
Measurements
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • net_radiation (Net radiation)
 
DQR ID: D000623.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-06 16:30:00 2000-04-06 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - All Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Data was incorrect because of Preventative Maintenance activities.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D020716.18    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-05-02 15:00:00 2002-05-02 15:31:00 Incorrect
Subject: SGP/EBBR/E26 - 6 Month Checks
Affected Datastreams: sgp30ebbrE26.b1
Description The indicated measurements were incorrect during the 6 month checks.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D961122.28    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-10-24 15:50:00 1996-10-24 16:13:00 Incorrect
Subject: SGP/EBBR/E26 - EBBR 3 Month Checks - 10 EFs
Affected Datastreams: sgp5ebbrE26.b1
Description During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D021113.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2001-04-01 00:00:00 2003-06-18 23:59:00 Note
Subject: SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header
Affected Datastreams: sgp30ebbrE9.b1
Description The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the EBBR 30 minute netcdf header have been incorrect from the beginning of processing the data into netcdf files. The correct units are MJ/m^3/C. This does not affect the data quality.
Measurements
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_capacity_1 (Soil heat capacity 1)
 
DQR ID: D000627.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-12-16 00:30:00 2000-03-07 14:55:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Heat Flow #1 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #1 was incorrect, causing the indicated measurements to be incorrect. A broken sensor wire was at fault.
Measurements
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D990129.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1998-12-30 03:00:00 1998-12-30 13:00:00 Incorrect
Subject: SGP/EBBR/E26 - Battery Voltage Low
Affected Datastreams: sgp5ebbrE26.b1
Description Battery voltage dropped below 10.4 volts. All data should be considered to be incorrect.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • time_offset (Time offset from base_time)
  • soil_temp_2 (Soil temperature 2)
  • lon (East longitude)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D030711.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-01-24 16:35:00 2003-03-06 15:20:00 Incorrect
Subject: SGP/EBBR/E26 -Right Air Temperature Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description One of the Right Air Temperature connections was loose, producing incorrect data.
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D000623.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-24 00:00:00 2000-03-24 00:30:00 Incorrect
Subject: SGP/EBBR/E26 - All Data Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description All data was incorrect for an unknown reason.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D980117.33    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1997-12-16 20:00:00 1997-12-29 18:40:00 Incorrect
Subject: SGP/EBBR/E26 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected
Affected Datastreams: sgp30ebbrE26.b1
Description The upper dome of the EBBR net radiometers was punctured. After the puncture, water collected in the top and/or bottom dome. The water was removed and the dome was replaced during PM visits. In some cases, the puncture and water resulted in incorrect data. Comparison with net radiation values from surrounding EBBR sites and the SIRS is neccesary to determine if the EBBR net radiation data are correct or incorrect. It is often difficult to tell from the data when the punctures occurred, but they would have existed for no more than 2 weeks, since the domes are checked during each two-weekly PM visit. Incorrect net radiation data results in the latent heat flux and sensible heat flux also being incorrect.
Measurements
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • net_radiation (Net radiation)
 
DQR ID: D010605.25    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-12-14 16:00:00 2000-12-16 03:01:00 Incorrect
2000-06-15 15:00:00 2000-06-19 22:01:00 Incorrect
2000-11-30 16:00:00 2000-12-03 07:31:00 Incorrect
2000-11-05 19:00:00 2000-11-16 16:01:00 Incorrect
Subject: SGP EBBR E26 - Soil Heat Flow #3 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil heat Flow #3 was incorrect (large negative). Therefore average soil heat flow, sensible heat flux, and latent heat flux were also incorrect; these can be re-calculated using the remaining correct soil heat flows.
Measurements
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D950626.10    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-04-11 12:30:00 1995-04-12 06:15:00 Incorrect
1995-04-12 13:15:00 1995-04-12 14:00:00 Incorrect
Subject: SGP/EBBR/E26 - Stopped Ventilation Fan
Affected Datastreams: sgp30ebbrE26.b1
Description On April 11, 1995, a site operator discovered the right aspirator ventilation fan of the EBBR to be stopped. Inspection of the data indicates that this condition occurred during the two periods shown above; the fan apparently worked briefly inbetween the periods. Lack of ventilation of the temperature and relative humidity sensors attached to the AEM results in incorrect measurements of air temperature and relative humidity by the right aspirator probes, and therefore all quantities calculated from them, including sensible and latent heat fluxes, are incorrect as well. The quantities that are incorrect for the periods indicated are: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, and vp_bot 15 minute: rr_thum_r, mv_hum_r, tair_r 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, bowen, e, h
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D010605.23    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-12-16 17:00:00 2000-03-03 09:31:00 Incorrect
Subject: SGP EBBR E26 - Soil Heat Flow #1 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #1 was incorrect because of a bad electronic connection. Average surface heat flow, sensible heat flux, and latent heat flux are incorrect as a result; these can be re-calculated by using the remaining correct soil heat flows.
Measurements
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D020724.48    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-07-17 14:00:00 1996-07-17 14:30:00 Incorrect
Subject: SGP/EBBR/E26 - Annual Calibration Changeout
Affected Datastreams: sgp30ebbrE26.b1
Description On 16 November 1996 the EBBR changeout for annual calibration occurred at E26, Cement, OK. SEBS unit 2 was removed and unit 8 was installed. Data for half hours 1400 and 1430 GMT on 17 November is incorrect; 3 month calibration checks were being performed.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • time_offset (Time offset from base_time)
  • lon (East longitude)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • lat (North latitude)
  • alt (Altitude above mean sea level)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D011206.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2001-04-01 00:00:00 2001-08-23 15:30:00 Suspect
Subject: SGP EBBR E26 - Battery Voltage Low
Affected Datastreams: sgp30ebbrE26.b1
Description The battery voltage often dropped below 10.5 volts. All data for voltages below 10.5 volts should be considered to be incorrect. See the 15 minute data files, which contain the battery voltage, to determine when the data was incorrect.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D031222.24    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-12-12 19:35:00 2003-12-14 16:15:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Sensor Frozen By Ice Storm
Affected Datastreams: sgp30ebbrE26.b1
Description The wind speed sensor was frozen stopped by ice from a storm. The wind speed and residual wind speed measurements are incorrect.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D951116.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-11-11 02:40:00 1995-11-11 15:05:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Cups Frozen
Affected Datastreams: sgp30ebbrE26.b1
Description Freezing rain, snow, and below freezing conditions during the night of 10-11 November 1995 resulted in the wind speed sensor cups becoming frozen in a stopped state at E26, Cement, OK on early 11 November 1995. When temperatures rose to almost freezing under cloudless skies later in the day, the ice thawed and the cups were free to turn again. Measurements affected by the stalled wind speed sensor include: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D030728.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-06-12 02:30:00 2003-06-12 03:00:00 Incorrect
2003-06-13 12:00:00 2003-06-13 12:30:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Heat Flow #5 Large Positive
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #5 was large positive for these two periods, for an unknown reason.
Measurements
  • soil_heat_flow_5 (Soil heat flow 5)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D000627.11    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-07 09:00:00 2000-04-20 14:50:00 Incorrect
Subject: SGP/EBBR/E26 - Reference Temperature Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The reference temperature sensor did not work during the indicated period, causing the indicated measurements to be incorrect.
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_reference (Reference temperature in enclosure)
  • temp_air_top (Top air temperature)
  • sensible_heat_flux (Sensible heat flux)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D980507.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1997-06-18 01:30:00 1997-06-18 02:00:00 Incorrect
Subject: SGP/EBBR/E26 - Character In EBBR E26, 30 Minute Data
Affected Datastreams: sgp30ebbrE26.b1
Description A non-numeric character appears in the field for shf1 in the 30 minute data file at the time shown. Data processing programs that assume that a numeric character is there will display an error condition. I had to create a short routine to put in my analysis program to avoid using that data point.
Measurements
  • soil_heat_flow_1 (Soil heat flow 1)
 
DQR ID: D990622.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-04-15 18:30:00 1999-04-15 19:00:00 Incorrect
Subject: SGP/EBBR/E26 - Battery Wire Problem Causes Incorrect Data
Affected Datastreams: sgp5ebbrE26.b1
Description The battery voltage dropped suddenly to 8 volts at 1900 GMT, making all data incorrect for that time.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • time_offset (Time offset from base_time)
  • soil_temp_2 (Soil temperature 2)
  • lon (East longitude)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D010605.20    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-06-19 19:00:00 2000-06-19 19:01:00 Suspect
2000-03-24 01:00:00 2000-04-06 17:01:00 Suspect
2000-07-02 09:30:00 2000-07-02 16:01:00 Suspect
2000-07-03 12:30:00 2000-07-03 13:16:00 Suspect
2000-03-03 06:00:00 2000-03-07 09:01:00 Suspect
2000-06-30 09:45:00 2000-06-30 13:46:00 Suspect
2000-06-20 14:30:00 2000-06-20 22:01:00 Suspect
2000-06-19 08:30:00 2000-06-19 14:31:00 Suspect
2000-06-19 16:30:00 2000-06-19 17:31:00 Suspect
Subject: SGP EBBR E26 - Data Suspect, Low Battery Voltage
Affected Datastreams: sgp30ebbrE26.b1
Description The data measurements are suspect because of low battery voltage. Some measurements may be correct, but most are probably incorrect. Large home signals indicate very low battery voltage is present.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • bowen_ratio (Bowen ratio)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D050719.15    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2001-04-01 00:00:00 2005-03-31 17:00:00 Note
Subject: SGP/EBBR/E26 - Improved EBBR CR10 Program
Affected Datastreams: sgp30ebbrE26.b1
Description Effective 20050331.1700, the EBBR.E26 CR10 program was revised to improve the quality of the primary measurements as follows: 1) An RMS procedure is used to determine max and min limits of acceptable soil heat flow. This is applied to the individual soil sets. Measurements outside the limits are rejected and the measurements within the limits are used to calculate the average soil heat flow. 2) Max and min limits are used to determine incorrect values of net radiation, sensible heat flux (h), latent heat flux (e), and automatic exchange mechanism (AEM) signal. If AEM signal is outside the limits, h and e are set to 999s. If net radiation is outside the limits, h and e are set to 999s. If h or e are outside the limits, h and e are set to 999s. Virtually no incorrect soil measurement will affect the primary measurements of h and e. By setting h and e to 999s, it can be easily seen that the primary variables are incorrect; no other interpretation is possible. Prior to 20050331, the improved CR10 program was NOT in effect. DQRs have been submitted for known instances of incorrect soil measurements which affected the quality of the primary measurements of h and e. Note: the DQR begin date is the begin date of the sgp30ebbrE26.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE26.a1). ~
Measurements
  • latent_heat_flux (Latent heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D990409.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-04-01 14:15:00 1999-04-02 16:45:00 Missing
Subject: SGP/EBBR/E26 - Calibration Changeout
Affected Datastreams: sgp30ebbrE26.b1
Description The data from this period was either missing or incorrect during the calibration changeout of the EBBR unit.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • time_offset (Time offset from base_time)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • lon (East longitude)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D010605.22    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2001-01-03 15:30:00 2001-01-03 16:31:00 Incorrect
2000-10-16 15:00:00 2000-10-16 15:01:00 Incorrect
2001-01-02 16:00:00 2001-01-02 22:01:00 Incorrect
2000-10-23 19:00:00 2000-10-23 19:01:00 Incorrect
2000-09-06 22:30:00 2000-09-06 22:31:00 Incorrect
2000-09-10 14:30:00 2000-09-10 14:31:00 Incorrect
2000-10-27 14:30:00 2000-10-27 15:01:00 Incorrect
2000-10-26 15:30:00 2000-10-26 16:01:00 Incorrect
Subject: SGP EBBR E26 - All Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description All data was incorrect during these periods for unknown reasons. However, this tends to happen during preventative maintenance visits if sensors have to be changed out or tested and the datalogger program is reloaded, or if the battery voltage is low.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_2 (Soil temperature 2)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D011127.34    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2001-10-16 17:50:00 2001-10-16 19:21:00 Incorrect
2001-04-05 14:15:00 2001-04-05 15:46:00 Incorrect
Subject: SGP EBBR E26 - Data Incorrect During 6 Month Checks
Affected Datastreams: sgp30ebbrE26.b1
Description The data was incorrect during the 6 month checks.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D000221.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-01-08 02:30:00 2000-01-27 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - Right Aspirator Not Working
Affected Datastreams: sgp30ebbrE26.b1
Description The right aspirator fan did not work during the period. The following values were therefore incorrect: 5 minute: tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot, vp_top, vp_bot 15 minute: rr_thum_l, mv_hum_l, tair_l 30 minute: tair_top, tair_bot, thum_top. thum_bot, hum_top, hum_bot, vp_top, vp_bot, e, h, bowen
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D031222.25    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-12-12 21:40:00 2003-12-14 15:30:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Frozen By Ice Storm
Affected Datastreams: sgp30ebbrE26.b1
Description The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect.
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D000221.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-09-25 06:35:00 1999-10-07 16:20:00 Incorrect
Subject: SGP/EBBR/E26 - Anemometer Not Working, Wind Speed Incorrect
Affected Datastreams: sgp15ebbrE26.b1
Description The anemometer was not working during this period. The following values were therefore incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D020628.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-10-13 14:00:00 1995-10-13 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - 3-month Check
Affected Datastreams: sgp5ebbrE26.b1
Description During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during this period, at least, do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000623.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-13 12:15:00 2000-04-13 14:15:00 Incorrect
Subject: SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data
Affected Datastreams: sgp30ebbrE26.b1
Description Battery voltage below about 10.5 volts DC caused a number of the EBBR sensors to not measure correctly.
Measurements
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D980416.18    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1997-10-21 21:25:00 1997-10-21 21:48:00 Incorrect
Subject: SGP/EBBR/E26 - 3-Month Check
Affected Datastreams: sgp5ebbrE26.b1
Description During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period indicated.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D030128.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-01-14 17:25:00 2003-01-23 17:15:00 Incorrect
Subject: SGP/EBBR/E26 - Left Air Temperature Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The left air temperature was incorrect during the period. Poor electronic connections may have caused this.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • sensible_heat_flux (Sensible heat flux)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D941221.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-11-09 16:15:00 1994-11-09 18:00:00 Incorrect
Subject: SGP/EBBR/E26 - T/RH Check
Affected Datastreams: sgp30ebbrE26.b1
Description During the month of November 1994, site operations personnel conducted field comparisons of the temperature and relative humidity sensors in the EBBRs and the HMI31 portable T/RH meter (with the removable probe). As is reflected in the home signal output, the automatic exchange mechanism was disabled in order to conduct the checks. Measurements were taken every 5 minutes, for a half hour each in the aspirated radiation shields (the HMI31 was inserted into the EBBR aspirated radiation shield to provide the same aspiration as the EBBR sensors received). Measurements of aspirator flow were also recorded. This information was provided to the mentor. The mentor then compared the field checks with the data recorded by the EBBRs. The periods of data and data fields that are incorrect because of the checks are listed below. Times are those at which the data are reported. Data Fields 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot 15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, tair_r, tair_l 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, bowen, e, h 5 minute: 1615, 1620, 1625, 1630, 1635, 1640, 1645, 1650, 1655, 1700, 1705, 1710, 1715, 1720, 1725, 1730, 1735 15 minute: 1615, 1630, 1645, 1700, 1715, 1730, 1745 30 minute: 1630, 1700, 1730, 1800 (EDITOR'S NOTE: The following analysis refers to all EBBRs installed in Nov 1994) Results of the T/RH comparisons: The combined accuracy of the HMI31 and EBBR temperature sensors (thermocouples or PRTDs) is +/- 0.4 degrees C. The combined accuracy of the HMI31 and EBBR RH sensors is +/- 4% for RH less than 80%, and +/- 6% for RH greater than 80%. The combined accuracy for each pair of EBBR sensors of the same type is essentially the same as the quantities stated above. All of the pairs of EBBR sensors show differences that fall within the stated combined accuracies. Although this sounds wonderful, a few of the differences are close to the combined accuracy, which, because of the small differences in temperature being measured (normally smaller than the magnitude of the combined accuracy) could lead to some incorrect estimation of sensible and latent heat flux. However, unless there would be substantial differences of calibration slope of two sensors in a pair, the switching of height of the sensors every 15 minutes by the automatic exchange mechanism will remove the offset between the sensors. The comparisons between the EBBR sensors and the HMI31 T/RH meter showed much larger differences. The range of differences were: -2.4 to 0.0 degrees for the thermocouples, -2.1 to 0.1 degrees for the RH probe PRTDs, and -6.6 to 6.7 percent for the RH sensors. Six Thermocouples indicated differences from the HMI31 greater than the combined accuracy. Seven PRTDs indicated differences from the HMI31 greater than the combined accuracy. Four RH sensors indicated differences from the HMI31 greater than the combined accuracy. The temperature differences (for both thermocouples and PRTDs) were nearly all of one sign; the HMI31 indicated the greater temperature, which may suggest a bias in the HMI31 temperature measurement, even though a dozen differences of +/- 0.2 degrees were measured. Four differences of zero and only one positive difference (out of 40) were measured. Thirteen of the 20 RH differences were positive (HMI31 indicating the lower RH), with the differences near the level of the combined accuracies being approximately 50% positive and 50% negative. It does not appear that the HMI31 has a RH bias. Plots of EBBR sensor/HMI31 differences as a function of time from the installation of the individual sensors (a range of 10 to 30 months in the field) shows no obvious pattern of sensor drift with time. This is encouraging.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D951016.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-09-12 00:00:00 1995-10-13 12:30:00 Incorrect
Subject: SGP/EBBR/E26 - Net Radiometer Dome Punctured
Affected Datastreams: sgp30ebbrE26.b1
Description The upper dome of the net radiometer was punctured sometime between the PM visits of September 12 and 26, 1995. After the puncture, water collected in the top hemisphere. The water was removed on September 26, but a replacement dome was not available. The dome was replaced during the PM visit on October 13, 1995. The puncture and water did not result in obviously incorrect data. I cannot tell when the puncture occurred from the data. The data, particularly during the two weeks between September 12 and 26, 1995, should be considered suspect. Suspect net radiation data results in the latent heat flux and sensible heat flux also being suspect. Suspect data then includes: 5 minute: q 15 minute: mv_q 30 minute: q, e, h.
Measurements
  • latent_heat_flux (Latent heat flux)
  • net_radiation (Net radiation)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D980529.17    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1998-05-19 16:46:00 1998-05-19 17:17:00 Incorrect
Subject: SGP/EBBR/E26 - Six Month Checks
Affected Datastreams: sgp30ebbrE26.b1
Description During EBBR 6 month checks (formally called 3 month checks) the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed just before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period indicated.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D950921.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-08-26 03:45:00 1995-09-12 20:00:00 Incorrect
Subject: SGP/EBBR/E26 - AEM replacement
Affected Datastreams: sgp30ebbrE26.b1
Description Please see DQR P950908.2, where this problem was first documented. On August 26, 1995 at approximately 0345 GMT the gears on the lower sprocket shaft of the AEM appear to have been damaged, causing the AEM to stop exchanging. The home signal values then remained at around -0.5 for both home_15 and Home_30. On August 29 site operations personnel removed the fuse (to prevent exchange) with the left aspirator in the down position. On 12 September 1995 the AEM was replaced at 1959 GMT (old S/N 92004, new S/N 92008) and is functioning properly. Calculations of Bowen ratio, latent heat flux, and sensible heat flux are incorrect for all times during the period above. The data fields listed below are incorrect during the period: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, Bowen, e, h. It is not possible to reliably calculate the Bowen ratio, e, and h using the 15 minute data.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • rh_top_fraction (Top relative humidity (fractional))
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D030117.26    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-07-11 16:00:00 2002-07-11 16:29:00 Incorrect
Subject: SGP/EBBR/E26 - Measurements zero following logger restart
Affected Datastreams: sgp30ebbrE26.b1
Description Most of the measurements were zero, which normally happens after a datalogger restart.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_4 (Soil temperature 4)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D990127.31    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-01-08 08:35:00 1999-01-08 16:00:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Data Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description The wind direction sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: res_ws, wind_d, sigma_wd 15 minute: mv_wind_d 30 minute: res_ws, wind_d, sigma_wd
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D050324.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-01-10 17:00:00 2005-03-03 16:00:00 Incorrect
Subject: SGP/EBBR/E26 - Incorrect soil type coefficients used
Affected Datastreams: sgp30ebbrE26.b1
Description The soil type coefficents for soil moisture were incorrect from the day of the system installation on, making soil moisture values too large. As a result, soil heat flows were overmeasured, and sensible and latent heat fluxes were underestimated.
Measurements
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D950626.14    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-04-26 19:45:00 1995-04-26 20:00:00 Incorrect
Subject: SGP/EBBR/E26 - Reprocess: Soil Heat Flow Sensor 1 Replacement
Affected Datastreams: sgp30ebbrE26.b1
Description During preventative maintenance, site operations personnel observed that soil heat flow sensor #1 at Cement, OK (E26) was outputting larger values than the other four sensors. Therefore, they replaced sensor #1. A review of the data indicates that the sensor was not malfunctioning, but that its calibration was just too large. The longer the sensors are in the ground, the greater the likelihood that they will drift from their original calibration. The difference in the average soil heat flux caused by the #1 sensor data values being included in the average will have less than a 5% affect on the calculated latent and sensible heat fluxes. The data should therefore not be labelled as incorrect. However, during the replacement of sensor #1, the #1 data was spiked, causing the following data values to be incorrect for the period listed: 15 minute: mv_hft1 at 1945 GMT. 30 minute: shf5, c_shf5, g5, ave_shf, e, h, bowen at 2000 GMT. The latent and sensible heat fluxes can be recalculated by using only soil heat flows 2 through 5 to calculate the average soil heat flow, ave_shf = (g2 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q).
Measurements
  • bowen_ratio (Bowen ratio)
  • soil_heat_flow_5 (Soil heat flow 5)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D961122.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-07-16 15:00:00 1996-07-16 22:30:00 Missing
Subject: SGP/EBBR/E26 - Annual Calibration Changeout
Affected Datastreams: sgp30ebbrE26.b1
Description On 16 November 1996 the EBBR changeout for annual calibration occurred at E26, Cement, OK. SEBS unit 2 was removed and unit 8 was installed. Between 1500 and 2230 GMT no data or incorrect data was collected; most of the data is missing. 3 month calibration checks were being performed.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • time_offset (Time offset from base_time)
  • lon (East longitude)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • lat (North latitude)
  • alt (Altitude above mean sea level)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D941212.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-12-07 04:30:00 1994-12-07 08:00:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Affect on Soil Moisture 2
Affected Datastreams: sgp30ebbrE26.b1
Description I have written a number of previous PIFs and DQRs about this same problem previously. This occurred most recently at E9, Ashton, KS in August 1994. The wind direction sensor is on the same data acquisition system multiplexer pair as soil moisture sensor 2. Sometimes a malfunctioning wind direction sensor (resulting in a constant wind direction of 135 degrees) will cause the soil moisture 2 measurement to be offscale. Between 0430 and 0800 GMT the wind direction sensor did not function properly at E22, Cordell, KS. As has often been the case, soil moisture measurements were affected for a shorter time period, from 0500 through 0730 GMT. The cause of this problem is unknown and only occurs on the multiplexer pair to which the wind direction sensor is connected, not on any other pair to which a soil moisture sensor is attached. None of the manufacturers of the applicable equipment can explain the problem. As done before, I will monitor the data for further occurrences of this condition; if the frequency of occurrence increases, further action will be taken. The following data and times are incorrect: Winds: 0430-0800 GMT 5 minute: wind_d, sigma_wd, res_ws 15 minute: mv_wind_d 30 minute: wind_d, sigma_wd, res_ws Soil Moisture 2: 0500-0730 GMT 15 minute: r_sm2 30 minute: sm2, c_shf2, cs2, ces2, g2, ave_shf, h, e
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • latent_heat_flux (Latent heat flux)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D030514.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-04-19 19:00:00 2003-05-16 15:00:00 Incorrect
Subject: SGP/EBBR/E26 - E26 EBBR Soil Heat Flow #1 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #1 was incorrect much of the time. The sensor was replaced.
Measurements
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D000627.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-24 01:00:00 2000-04-06 17:30:00 Incorrect
Subject: SGP/EBBR/E26 - Electronics Problem
Affected Datastreams: sgp30ebbrE26.b1
Description Incorrect home signal indicates an electronic problem that affected the indicated measurements; this may have been a multiplexer #2 problem as all sensors affected are connected to that multiplexer and no sensors on multiplexer #1 were affected.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D030117.29    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-11-01 08:45:00 2002-11-06 01:30:00 Incorrect
Subject: SGP/EBBR/E26 - Battery Voltage Low
Affected Datastreams: sgp30ebbrE26.b1
Description When Battery Voltage drops below 10.5 volts, most measurements are suspect and some are often incorrect. The user will need to inspect the data carefully to determine the useability of the data.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • net_radiation (Net radiation)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • bowen_ratio (Bowen ratio)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D950626.19    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-05-28 01:30:00 1995-06-01 16:30:00 Incorrect
1995-05-09 17:05:00 1995-05-16 19:00:00 Incorrect
1995-06-05 17:30:00 1995-06-05 19:00:00 Incorrect
1995-05-24 19:30:00 1995-05-28 01:00:00 Incorrect
1995-06-06 15:30:00 1995-06-06 19:00:00 Incorrect
Subject: SGP/EBBR/E26 - Right Air Temperature Malfunction
Affected Datastreams: sgp5ebbrE26.b1
Description The right air temperature probe malfunctioned continuously during the periods of time indicated above as continuous. On May 16, 1995, by 1900 GMT, the probe was replaced (old S/N 92007, new S/N 92013). There was a complete loss of data between 1200 and 1900 GMT as Site Operations repaired a corroded battery terminal. For several days the right air temperature probe worked well. However, between May 24 and 28, the right air temperature probe malfunctioned continuously again. The right air temperature probe malfunctioned intermittently between May 28 and June 1, as well as during short periods on June 5 and 6. The cause of these latter periods is unknown; the time periods do not correspond with any Site Operations activities. During the intermittent periods the data that is not offscale should be viewed as questionable, as it is not always easy to detect what effect the malfunction might have had on that data. The malfunction of the right air temperature probe results in incorrect Bowen ratio, sensible heat flux, and latent heat flux during the periods indicated. The data values that are affected are: 5 minute: tair_top, tair_bot 15 minute: tair_r 30 minute: tair_top, tair_bot, bowen, e, h.
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D950626.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-03-06 22:05:00 1995-03-07 22:30:00 Incorrect
Subject: SGP/EBBR/E26 - Frozen Wind Speed Sensor
Affected Datastreams: sgp5ebbrE26.b1
Description On March 6, 1995 freezing rain stopped the cups of the EBBR wind speed instrument at Cement, OK (E26). All 5, 15, and 30 minute data values indicated below are incorrect for the period listed. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D960409.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-04-01 17:15:00 1996-04-01 18:30:00 Incorrect
Subject: SGP/EBBR/E26 - Right Air Temperature Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description The right air temperature probe malfunctioned and produced incorrect data during the period of time indicated above. The cause of the problem is unknown. The right air temperature probe appears to be working well presently. The malfunction of the right air temperature probe results in incorrect Bowen ratio, sensible heat flux, and latent heat flux during the period above. The data values that are affected are: 5 minute: tair_top, tair_bot 15 minute: tair_r (1715-1830 GMT values) 30 minute: tair_top, tair_bot, bowen, e, and h (1730-1830 GMT values)
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000623.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-16 08:45:00 2000-04-16 15:00:00 Incorrect
Subject: SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data
Affected Datastreams: sgp30ebbrE26.b1
Description Battery voltage less than 10.5 volts DC causes some sensors to make incorrect measurements.
Measurements
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_4 (Soil heat flow 4)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D010723.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-15 15:30:00 2001-02-22 15:35:00 Incorrect
Subject: SGP EBBR E26 - Soil Heat Flow #5 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #5 was large negative during this period. Therefore, calculated average soil heat flow, latent heat flux, and sensible heat flux were incorrect. These measurements can be recalculated from the use of measurements from only soil heat flow sensors #1-4.
Measurements
  • soil_heat_flow_5 (Soil heat flow 5)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D961122.12    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-07-24 10:15:00 1996-08-13 18:00:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Failure
Affected Datastreams: sgp30ebbrE26.b1
Description Wind Direction and resultant wind speed data for the period listed above is incorrect. Wind direction would not record outside 0 to 20 degrees. This is a common malfunction in this style of wind direction sensor. The sensor was replaced on 13 August 1996. The old sensor S/N was K3038 and new sensor is S/N K3033. The affected data values are: 5 minute: wind_d, sigma_wd, res_ws 15 minute: mv_wind_d 30 minute: wind_d, sigma_wd, res_ws
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D000623.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-15 10:30:00 2000-03-15 14:30:00 Incorrect
Subject: SGP/EBBR/E26 - All Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description All data was incorrect for an unknown reason.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D961122.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-11-06 20:00:00 1996-11-19 18:30:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Failure
Affected Datastreams: sgp30ebbrE26.b1
Description Wind Direction and resultant wind speed data for much of the period listed above is incorrect. Wind directions of 135, 0, or 360 would continue for extended periods. This behavior is indicative of a failed sensor. This is a common malfunction in this style of wind direction sensor. A work request has been submitted to site operations for replacement of the sensor. All values of 135, 0, and 360 should be considered to be incorrect during the period above. Furthermore, more incorrect data may occur until the sensor is replaced (by 6 December). The affected data values are: 5 minute: wind_d, sigma_wd, res_ws 15 minute: mv_wind_d 30 minute: wind_d, sigma_wd, res_ws
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D980117.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1998-01-08 01:00:00 1998-01-08 20:30:00 Incorrect
Subject: SGP/EBBR/E26 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown)
Affected Datastreams: sgp30ebbrE26.b1
Description The EBBR AEM stopped exchanging because of icing at during this time period. The calculations of Bowen ratio, latent heat flux, and sensible heat flux are incorrect for the time period indicated. The other measurements listed are also incorrect for those times:
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D021113.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1993-12-01 12:00:00 2003-06-18 11:59:00 Note
Subject: SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header
Affected Datastreams: sgp30ebbrE13.b1
Description The units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in the EBBR 30 minute netcdf header have been incorrect from the beginning of processing the data into netcdf files. The correct units are MJ/m^3/C. This does not affect the data quality. (NOTE: The actual begin date of some of these data streams is as early as 7/4/93. This DQR applies to all 30m EBBR data.)
Measurements
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
 
DQR ID: D960501.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-04-23 15:00:00 1996-04-23 21:15:00 Incorrect
Subject: SGP/EBBR/E26 - Right Air Temp Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description The right air temperature probe malfunctioned and produced incorrect data during the period of time indicated above. The probe (S/N 92013) was replaced by Site Operations on 23 April 1996 at 2115 GMT with S/N 92002. The malfunction of the right air temperature probe results in incorrect Bowen ratio, sensible heat flux, and latent heat flux during the period indicated. The data values that are affected are: 5 minute: tair_top, tair_bot 15 minute: tair_r (1515-2115 GMT values) 30 minute: tair_top, tair_bot, bowen, e, and h (1530-2130 GMT values)
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D030128.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-01-10 19:00:00 2003-01-10 19:04:00 Incorrect
Subject: SGP/EBBR/E26 - Data zeros following logger restart
Affected Datastreams: sgp30ebbrE26.b1
Description Most measurements were zero after restart of the CR10 datalogger, after a calibration changeout of the EBBR unit.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D030117.28    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-08-27 08:30:00 2002-09-05 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - Water in broken Net Radiometer Dome
Affected Datastreams: sgp30ebbrE26.b1
Description The net radiation measurement is incorrect. Measurements calculated using net radiation are also incorrect. No work-around is possible for this situation.
Measurements
  • latent_heat_flux (Latent heat flux)
  • net_radiation (Net radiation)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D051112.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-10-13 00:00:00 2005-07-22 23:59:00 Note
Subject: SGP/EBBR/E26 - metadata corrections
Affected Datastreams: sgp30ebbrE26.b1
Description On 20050723, a series of metadata corrections and additions were completed. These metadata changes apply to all EBBR.E26 data collected by ARM back to the installation of the instrument in June 1992. Please see the current metadata for correct information. These changes do not affect data values or quality. The changes are summarized below: 1) Update of "sensor location" information 2) Addition of installation dates for the systems 3) Correction of soil moisture units (from "by volume" to "gravimetric")
Measurements
  • base_time (Base time in Epoch)
 
DQR ID: D010723.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-11-02 16:00:00 2000-11-02 16:01:00 Incorrect
2001-01-03 17:00:00 2001-01-03 17:01:00 Incorrect
2000-09-10 15:00:00 2000-09-10 15:01:00 Incorrect
Subject: SGP EBBR E26 - Some Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Since soil temperature was not available for the previous half hour, soil energy storage could not be calculated properly for the indicated period. The individual soil heat storage from the five soil sets, average soil heat flow, sensible heat flux, and latent heat flux are therefore incorrect.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • latent_heat_flux (Latent heat flux)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D960104.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-12-18 21:10:00 1995-12-19 14:25:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Cups Frozen
Affected Datastreams: sgp5ebbrE26.b1
Description Freezing rain, snow, and below freezing conditions during 18-19 January 1995 caused the wind speed sensor cups to freeze in a stopped state at E26, Cement, OK on 18 January 1995. When temperatures rose to above freezing on 19 January, the ice thawed and the cups turned freely again. Measurements affected by the stalled wind speed sensor include: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D970627.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-12-03 19:30:00 1997-06-17 20:30:00 Incorrect
Subject: SGP/EBBR/E26 - Reprocess: E26 Soil Heat Flow Sensor 1 Replacement
Affected Datastreams: sgp30ebbrE26.b1
Description Apparently, during installation of the present system on 17 July 1996, soil heat flow sensor #4 was intentionally placed upside down in the soil to produce the correct sign of flux. The leads from the sensor must have been connected with the wrong polarity. On 3 December 1996 site operations corrected some wiring problems and reconnected soil heat flow sensor #4 according to the proper color code; this caused the sign of the soil heat flow from that sensor to then be opposite of the other four sensors. All data from sensor #4 is the wrong sign during the period listed above. On 17 June 1997 site operations removed the sensor and installed it with the correct side up, fixing the problem. The result of this problem was a decrease of reported average soil heat flow of approximately 40%. This translates into a 0 to 20% error in latent and sensible heat fluxes (soil heat flow is rarely more than 50% of net radiation, upon which the Bowen ratio calculation depends). Therefore, sensible and latent heat fluxes were typically overestimated by about 10% during the daytime. This is of the same magnitude as the EBBR system/technique error. The following data values were affected for the period listed above: 15 minute: mv_hft4 30 minute: shf4, c_shf4, g4, ave_shf, e, h The latent and sensible heat fluxes can be recalculated by using only soil heat flows 1, 2, 3, and 5 to calculate the average soil heat flow, ave_shf = (g1 + g2 + g3 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q).
Measurements
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D951016.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-09-27 21:00:00 1995-10-13 12:30:00 Incorrect
Subject: SGP/EBBR/E26 - Battery Voltage Drop
Affected Datastreams: sgp5ebbrE26.b1
Description Shortly after the PM visit on September 26, 1995 the EBBR battery voltage at E26, Cement, OK declined to lower than acceptable levels. During the October 13, 1995 PM visit the battery was replaced. I do not know the specifics of why the battery voltage declined so suddenly, but failure of one or more of the battery cells is a possibility. I have not received the site operations log of the PM visit yet. The voltage dropped to 10 volts at night. At various times, soil temperature, soil heat flux plate output, and atmospheric pressure (at least) were not reported correctly by the CR10 datalogger. Amazingly, the AEM continued to work and reported millivolt outputs that did not fall below the acceptable ranges. All data between 2100 GMT on September 26, 1995 and 1230 GMT on October 13, 1995 should be considered suspect, particularly when the battery voltage fell below 11 volts (every nighttime). This general caution is issued because incorrect reporting of data also took place during times when the battery voltage was reported as 12 Volts, a normally acceptable level; the reason for this behavior is unknown.
Measurements
  • vapor_pressure_top (Top vapor pressure)
  • soil_heat_flow_2 (Soil heat flow 2)
  • atmos_pressure (Atmospheric pressure)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • soil_temp_5 (Soil temperature 5)
  • soil_temp_1 (Soil temperature 1)
  • soil_heat_flow_4 (Soil heat flow 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D000623.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-14 06:15:00 2000-04-14 15:30:00 Incorrect
Subject: SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data
Affected Datastreams: sgp30ebbrE26.b1
Description Battery voltage less than 10.5 volts DC causes some sensors to measure incorrectly.
Measurements
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_4 (Soil heat flow 4)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D971021.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1997-04-23 20:08:00 1997-04-23 20:50:00 Incorrect
Subject: SGP/EBBR/E26 - EBBR Biannual Checks
Affected Datastreams: sgp30ebbrE26.b1
Description During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • rh_top_fraction (Top relative humidity (fractional))
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000623.5    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-13 17:45:00 2000-04-13 18:00:00 Incorrect
Subject: SGP/EBBR/E26 - Low Battery Voltage Causes Incorrect Data
Affected Datastreams: sgp30ebbrE26.b1
Description Battery voltage less than 10.5 volts DC causes some sensors to measure incorrectly.
Measurements
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D000627.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-02-25 21:45:00 2000-02-26 11:30:00 Incorrect
Subject: SGP/EBBR/E26 - Left Air Temperature Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Incorrect left air temperature caused the indicated measurements to be incorrect.
Measurements
  • latent_heat_flux (Latent heat flux)
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D031103.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-10-30 15:45:00 2003-11-13 15:45:00 Incorrect
Subject: SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description During a preventative maintenance visit to perform the 6-month calibrations, the home15 and home30 outputs began reading the same as one another. A fuse replacement and lubrication of the AEM sprockets on 11/13 corrected the problem. During the interval specified, the home15, home30, and sensible and latent heat fluxes are incorrect.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
 
DQR ID: D990127.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-01-09 02:00:00 1999-01-14 18:30:00 Incorrect
Subject: SGP/EBBR/E26 - Battery Voltage Low, Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Battery voltages less than 10.4 volts occurred some of the time. All data should be considered incorrect when the voltage is less than 10.4 volts.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • bowen_ratio (Bowen ratio)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • lon (East longitude)
  • time_offset (Time offset from base_time)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D960508.10    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-04-09 18:20:00 1996-04-09 20:00:00 Incorrect
Subject: SGP/EBBR/E26 - 3-month check
Affected Datastreams: sgp30ebbrE26.b1
Description During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during this period, at least, do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. The period of incorrect data for the EBBR is listed; data times affected do not include the beginning time and do include the ending time (data files are denoted by the end time).
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000623.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-28 20:45:00 2000-05-04 15:00:00 Suspect
Subject: SGP/EBBR/E26 - EBBR E26 Left Aspirator Not Working
Affected Datastreams: sgp30ebbrE26.b1
Description The data is suspect because of inadequate aspiration for the sensors in the left aspirated radiation shield.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000627.10    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-02-26 15:30:00 2000-04-20 14:50:00 Suspect
Subject: SGP/EBBR/E26 - Left Air Temperature Periodically Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description Left air temperature periodically was incorrect, causing the indicated measurements to be incorrect. The user will need to inspect the data to see when the left air temperature was incorrect (compare left with right air temperature or with the humidity probe temperature).
Measurements
  • latent_heat_flux (Latent heat flux)
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D031211.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-10-13 00:00:00 2004-09-29 18:45:00 Incorrect
Subject: SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description In a trip to E26, I found that a bad spark gap through which the barometer was powered was causing pressure measurements to be incorrect. The pressure readings oscillated with the voltage of the EBBR battery. During daytime the voltage and thus the pressure would increase and vice versa during dark hours. Apparently only the positive side of the power supply was properly connected through the spark gap and thus the voltage received by the pressure sensor was lower than required to power it properly. Under this condition the perssure measurement varies with voltage level. The pressure measurements therefore had a diurnal signature and usually were incorrect. The decreased pressure during most times would cause latent heat flux to be slightly overestimated and sensible heat flux to be slightly underestimated.
Measurements
  • bowen_ratio (Bowen ratio)
  • latent_heat_flux (Latent heat flux)
  • atmos_pressure (Atmospheric pressure)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D031204.21    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-10-30 15:35:00 2003-10-30 16:15:00 Incorrect
Subject: SGP/EBBR/E26 - 6 Month Checks
Affected Datastreams: sgp30ebbrE26.b1
Description Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D020717.39    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-06-01 21:15:00 2002-06-30 23:56:00 Suspect
Subject: SGP/EBBR/E26 - Multiplexer 2 Failure From High Temperature
Affected Datastreams: sgp30ebbrE26.b1
Description Multiplexer 2 is failing during times of control box temperatures above 29 degrees C. The failure begins in the last channel and progresses to lower channels as the temperature increases. It has not yet been determined whether the failure is in the relays or a solid state component of the multiplexer. This condition is probably due to the aging of the device and the millions of cycles that this 10 year old device has made. More failures of this sort may occur in the future. A cure is being sought aside from replacement of the multiplexers to prevent the problem. The indicated measurements need to be inspected to determine which ones are usable.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_flow_3 (Soil heat flow 3)
  • soil_heat_flow_5 (Soil heat flow 5)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D950308.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-02-16 15:00:00 1995-02-17 12:30:00 Incorrect
Subject: SGP/EBBR/E26 - Frozen Wind Speed Sensor
Affected Datastreams: sgp30ebbrE26.b1
Description On February 16, 1994 a frontal system deposited freezing rain in central Oklahoma that resulted in the EBBR wind speed instrument becoming frozen in place at Cement (E26) for part of two days. All 5, 15, and 30 minute data values indicated below are incorrect for all times within the period indicated. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D950908.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-08-26 03:45:00 1995-09-12 20:00:00 Incorrect
Subject: SGP/EBBR/E26 - AEM not exchanging
Affected Datastreams: sgp5ebbrE26.b1
Description On August 26, 1995 at approximately 0345 GMT the gears on the lower sprocket shaft of the AEM appear to have been damaged, causing the AEM to stop exchanging. The home signal values then remained at around -0.5 for both home_15 and Home_30. On August 29 site operations personnel removed the fuse (to prevent exchange) with the left aspirator in the down position. The AEM will remain in this condition until a replacement is available. Therefore, the calculations of Bowen ratio, latent heat flux, and sensible heat flux are incorrect for all times after August 26, 1995 at 0345 GMT. The data fields listed below are incorrect after this time: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, Bowen, e, h. It is not possible to reliably calculate the Bowen ratio, e, and h using the 15 minute data.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D950626.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-03-17 20:00:00 1995-03-19 05:00:00 Incorrect
1995-03-19 19:05:00 1995-04-12 14:30:00 Incorrect
Subject: SGP/EBBR/E26 - Frozen Wind Speed Sensor
Affected Datastreams: sgp30ebbrE26.b1
Description A broken lead on the EBBR wind speed instrument cable at Cement, OK (E26) resulted in the loss of wind speed data. It was nearly a month before the cable could be repaired and reinstalled. All 5, 15, and 30 minute data values indicated below are incorrect for the periods listed above. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D010723.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-06 17:30:00 2001-02-08 15:46:00 Incorrect
Subject: SGP EBBR E26 - Soil Moisture #1 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Moisture #1 was a constant 33.7 and was incorrect. Latent and Sensible Heat fluxes were normally minimally affected.
Measurements
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D940606.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-05-22 22:00:00 1994-05-25 16:45:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description For an unknown reason, the wind speed sensor at Cement began to record very low wind speeds on a consistent basis, with most of the speeds recorded reflecting what appeared to be zero wind speed (calibration offset). When the sensor was replaced on 5/25/94, it was damaged, although this damage apparently did not occur until a thunderstorm around midnight (local time) May 24. The wind direction sensor was also damaged by the storm at the same time. At any rate, the wind speed data during the period listed should be considered questionable. The wind speed sensor was replaced on May 25, 1994 at 1639. Old sensor S/N K1032, New sensor S/N K1035.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D940818.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-07-31 21:00:00 1994-08-17 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Moisture Sensor Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description Soil moisture sensor #1 at Cement, Ok, E26 began a slow drift downwards on July 31, 1994. This continued until the sensor was replaced at 1700 GMT on August 17, 1994. The downwards drift occured coincident with a constant decrease in soil moisture at the site. As a result, the average soil moisture (for the set of five sensors) was reduced by only about 2% (for a range of 10 to 22%), and thus had a negligible effect on the calculations of sensible and latent heat flux. The sm1 output dropped below zero at times during August 14-17. Soil Moisture #1 Data Fields: 15 minute: r_sm1 30 minute: sm1
Measurements
  • soil_moisture_1 (Soil moisture 1, gravimetric)
 
DQR ID: D010723.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-08-23 03:45:00 2000-08-23 04:01:00 Incorrect
Subject: SGP EBBR E26 - AEM Inbetween, Data Incorrect
Affected Datastreams: sgp5ebbrE26.b1
Description While the AEM was inbetween the correct measurement positions the measurements from the two levels were incorrect. The sensible and latent heat fluxes and Bowen ratio were therefore incorrect also.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D000627.8    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-03 06:00:00 2000-03-07 14:55:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Heat Flow #2 Large Negative
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #2 was large negative and incorrect for an unknown reason.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • soil_heat_flow_2 (Soil heat flow 2)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D940329.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-03-07 14:00:00 1994-03-16 17:00:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Malfunction
Affected Datastreams: sgp30ebbrE26.b1
Description The wind direction sensor malfunctioned, outputting nearly a constant value, invalidating the following data values. 30 minute: wind_d, sigma_wd, res_ws 15 minute: mv_wind_d 5 minute: wind_d, sigma_wd, res_ws The first good data after the affected period was the 1700 GMT, 30 minute data on March 16, 1994.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wdir_vec_mean (Wind direction vector mean)
  • wdir_vec_std (Wind direction vector mean standard deviation)
 
DQR ID: D960119.3    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-01-09 20:00:00 1996-01-09 20:30:00 Incorrect
1996-01-07 20:15:00 1996-01-07 23:30:00 Incorrect
1996-01-04 15:15:00 1996-01-05 04:30:00 Incorrect
1996-01-08 15:45:00 1996-01-09 13:30:00 Incorrect
Subject: SGP/EBBR/E26 - Right tair Offscale
Affected Datastreams: sgp30ebbrE26.b1
Description On five days in January 1996 at E26, Cement, OK EBBR the right thermocouple output went offscale. The cause for this is unknown, although poor probe connections are common. Site Operation personnel tightened the probe connections in mid January. Five minute data would need to be inspected during the periods indicated for incorrect five minute values. Incorrect data for the period indicated includes: 5 minute: tair_top, tair_bot 15 minute: tair_r 30 minute: tair_top, tair_bot, bowen, h, e The data are not recoverable from other measurements.
Measurements
  • latent_heat_flux (Latent heat flux)
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D940606.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1994-05-25 04:30:00 1994-05-25 16:40:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Failure
Affected Datastreams: sgp30ebbrE26.b1
Description Apparently, a fairly severe thunderstorm passed over the Cement, OK EBBR early on May 25, 1994 (around midnight May 24, local time). The storm damaged the wind direction sensor and the wind speed sensor. Wind Direction and Sigma of Wind Direction data for the period listed should be considered incorrect. The sensors were replaced on May 25, 1994 at 1631. Old sensor S/N K3038, New sensor S/N K3040.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wdir_vec_mean (Wind direction vector mean)
  • wdir_vec_std (Wind direction vector mean standard deviation)
 
DQR ID: D000623.11    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-02-22 23:00:00 2000-02-23 00:30:00 Incorrect
Subject: SGP/EBBR/E26 - All Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description All data wqas incorrect for an unknown reason.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • net_radiation (Net radiation)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D041222.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-03-21 15:30:00 2003-10-12 23:55:00 Incorrect
Subject: SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description In a trip to E26, I found that a bad spark gap through which the barometer was powered was causing pressure measurements to be incorrect. The pressure readings oscillated with the voltage of the EBBR battery. During daytime the voltage and thus the pressure would increase and vice versa during dark hours. Apparently only the positive side of the power supply was properly connected through the spark gap and thus the voltage received by the pressure sensor was lower than required to power it properly. Under this condition the perssure measurement varies with voltage level. The pressure measurements therefore had a diurnal signature and usually were incorrect. The decreased pressure during most times would cause latent heat flux to be slightly overestimated and sensible heat flux to be slightly underestimated.
Measurements
  • bowen_ratio (Bowen ratio)
  • latent_heat_flux (Latent heat flux)
  • atmos_pressure (Atmospheric pressure)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D970330.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-11-06 20:00:00 1996-11-19 18:25:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Direction Sensor Failure
Affected Datastreams: sgp5ebbrE26.b1
Description Wind Direction and Sigma of Wind Direction data for the period listed is incorrect. The wind direction sensor began to malfunction on 6 November, with the characteristic constant 135 degree output. At other times the output remained a nearly constant 230 to 240 degrees. On 16 November at 1819 GMT site operations replaced sensor S/N 3033 with S/N 3036. Apparently they left it aligned at north when they left the EF; output for the next few days was 0 or 360 degrees, until they returned on 19 November at 1825 GMT and gave the vane it's freedom. Affected fields are: 5 minute: wind_d, sigma_wd 15 minute: mv_wind_d 30 minute: wind_d, sigma_wd
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D000623.10    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-02-22 13:30:00 2000-02-22 15:00:00 Incorrect
Subject: SGP/EBBR/E26 - EBBR E26 All Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description All data was incorrect for an unknown reason.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_4 (Soil temperature 4)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_flow_1 (Soil heat flow 1)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D010213.12    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-12-25 06:00:00 2000-12-28 11:45:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Iced
Affected Datastreams: sgp15ebbrE26.b1
Description The anemometer was frozen stopped by freezing rain. Indicated data are incorrect.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D030919.11    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-08-21 16:00:00 2003-08-21 16:00:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Storage Incorrect; Surface Fluxes Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The half hour after restart of the CR10 datalogger, the soil temperatures for the beginning of the period are missing. Therefore the soil energy storage and surface flux values are also incorrect.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
 
DQR ID: D020717.38    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-05-30 15:30:00 2002-05-30 15:31:00 Incorrect
Subject: SGP/EBBR/E26 - Measurements Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Change of energy storage (CES) measurements (calculated from the change of soil temperature with time) are sometimes incorrect after a CR10 program restart because the beginning measurement of the averaging period is zero. Average soil heat flow, sensible heat flux, and latent heat flux were affected and cannot be recalculated.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • latent_heat_flux (Latent heat flux)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D951113.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1995-11-01 15:45:00 1995-11-01 18:45:00 Incorrect
Subject: SGP/EBBR/E26 - Right Tair Offscale
Affected Datastreams: sgp30ebbrE26.b1
Description On 1 November 1995 at E26, Cement, OK EBBR the right thermocouple output went offscale for a few hours. The cause for this is unknown and the sensor recovered fully. Incorrect data for the period above includes: 5 minute: tair_top, tair_bot 15 minute: tair_r, tair_l 30 minute: tair_top, tair_bot, bowen, h, e
Measurements
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • latent_heat_flux (Latent heat flux)
  • sensible_heat_flux (Sensible heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D020717.37    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-05-30 15:00:00 2002-05-30 15:01:00 Incorrect
Subject: SGP/EBBR/E26 - Measurements Zero
Affected Datastreams: sgp30ebbrE26.b1
Description The measurements are often zero after a CR10 datalogger restart, as occurred here.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • soil_temp_4 (Soil temperature 4)
  • soil_temp_2 (Soil temperature 2)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_4 (Soil heat flow 4)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D000210.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-06-11 00:00:00 1999-06-29 21:45:00 Incorrect
Subject: SGP/EBBR/E26 - Temperature from Left T/RH Probe Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The temperature from the left T/RH probe went offscale frequently. This temperature is used in the calculation of the vapor pressure. Therefore, top and bottom Thum measurements, left Thum, top and bottom vapor pressure measurements, vapor pressure gradients, and the resulting latent and sensible heat fluxes and bowen ratio were frequently incorrect for the period stated.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
 
DQR ID: D971027.9    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1997-09-10 00:00:00 1997-09-10 23:59:00 Incorrect
Subject: SGP/EBBR/E26 - Bad Dates
Affected Datastreams: sgp30ebbrE26.b1
Description At the end of the netcdf 30 minute file for 10 September 1997 there are two half hours with date 9 September 1997, and time 2200 GMT. It is unknown how this happens, but it does occasionally. Those two half hour records should be ignored.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_5 (Soil heat flow 5)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • net_radiation (Net radiation)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • lon (East longitude)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • time_offset (Time offset from base_time)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • soil_heat_flow_4 (Soil heat flow 4)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D010605.24    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-03-04 15:00:00 2000-03-07 09:01:00 Incorrect
2000-02-18 03:30:00 2000-02-19 11:31:00 Incorrect
Subject: SGP EBBR E26 - Soil Heat Flow #2 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #2 was incorrect. Average soil heat flow, sensible heat flux, and latent heat flux were therefore also incorrect; these can be re-calculated from the remaining correct soil heat flows.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • soil_heat_flow_2 (Soil heat flow 2)
  • sensible_heat_flux (Sensible heat flux)
  • latent_heat_flux (Latent heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
 
DQR ID: D940211.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1993-12-28 16:45:00 1993-12-28 19:00:00 Incorrect
Subject: SGP/EBBR/E26 - Invalid data during Preventative Maintenance
Affected Datastreams: sgp30ebbrE26.b1
Description During a preventative maintenance visit the +12V DC supply to the wind direction sensor at E26, Cement, Ok was temporarily disconnected, resulting in invalid wind direction data for December 28, 1993 from 1645 through 1900 GMT. The following fields are therefore invalid for that period: 30 minute: wind_d, sigma_wd, res_ws 15 minute: mv_wind_d 5 minute: wind_d, sigma_wd, res_ws.
Measurements
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • wdir_vec_mean (Wind direction vector mean)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D990127.42    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-01-08 03:15:00 1999-01-09 06:00:00 Incorrect
1998-12-21 07:05:00 1998-12-24 16:30:00 Incorrect
Subject: SGP/EBBR/E26 - Wind Speed Data Incorrect
Affected Datastreams: sgp15ebbrE26.b1
Description The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws,
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D000211.13    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-06-11 00:00:00 1999-06-29 21:45:00 Incorrect
Subject: SGP/EBBR/E26 - Left T/RH Probe Temperature Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Left T/RH probe temperature is frequently offscale during the period. Examine the data (compare with the the T/RH right temperature) to determine which times are incorrect. Replacement of the probe on 29 June 1999 solved the problem. Affected data are: 5 minute: tair_bot, tair_top 15 minute: tair_l 30 minute: tair_bot, tair_top, e, h, bowen
Measurements
  • latent_heat_flux (Latent heat flux)
  • bowen_ratio (Bowen ratio)
  • temp_air_top (Top air temperature)
  • temp_air_bottom (Bottom air temperature)
  • sensible_heat_flux (Sensible heat flux)
 
DQR ID: D980117.22    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1998-01-07 19:50:00 1998-01-08 22:30:00 Incorrect
Subject: SGP/EBBR/E26- EBBR Frozen Wind Speed
Affected Datastreams: sgp30ebbrE26.b1
Description Wind speed cups were frozen during the indicated time periods. All 5, 15, and 30 minute data values indicated are incorrect for the periods listed.
Measurements
  • wspd_vec_mean (Wind speed vector mean)
  • wspd_arith_mean (Wind speed arithmetic mean)
 
DQR ID: D000627.6    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-04-06 18:00:00 2000-06-15 16:00:00 Incorrect
Subject: SGP/EBBR/E26 - Soil Heat Flow #5 Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description Soil Heat Flow #5 was incorrect, causing the indicated measurements to be incorrect.
Measurements
  • soil_heat_flow_5 (Soil heat flow 5)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D030117.27    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-07-01 00:00:00 2002-07-11 13:00:00 Incorrect
Subject: SGP/EBBR/E26 - Multiplexer Problem
Affected Datastreams: sgp30ebbrE26.b1
Description One of the multiplexers exhibited dropouts of the channels, beginning with the last channel at temperatures above about 30 C and moving backward through the channels as the temperature rose. High temperatures affected the switching speed of the multiplexer. This is the first time that this behavior has been documented in a Campbell Scientific multiplexer. The multiplexer had been in continuous field use for 10 years and had experienced probably more switching cycles than what is normally expected of the device in that period. The multiplexer was replaced to solve the problem.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • temp_air_top (Top air temperature)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
 
DQR ID: D990421.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-04-02 16:45:00 1999-04-02 18:00:00 Incorrect
Subject: SGP/EBBR/E26 - Incorrect Data
Affected Datastreams: sgp5ebbrE26.b1
Description All data is incorrect for this time. This problem was related to changeout activities.
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • net_radiation (Net radiation)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • time_offset (Time offset from base_time)
  • soil_temp_4 (Soil temperature 4)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • soil_temp_2 (Soil temperature 2)
  • lon (East longitude)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D000622.1    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1996-07-17 00:00:00 1999-04-01 14:10:00 Suspect
Subject: SGP/EBBR/E26 - Reprocess: Soil Moisture Off-Scale
Affected Datastreams: sgp30ebbrE26.b1
Description During numerous periods within the days listed above, individual soil moisture probes indicate small positive or else negative values when soil moisture is high (greater than 35%). This situation has occured since the present EBBR unit was installed on 17 July 1996. The cause of the problem is inadequate range in the calibration curve equation. Cement soil is somewhat unique amongst the EBBR sites, as the soil is very sandy and porous; it can hold a larger amount of water per volume than the other soils. This high a soil moisture cannot be obtained with the calibration soil used by REBS. Therefore, the soil moisture equations need to be manipulated to allow larger soil moistures to be calculated. Much of the data from January 1998 is corrupted by this problem, making changes in the equations prudent. The soil moisture data must be inspected by the data user to see when soil moisture values for one or more probes is inconsistent with the others. Recalculation of ave_shf, e, and h must be made using only the soil moisture sets with correct soil moisture values. Affected data values are (# for probe number): 15 minute: rr_sm# 30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h Sensible, latent, and soil heat fluxes can be recalculated using the soil probe sets that provide correct data. For example, if soil moisture 2 is incorrect, ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), If soil moisture 2 and 4 are incorrect, ave_shf = (g1 + g3 + g5)/3 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), If soil moisture 2, 4, and 5 are incorrect, ave_shf = (g1 + g3)/2 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), etc. On 5 May 1998 at 1815 GMT a calibration coefficient was changed in the CR10 program as a result of a BCR by the mentor. This coefficient has helped reduce the least severe problems but has not eliminated problems from large negative soil moistures measured even once during the integration period. However, now the incorrect average soil heat flow, latent heat flux, and sensible heat flux are so large, negative or positive, that they cannot be mistaken as being correct. The EBBR unit was replaced with a recalibrated system on 1 April 1999. The previous unit experienced soil moisture problems the entire time (almost 3 years) that the system was installed because of the inadequacy of the soil moisture sensor calibrations.
Measurements
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • sensible_heat_flux (Sensible heat flux)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • latent_heat_flux (Latent heat flux)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D030712.23    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2003-04-17 14:45:00 2003-04-17 15:35:00 Incorrect
Subject: SGP/EBBR/E26 - 6 Month Checks
Affected Datastreams: sgp30ebbrE26.b1
Description Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)
 
DQR ID: D940301.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1993-12-01 00:00:00 1994-02-02 23:59:00 Incorrect
Subject: SGP/EBBR/E26 - Winds, SM2 Invalid data 10/10/93 - 2/2/94
Affected Datastreams: sgp30ebbrE26.b1
Description Beginning October 10, 1993 the EBBR system at E26, Cement, OK began to have problems with outputs from soil moisture sensor number 2 and the wind direction sensor. This situation also occured in early 1993 and was eliminated by replacing the soil moisture sensor (after replacing the wind direction sensor did not help). This time, replacing the soil moisture sensor did not help, but the problem has not re-occured since the wind direction sensor was replaced on February 2, 1994. During periods of bad data the wind direction output is a constant 135 degrees and soil moisture two is offscale. Invalid data for a constant wind direction of 135 degrees is: 30 minute: res_ws, wind_d, sigma_wd 15 minute: mv_wind_d 5 minute: res_ws, wind_d, sigma_wd. Invalid data for soil moisture 2 offscale is: 30 minute: sm2, c_shf2, cs2, ces2, g2, ave_shf, h, e 15 minute: r_sm2 5 minute: no data affected. Apparent cause of data loss, if known: Apparently an electronic problem in interfacing an intermittently malfunctioning wind direction sensor to the data acquisition system multiplexer, thereby affecting the other sensor (soil moisture 2) on that multiplexer pair.
Measurements
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • latent_heat_flux (Latent heat flux)
  • wspd_vec_mean (Wind speed vector mean)
 
DQR ID: D010723.7    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2000-10-21 21:30:00 2000-10-21 21:31:00 Incorrect
Subject: SGP EBBR E26 - Some Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The reference temperature sensor malfunctioned, causing all associated measurements to be incorrect.
Measurements
  • temp_air_top (Top air temperature)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • bowen_ratio (Bowen ratio)
  • sensible_heat_flux (Sensible heat flux)
  • soil_temp_2 (Soil temperature 2)
  • soil_temp_4 (Soil temperature 4)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_3 (Soil temperature 3)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_temp_1 (Soil temperature 1)
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • latent_heat_flux (Latent heat flux)
  • temp_reference (Reference temperature in enclosure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D990127.43    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
1999-01-08 03:15:00 1999-01-09 06:00:00 Suspect
Subject: SGP/EBBR - EBBR E26 Wind Speed Data Incorrect
Affected Datastreams: sgp30ebbrE26.b1
Description The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws,
Measurements
  • temp_air_top (Top air temperature)
  • soil_heat_flow_2 (Soil heat flow 2)
  • soil_heat_capacity_4 (Soil heat capacity 4)
  • soil_heat_flow_5 (Soil heat flow 5)
  • corr_soil_heat_flow_3 (Soil heat flow 3, corrected for soil moisture)
  • soil_heat_flow_3 (Soil heat flow 3)
  • surface_soil_heat_flux_4 (Surface soil heat flux 4)
  • energy_storage_change_3 (Change in energy storage 3, 0-5 cm soil layer)
  • surface_soil_heat_flux_avg (Surface soil heat flux, average of fluxes 1-5)
  • wspd_arith_mean (Wind speed arithmetic mean)
  • soil_moisture_4 (Soil moisture 4, gravimetric)
  • energy_storage_change_1 (Change in energy storage 1, 0-5 cm soil layer)
  • wspd_vec_mean (Wind speed vector mean)
  • net_radiation (Net radiation)
  • home_signal_15 (AEM position indicator 0 to 15 mins)
  • bowen_ratio (Bowen ratio)
  • soil_moisture_2 (Soil moisture 2, gravimetric)
  • wdir_vec_std (Wind direction vector mean standard deviation)
  • sensible_heat_flux (Sensible heat flux)
  • corr_soil_heat_flow_1 (Soil heat flow 1, corrected for soil moisture)
  • soil_heat_capacity_2 (Soil heat capacity 2)
  • rh_top_fraction (Top relative humidity (fractional))
  • soil_temp_2 (Soil temperature 2)
  • time_offset (Time offset from base_time)
  • lon (East longitude)
  • surface_soil_heat_flux_3 (Surface soil heat flux 3)
  • soil_temp_3 (Soil temperature 3)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • soil_temp_4 (Soil temperature 4)
  • soil_heat_capacity_3 (Soil heat capacity 3)
  • corr_soil_heat_flow_5 (Soil heat flow 5, corrected for soil moisture)
  • surface_soil_heat_flux_2 (Surface soil heat flux 2)
  • vapor_pressure_top (Top vapor pressure)
  • temp_trh_top (Top T/RH sensor temperature)
  • surface_soil_heat_flux_5 (Surface soil heat flux 5)
  • soil_moisture_3 (Soil moisture 3, gravimetric)
  • soil_temp_1 (Soil temperature 1)
  • wdir_vec_mean (Wind direction vector mean)
  • soil_heat_flow_4 (Soil heat flow 4)
  • corr_soil_heat_flow_4 (Soil heat flow 4, corrected for soil moisture)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • surface_soil_heat_flux_1 (Surface soil heat flux 1)
  • vapor_pressure_bottom (Bottom vapor pressure)
  • soil_heat_capacity_5 (Soil heat capacity 5)
  • home_signal_30 (AEM position indicator 15 to 30 mins)
  • soil_heat_flow_1 (Soil heat flow 1)
  • latent_heat_flux (Latent heat flux)
  • alt (Altitude above mean sea level)
  • lat (North latitude)
  • corr_soil_heat_flow_2 (Soil heat flow 2, corrected for soil moisture)
  • temp_reference (Reference temperature in enclosure)
  • atmos_pressure (Atmospheric pressure)
  • soil_temp_5 (Soil temperature 5)
  • energy_storage_change_2 (Change in energy storage 2, 0-5 cm soil layer)
  • energy_storage_change_4 (Change in energy storage 4, 0-5 cm soil layer)
  • soil_moisture_1 (Soil moisture 1, gravimetric)
  • base_time (Base time in Epoch)
  • soil_moisture_5 (Soil moisture 5, gravimetric)
  • soil_heat_capacity_1 (Soil heat capacity 1)
  • temp_air_bottom (Bottom air temperature)
  • energy_storage_change_5 (Change in energy storage 5, 0-5 cm soil layer)
 
DQR ID: D030110.27    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2002-11-27 16:05:00 2002-11-27 16:35:00 Incorrect
Subject: SGP/EBBR/E26 - Data Incorrect during 6 month checks
Affected Datastreams: sgp30ebbrE26.b1
Description Some of the measurements are incorrect during the 6 month checks.
Measurements
  • bowen_ratio (Bowen ratio)
  • vapor_pressure_top (Top vapor pressure)
  • temp_air_top (Top air temperature)
  • temp_trh_top (Top T/RH sensor temperature)
  • sensible_heat_flux (Sensible heat flux)
  • rh_bottom_fraction (Bottom relative humidity (fractional))
  • rh_top_fraction (Top relative humidity (fractional))
  • vapor_pressure_bottom (Bottom vapor pressure)
  • temp_trh_bottom (Bottom T/RH sensor temperature)
  • latent_heat_flux (Latent heat flux)
  • temp_air_bottom (Bottom air temperature)