SGP/EBBR - EBBR E12 Anemometer Cups Frozen, Wind Speed Incorrect

The anemometer cups were frozen stalled 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

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR - EBBR E12 Net Radiation Incorrect

Condensation inside the domes (possibly water in the bottom dome also) 
during the period made daytime net radiation values as much as 50% too 
large and nighttime net radiations as much as 100% too small.  

The affected data are:

5 minute:  q
15 minute: mv_q
30 minute: q, h, e

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation_mv

• net_radiation

SGP/EBBR - EBBR E12 Net Radiation Incorrect

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

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation_mv

• net_radiation

SGP/EBBR/E12 - EBBR E12 Wind Speed Iced

The anemometer was frozen stopped by freezing rain; the indicated data is incorrect.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12 - EBBR E12 Wind Speed Iced

The anemometer was frozen stopped by freezing rain; the indicated data is incorrect.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12 - E12 EBBR Wind Direction Incorrect

The wind direction vane was frozen stopped in one direction by icing.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12 - E12 EBBR Wind Speed Incorrect

The wind speed sensor cups were frozen stopped by icing.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12 - E12 EBBR AEM Stuck - Data Incorrect

The AEM became stuck between levels, causing all gradient measurements to be incorrect, 
and thus the latent and sensible heat fluxes and Bowen ratio.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP EBBR E12 - E12 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• net_radiation
• soil_heat_capacity_2
• soil_heat_capacity_1
• rh_bottom_fraction
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• surface_soil_heat_flux_avg
• temp_trh_bottom
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• energy_storage_change_4
• rh_top_fraction
• bowen_ratio
• soil_temp_5
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• soil_temp_2
• soil_temp_1
• latent_heat_flux
• wdir_vec_std
• vapor_pressure_bottom
• wspd_arith_mean
• soil_heat_flow_5
• vapor_pressure_top
• surface_soil_heat_flux_1
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_2
• energy_storage_change_2
• temp_air_top
• temp_trh_top
• temp_reference
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_moisture_5
• Barometric Pressure(atmos_pressure)
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• soil_temp_3_rr
• atmos_pressure_mv
• temp_reference_rr
• soil_moisture_2_r
• soil_moisture_4_r
• soil_heat_flow_2_mv
• soil_moisture_5_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• wspd_arith_mean
• temp_air_right
• soil_heat_flow_4_mv
• rh_right_mv
• soil_moisture_3_rr
• temp_trh_right_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• soil_temp_2_rr
• soil_temp_4_rr
• temp_trh_left_rr
• soil_heat_flow_1_mv
• rh_left_mv
• soil_moisture_2_rr
• soil_moisture_3_r
• temp_air_left
• soil_moisture_1_r
• soil_temp_1_rr
• soil_temp_5_rr
• soil_moisture_5_r
• net_radiation_mv
• soil_heat_flow_3_mv

• wdir_vec_std
• temp_trh_top
• rh_bottom_fraction
• temp_air_top
• wspd_vec_mean
• wdir_vec_mean
• net_radiation
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• wspd_arith_mean
• temp_reference
• vapor_pressure_top
• rh_top_fraction
• temp_air_bottom
• temp_trh_bottom

SGP EBBR E12 - E12 EBBR Data Incorrect From AEM In One Position

The AEM kept stopping in one position. Offset biases are not removed from the 
gradient data in this situation and the data indicated is therefore incorrect.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - 3-month Check

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.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - T/RH Check

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:  1515, 1520, 1525, 1530, 1535, 1540, 1545, 1550, 1555,
           1600, 1605, 1610
15 minute: 1515, 1530, 1545, 1600, 1615
30 minute: 1530, 1600, 1630

(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.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

• temp_air_left
• temp_air_right

• bowen_ratio
• temp_air_top
• vapor_pressure_top
• latent_heat_flux
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_bottom_fraction
• rh_top_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_air_top
• temp_trh_top
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• temp_air_bottom

SGP/EBBR/E12 - AEM Hung

The automatic exchange mechanism did not exchange properly, causing other measurements to 
be incorrect.

• temp_air_left
• temp_air_right

• bowen_ratio
• temp_air_top
• vapor_pressure_top
• latent_heat_flux
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_bottom_fraction
• rh_top_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_air_top
• temp_trh_top
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• temp_air_bottom

SGP/EBBR/E12 - Measurements Incorrect

All measurements were incorrect or offscale for an unknown reason.

• net_radiation
• soil_heat_capacity_2
• soil_heat_capacity_1
• rh_bottom_fraction
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• surface_soil_heat_flux_avg
• temp_trh_bottom
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• energy_storage_change_4
• rh_top_fraction
• bowen_ratio
• soil_temp_5
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• soil_temp_2
• soil_temp_1
• latent_heat_flux
• wdir_vec_std
• vapor_pressure_bottom
• wspd_arith_mean
• soil_heat_flow_5
• vapor_pressure_top
• surface_soil_heat_flux_1
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• home_signal_30
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_2
• energy_storage_change_2
• temp_air_top
• temp_trh_top
• temp_reference
• home_signal_15
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_moisture_5
• Barometric Pressure(atmos_pressure)
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• soil_temp_3_rr
• atmos_pressure_mv
• temp_reference_rr
• soil_heat_flow_2_mv
• soil_moisture_5_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• wspd_arith_mean
• temp_air_right
• soil_heat_flow_4_mv
• battery_voltage
• rh_right_mv
• soil_moisture_3_rr
• temp_trh_right_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• soil_temp_2_rr
• soil_temp_4_rr
• home_signal
• temp_trh_left_rr
• soil_heat_flow_1_mv
• rh_left_mv
• soil_moisture_2_rr
• temp_air_left
• soil_temp_1_rr
• soil_temp_5_rr
• net_radiation_mv
• soil_heat_flow_3_mv

• null(Raw data stream - documentation not supported)

• wdir_vec_std
• temp_trh_top
• rh_bottom_fraction
• temp_air_top
• wspd_vec_mean
• wdir_vec_mean
• net_radiation
• home_signal
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• wspd_arith_mean
• temp_reference
• vapor_pressure_top
• rh_top_fraction
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E12 - Resistance Measurements Incorrect

All sensors that depend on resistance measurements are incorrect.
Average soil heat flow, sensible heat flux, and latent heat flux are incorrect as a 
result.

This condition normally occurs when the reference temperature sensor is disconnected or 
bad.

• temp_air_left
• temp_air_right

• vapor_pressure_bottom
• vapor_pressure_top
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_1
• soil_heat_capacity_5
• energy_storage_change_2
• soil_heat_capacity_4
• soil_heat_capacity_3
• temp_air_top
• surface_soil_heat_flux_avg
• temp_trh_bottom
• temp_trh_top
• energy_storage_change_5
• temp_reference
• energy_storage_change_3
• energy_storage_change_4
• bowen_ratio
• corr_soil_heat_flow_1
• soil_temp_5
• corr_soil_heat_flow_2
• soil_temp_4
• corr_soil_heat_flow_3
• soil_temp_3
• corr_soil_heat_flow_4
• soil_temp_2
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_temp_1
• latent_heat_flux
• soil_moisture_5
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• temp_trh_top
• vapor_pressure_bottom
• temp_air_top
• vapor_pressure_top
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E12 - Reprocess: Soil Temperature #3 Incorrect

Soil Temperature #3 was flaky primarily during nighttime hours and sometimes during early 
daylight hours.  Average soil heat flow, sensible heat flux, and latent heat flux are 
also affected; these can be recalculated using the remaining good sets of soil sensors as 
follows:

The heat fluxes can be recalculated by using soil sets 1, 2, 4, and 5 as follows:
     ave_shf = (g1 + g2 + g4 + g5)/4
     e = -(q + ave_shf)/(1 + bowen)
     h = -(q + e + ave_shf)

• surface_soil_heat_flux_avg
• energy_storage_change_3
• soil_temp_3
• latent_heat_flux
• sensible_heat_flux
• surface_soil_heat_flux_3

SGP/EBBR/E12 - Wind Direction Incorrect

The wind direction measurement was zero, in the 50s, or always less than 180 degrees.

A DQPR has been issued to resolve the problem.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wspd_arith_mean
• wdir_vec_std
• wspd_vec_mean

SGP/EBBR/E12 - Reprocess: Soil Moisture 4 and 5 Incorrect

Soil moisture measurements from sets 4 and 5 were incorrect, leading to many other 
incorrect measurements calculated using them.

Average soil heat flow, sensible heat flux, and latent heat flux are affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:
    ave_shf = (g1 + g2 + g3)/3
    e = -(q + ave_shf)/(1 + bowen)
    h = -(q + e + ave_shf)

Note:  D020717.6 reports Soil temperature sensor #3 was also bad during this
time, but for the very specific records affected by the soil moisture #4 and
#5 reporting incorrectly, soil temp #3 was okay.  Therefore the equations
given are correct.

• soil_heat_capacity_5
• surface_soil_heat_flux_avg
• corr_soil_heat_flow_4
• soil_heat_capacity_4
• corr_soil_heat_flow_5
• latent_heat_flux
• surface_soil_heat_flux_4
• soil_moisture_5
• surface_soil_heat_flux_5
• soil_moisture_4
• sensible_heat_flux

SGP/EBBR/E12 - Reprocess: Soil Moisture 2 and 5 Incorrect

Soil moisture measurements from sets 2 and 5 were incorrect, leading to many other 
incorrect measurements calculated using them.

Average soil heat flow, sensible heat flux, and latent heat flux are affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:
    ave_shf = (g1 + g3 + g4)/3
    e = -(q + ave_shf)/(1 + bowen)
    h = -(q + e + ave_shf)

Note:  D020717.6 reports Soil temperature sensor #3 was also bad during this
time, but for the very specific records affected by the soil moisture #2 and
#5 reporting incorrectly, soil temp #3 was okay.  Therefore the equations
given are correct.

• soil_heat_capacity_2
• corr_soil_heat_flow_2
• soil_heat_capacity_5
• surface_soil_heat_flux_avg
• corr_soil_heat_flow_5
• latent_heat_flux
• soil_moisture_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• sensible_heat_flux
• soil_moisture_2

SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR 
Header

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.

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_5
• soil_heat_capacity_4

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_3
• soil_heat_capacity_4

• soil_heat_capacity_5
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_1

• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_1

SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR 
Header

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.)

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_3
• soil_heat_capacity_4

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1

• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2

• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_1

• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• soil_heat_capacity_1

SGP/EBBR/E12 - Data Incorrect during 6 month checks

Some of the measurements are incorrect during the 6 month checks.

• temp_air_left
• temp_air_right

• bowen_ratio
• temp_air_top
• vapor_pressure_top
• latent_heat_flux
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_bottom_fraction
• rh_top_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_air_top
• temp_trh_top
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• temp_air_bottom

SGP/EBBR/E12 - Resistance-based Measurements Incorrect

When the Reference Temperature in the EBBR 
enclosure is not reported correctly, it
affects all resistance-based measurements
that are adjusted with the temperature of 
the reference junction.

• temp_air_right
• temp_air_left
• temp_reference_rr

• temp_air_top
• surface_soil_heat_flux_avg
• vapor_pressure_bottom
• energy_storage_change_5
• energy_storage_change_3
• temp_reference
• energy_storage_change_4
• corr_soil_heat_flow_1
• bowen_ratio
• corr_soil_heat_flow_2
• soil_temp_5
• corr_soil_heat_flow_3
• soil_temp_4
• corr_soil_heat_flow_4
• soil_temp_3
• corr_soil_heat_flow_5
• soil_temp_2
• soil_temp_1
• soil_moisture_1
• surface_soil_heat_flux_1
• latent_heat_flux
• vapor_pressure_top
• surface_soil_heat_flux_4
• soil_moisture_5
• surface_soil_heat_flux_5
• soil_moisture_4
• surface_soil_heat_flux_2
• soil_moisture_3
• surface_soil_heat_flux_3
• soil_moisture_2
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_1
• energy_storage_change_2
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• temp_air_bottom
• sensible_heat_flux

• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_reference
• vapor_pressure_top

SGP/EBBR/E12 - Wind Direction Incorrect

The wind direction and residual wind speed measurements are incorrect.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12 - Data zero following Logger Restart

Most of the measurements were zero, which normally happens after a 
datalogger restart.  The restart on 08/16/02 occurred after an EBBR
unit changeout.

• net_radiation
• soil_heat_capacity_2
• soil_heat_capacity_1
• rh_bottom_fraction
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• surface_soil_heat_flux_avg
• temp_trh_bottom
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• energy_storage_change_4
• rh_top_fraction
• bowen_ratio
• soil_temp_5
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• soil_temp_2
• soil_temp_1
• latent_heat_flux
• wdir_vec_std
• vapor_pressure_bottom
• soil_heat_flow_5
• vapor_pressure_top
• surface_soil_heat_flux_1
• soil_heat_flow_4
• soil_heat_flow_3
• home_signal_30
• surface_soil_heat_flux_4
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_2
• energy_storage_change_2
• temp_air_top
• temp_trh_top
• temp_reference
• home_signal_15
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_moisture_5
• Barometric Pressure(atmos_pressure)
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• soil_temp_3_rr
• atmos_pressure_mv
• temp_reference_rr
• soil_heat_flow_2_mv
• soil_moisture_5_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• wspd_arith_mean
• temp_air_right
• soil_heat_flow_4_mv
• battery_voltage
• rh_right_mv
• soil_moisture_3_rr
• temp_trh_right_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• soil_temp_2_rr
• soil_temp_4_rr
• home_signal
• temp_trh_left_rr
• soil_heat_flow_1_mv
• rh_left_mv
• soil_moisture_2_rr
• temp_air_left
• soil_temp_1_rr
• soil_temp_5_rr
• net_radiation_mv
• soil_heat_flow_3_mv

• wdir_vec_std
• temp_trh_top
• rh_bottom_fraction
• temp_air_top
• wspd_vec_mean
• wdir_vec_mean
• net_radiation
• home_signal
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• wspd_arith_mean
• temp_reference
• vapor_pressure_top
• rh_top_fraction
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E12 - Battery Voltage Low

Normally, when Battery Voltage drops below 10.5 volts, most 
measurements are suspect and some are often incorrect.
In this particular case, some of the data is suspect when
the battery voltage is below 11.0 volts.

Soil Heat Flow #3 is normally affected first, with other 
measurements following at lower voltages.

• temp_air_left
• wspd_arith_mean
• temp_air_right

• vapor_pressure_bottom
• net_radiation
• wspd_arith_mean
• surface_soil_heat_flux_1
• vapor_pressure_top
• soil_heat_flow_5
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• home_signal_30
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_1
• soil_heat_flow_1
• energy_storage_change_2
• soil_heat_capacity_5
• soil_heat_flow_2
• rh_bottom_fraction
• soil_heat_capacity_4
• soil_heat_capacity_3
• temp_air_top
• surface_soil_heat_flux_avg
• temp_trh_bottom
• temp_trh_top
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• temp_reference
• energy_storage_change_4
• rh_top_fraction
• home_signal_15
• corr_soil_heat_flow_1
• bowen_ratio
• corr_soil_heat_flow_2
• soil_temp_5
• corr_soil_heat_flow_3
• soil_temp_4
• corr_soil_heat_flow_4
• wdir_vec_mean
• soil_temp_3
• corr_soil_heat_flow_5
• soil_temp_2
• soil_temp_1
• soil_moisture_1
• latent_heat_flux
• Barometric Pressure(atmos_pressure)
• soil_moisture_5
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• wdir_vec_std
• temp_air_bottom
• sensible_heat_flux

• home_signal
• wdir_vec_std
• Barometric Pressure(atmos_pressure)
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_top
• wspd_vec_mean
• temp_reference
• vapor_pressure_top
• wdir_vec_mean
• rh_top_fraction
• temp_air_bottom
• net_radiation
• temp_trh_bottom

SGP/EBBR/E12 - AEM Stuck in One Position

When the AEM (Automatic Exchange Mechanism) is hung 
at a home position, the gradients of temperature and 
relative humidity, and thus sensible and latent heat fluxes, 
are incorrect.

• bowen_ratio
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E12 - REPROCESS: Net Rad Calibration Coefficients

The Net Radiometer coefficients were incorrect in the CR10
program when the replacement EBBR unit was installed on
08/16/02.

The data can be easily corrected; see the Suggestion area below.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E12 - Data Mostly Zero Following Logger Restart

Most of the measurements were zero, which normally happens after a 
datalogger restart.

The restart on 12/10/02 occurred after a CR10
program change of net radiometer coefficients 
and subsequent restart of the CR10.

• net_radiation
• soil_heat_capacity_2
• soil_heat_capacity_1
• rh_bottom_fraction
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• surface_soil_heat_flux_avg
• temp_trh_bottom
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• energy_storage_change_4
• rh_top_fraction
• bowen_ratio
• soil_temp_5
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• soil_temp_2
• soil_temp_1
• latent_heat_flux
• wdir_vec_std
• vapor_pressure_bottom
• wspd_arith_mean
• soil_heat_flow_5
• vapor_pressure_top
• surface_soil_heat_flux_1
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• home_signal_30
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_2
• energy_storage_change_2
• temp_air_top
• temp_trh_top
• temp_reference
• home_signal_15
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_moisture_5
• Barometric Pressure(atmos_pressure)
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• soil_temp_3_rr
• atmos_pressure_mv
• temp_reference_rr
• soil_heat_flow_2_mv
• soil_moisture_5_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• wspd_arith_mean
• temp_air_right
• soil_heat_flow_4_mv
• battery_voltage
• rh_right_mv
• soil_moisture_3_rr
• temp_trh_right_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• soil_temp_2_rr
• soil_temp_4_rr
• home_signal
• temp_trh_left_rr
• soil_heat_flow_1_mv
• rh_left_mv
• soil_moisture_2_rr
• temp_air_left
• soil_temp_1_rr
• soil_temp_5_rr
• net_radiation_mv
• soil_heat_flow_3_mv

• wdir_vec_std
• temp_trh_top
• rh_bottom_fraction
• temp_air_top
• wspd_vec_mean
• wdir_vec_mean
• net_radiation
• home_signal
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• wspd_arith_mean
• temp_reference
• vapor_pressure_top
• rh_top_fraction
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E12 - AEM Hung Inbetween Home Positions

The AEM was hung inbetween home positions, causing many measurements to be incorrect.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 -  6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12  - Water in Net Radiometer, Surface Fluxes Incorrect

The net radiometer top dome was punctured by migrating birds.  This alone does not cause 
incorrect net radiation measurements.  However, when it subsequently rains, water collects 
in the bottom dome, causing the net radiation measurements to be too large during the 
day and too small at night.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation_mv

• net_radiation

SGP/EBBR/E12 - Pressure Sensor Measurement Scales With Battery Voltage

The barometer output was scaling with supply voltage (i.e. it 
               followed the charging of the battery by the solar panel).

               NOTE: The barometer was replaced later than the end date of 
               this DQR.  Why the problem ended on 26 Nov 2003 is unclear; 
               there was no site ops intervention on that date.

               The problem did not affect the sensible and latent heat flux 
               calculations beyond the expected system error.

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E12 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - Pressure Sensor Measurement Scales With Battery Voltage

The barometer output scaled with supply voltage (it followed the charging of the battery 
by the solar panel).

The problem did not affect the sensible and latent heat flux calculations
beyond the expected system error.

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E12  - Wind Speed Sensor Frozen By Ice Storm

The wind speed sensor was frozen stopped by ice from a storm.  The wind speed 
and residual wind speed measurements are incorrect.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12  - Wind Direction Frozen Stopped By Ice

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12 - Incorrect Times

The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the 
clock was corrected by -5600.177269 seconds on March 10th at 22:47 GMT. The recorded times 
for observations are off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds 
on March 10th.

• net_radiation
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_5
• rh_bottom_fraction
• soil_heat_capacity_4
• soil_heat_capacity_3
• surface_soil_heat_flux_avg
• temp_trh_bottom
• wspd_vec_mean
• energy_storage_change_5
• energy_storage_change_3
• energy_storage_change_4
• rh_top_fraction
• Time offset of tweaks from base_time(time_offset)
• bowen_ratio
• soil_temp_5
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• soil_temp_2
• soil_temp_1
• latent_heat_flux
• wdir_vec_std
• vapor_pressure_bottom
• wspd_arith_mean
• surface_soil_heat_flux_1
• vapor_pressure_top
• soil_heat_flow_5
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• home_signal_30
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• energy_storage_change_1
• soil_heat_flow_1
• energy_storage_change_2
• soil_heat_flow_2
• temp_air_top
• temp_trh_top
• temp_reference
• home_signal_15
• corr_soil_heat_flow_1
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5
• soil_moisture_1
• soil_moisture_5
• base time(base_time)
• Barometric Pressure(atmos_pressure)
• soil_moisture_4
• soil_moisture_3
• soil_moisture_2
• temp_air_bottom
• sensible_heat_flux

• soil_temp_3_rr
• atmos_pressure_mv
• temp_reference_rr
• soil_heat_flow_2_mv
• soil_moisture_5_rr
• soil_heat_flow_5_mv
• soil_moisture_4_rr
• wspd_arith_mean
• temp_air_right
• soil_heat_flow_4_mv
• battery_voltage
• rh_right_mv
• soil_moisture_3_rr
• temp_trh_right_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• soil_temp_2_rr
• soil_temp_4_rr
• home_signal
• soil_heat_flow_1_mv
• temp_trh_left_rr
• base time(base_time)
• rh_left_mv
• soil_moisture_2_rr
• temp_air_left
• soil_temp_1_rr
• soil_temp_5_rr
• net_radiation_mv
• soil_heat_flow_3_mv
• Time offset of tweaks from base_time(time_offset)

• 0-5 cm integrated soil temperature, site 5(ts5)
• 0-5 cm integrated soil temperature, site 4(ts4)
• 0-5 cm integrated soil temperature, site 3(ts3)
• 0-5 cm integrated soil temperature, site 2(ts2)
• 0-5 cm integrated soil temperature, site 2(ts1)
• bottom vapor pressure(vp_bot)
• Top humidity(hum_top)
• 5 cm soil heat flow corrected for soil moisture content, site 2(c_shf2)
• 5 cm soil heat flow corrected for soil moisture content, site 3(c_shf3)
• Aerodynamic Sensible heat flux(ah)
• 5 cm soil heat flow corrected for soil moisture content, site 1(c_shf1)
• 0-5 cm change in soil heat storage with time, site 5(ces5)
• 0-5 cm change in soil heat storage with time, site 4(ces4)
• 0-5 cm change in soil heat storage with time, site 3(ces3)
• 0-5 cm change in soil heat storage with time, site 2(ces2)
• 0-5 cm change in soil heat storage with time, site 2(ces1)
• Reference Thermistor Temperature(tref)
• top vapor pressure(vp_top)
• Exchange mechanism position indicator (15 to 30 min)(home_30)
• Time offset of tweaks from base_time(time_offset)
• ratio of sensible/latent heat fluxes (Bowen ratio)(bowen)
• Temperature of bottom humidity sensor chamber(thum_bot)
• Temperature of the top humidity chamber(thum_top)
• vector wind speed(res_ws)
• Bottom humidity(hum_bot)
• standard deviation of wind direction (sigma theta)(sigma_wd)
• h(h)
• latent heat flux(e)
• 5 cm soil heat flow corrected for soil moisture content, site 5(c_shf5)
• 5 cm soil heat flow corrected for soil moisture content, site 4(c_shf4)
• base time(base_time)
• Aerodynamic Latent heat flux(ale)
• average surface soil heat flow(ave_shf)
• net radiation(q)
• Best estimate Sensible heat flux(hcomb)
• bottom air temperature(tair_bot)
• soil heat flow, site 1(g1)
• soil heat flow, site 4(g4)
• soil heat flow, site 5(g5)
• soil heat flow, site 2(g2)
• soil heat flow, site 3(g3)
• 5 cm soil heat flow, site 1(shf1)
• 5 cm soil heat flow, site 2(shf2)
• 5 cm soil heat flow, site 3(shf3)
• 5 cm soil heat flow, site 4(shf4)
• 5 cm soil heat flow, site 5(shf5)
• Soil heat capacity 2(cs2)
• Soil heat capacity 1(cs1)
• Soil heat capacity 4(cs4)
• Soil heat capacity 3(cs3)
• Soil heat capacity 5(cs5)
• volumetric soil moisture, site 1(sm1)
• volumetric soil moisture, site 2(sm2)
• wind direction (relative to true north)(wind_d)
• top air temperature(tair_top)
• Estimated height of the vegetation.(vegetation_height)
• Exchange mechanism position indicator (0 to 15 min)(home_15)
• Retrieved pressure profile(pres)
• volumetric soil moisture, site 5(sm5)
• volumetric soil moisture, site 3(sm3)
• volumetric soil moisture, site 4(sm4)
• scalar wind speed(wind_s)
• Friction velocity(austar)
• Best estimate Latent heat flux(ecomb)

• null(Raw data stream - documentation not supported)

• wdir_vec_std
• temp_trh_top
• rh_bottom_fraction
• base time(base_time)
• temp_air_top
• wspd_vec_mean
• wdir_vec_mean
• net_radiation
• home_signal
• Barometric Pressure(atmos_pressure)
• vapor_pressure_bottom
• wspd_arith_mean
• temp_reference
• vapor_pressure_top
• rh_top_fraction
• Time offset of tweaks from base_time(time_offset)
• time(time)
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E12 - 6 Month Checks

Many measurements were incorrect while the AEM was positioned with both aspirators at the 
same height for comparison checks.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - AEM home_15 Incorrect, Flux Measurements not affected

The home_15 measurement was incorrect during much of the stated period.
The AEM was exchanging however, and thus the flux measurements were not affected.

• home_signal

• home_signal_15

• home_signal

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice Storm

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12  - Wind Direction Frozen Stopped By Ice Storm

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean

SGP/EBBR/E12  - Wind Direction Frozen Stopped By Ice

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12 - Wind Speed and Direction Frozen by Ice Storm

The wind speed and direction sensors were frozen by ice from and ice storm.

• wspd_vec_mean
• wspd_arith_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv
• wspd_arith_mean

• wspd_arith_mean
• wdir_vec_std
• wspd_vec_mean
• wdir_vec_mean

SGP/EBBR/E12 - Improved EBBR CR10 Program

Effective 20050329.1830, the EBBR.E12 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 20050329, 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 sgp30ebbrE12.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE12.a1).

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E12 - Average Soil Heat Flux Incorrect

A typo in the version 9 EBBR program caused average soil heat flow to be zero, resulting 
in both sensible and latent heat fluxes being approximately 20 watts per meter squared too 
large during the middle of the day.

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E12 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E12 data collected by ARM back to the installation of the 
instrument in August 1993. 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 type
4) Correction of soil moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/EBBR/E12 - Sensible and Latent Heat Fluxes Incorrect at Times

Large spikes in soil temperature #2 are causing the soil heat storage
term to blow up, and thus the average soil heat flow, sensible heat flux, 
and latent heat flux to be incorrect at times.

• soil_temp_2_rr

• energy_storage_change_2
• surface_soil_heat_flux_avg
• latent_heat_flux
• surface_soil_heat_flux_2
• sensible_heat_flux

SGP/EBBR/E12 - Multiplexer failure

Sensible and latent heat fluxes are incorrect during a period when multiplexer #2 
experienced a failure.

• temp_air_right
• temp_air_left

• temp_air_top
• surface_soil_heat_flux_avg
• vapor_pressure_bottom
• net_radiation
• soil_moisture_1
• surface_soil_heat_flux_1
• vapor_pressure_top
• latent_heat_flux
• soil_heat_flow_5
• soil_heat_flow_4
• soil_heat_flow_3
• surface_soil_heat_flux_4
• Barometric Pressure(atmos_pressure)
• soil_moisture_5
• surface_soil_heat_flux_5
• soil_moisture_4
• surface_soil_heat_flux_2
• soil_moisture_3
• surface_soil_heat_flux_3
• soil_moisture_2
• soil_heat_flow_1
• soil_heat_flow_2
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• Barometric Pressure(atmos_pressure)
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• net_radiation
• vapor_pressure_top

SGP/EBBR/E12 - Fluxes and Gradient Measurements Incorrect

The AEM hung in one position; therefore the fluxes and gradient measurements were 
incorrect.

• temp_air_right
• temp_trh_left_rr
• rh_left_mv
• rh_right_mv
• temp_air_left
• temp_trh_right_rr

• temp_air_top
• vapor_pressure_bottom
• temp_trh_bottom
• temp_trh_top
• rh_top_fraction
• bowen_ratio
• latent_heat_flux
• vapor_pressure_top
• rh_bottom_fraction
• temp_air_bottom
• sensible_heat_flux

• rh_top_fraction
• temp_trh_top
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• vapor_pressure_top

SGP/EBBR/E12 - Net Radiation, and Sensible and Latent Heat Fluxes Incorrect

Rain entered into the net radiometer through a broken top dome.  Most of the net radiation 
values during the period are much too large, thus sensible and latent fluxes are also 
too large.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation_mv

• net_radiation

SGP/EBBR/E12 - Soil Temperature #1 Incorrect

During much of this period soil temperature #1 was offscale or erratic.
Sensible and latent heat fluxes were not ususally affected.

• soil_temp_1_rr

• soil_heat_capacity_1
• energy_storage_change_1
• soil_temp_1
• surface_soil_heat_flux_1

SGP/EBBR/E12 - Wind Speed Incorrect

The wind speed sensor was stopped by freezing rain.

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean
• wspd_vec_mean