SGP/EBBR/E7  - Reference Temperature Failure

The reference T sensor was not working, affecting 
other temperature sensors.  Sensible and latent heat fluxes
were incorrect when this occurred.

• temp_air_left
• temp_air_right

• temp_air_top
• temp_air_bottom

• latent_heat_flux
• sensible_heat_flux
• temp_air_bottom
• bowen_ratio
• temp_air_top

SGP/EBBR/E7 - 6 Month Checks

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

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

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

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

SGP/EBBR/E7 - Wind Speed Sensor Frozen By Ice Storm

The wind speed sensor was frozen stopped by ice.  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/E7 - Pressure Sensor Data Incorret

The E7 pressure sensor suffered
from spikes in pressure, which were related to 
increases in voltage during the day as the 
solar panels charged the battery.  These spikes
were not of a magnitude that would affect the 
30 minute surface fluxes.

Replacement of the pressure sensor solved the problem.

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E7  - Wind Speed Frozen Stopped By Ice

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/E7 - Tref Problem Causes All Temps. to be Incorrect

The Tref sensor went crazy for this brief period, making all temperature
measurements incorrect.

• temp_air_left
• temp_air_right

• temp_air_top
• temp_reference
• temp_air_bottom
• temp_trh_top
• temp_trh_bottom

• soil_temp_2
• temp_trh_bottom
• soil_temp_3
• temp_trh_top
• temp_air_bottom
• soil_temp_1
• soil_temp_4
• soil_temp_5
• temp_reference
• temp_air_top

SGP/EBBR/E7 - Pressure Too High

When data collection resumed after a missing period, the barometer pressure
had become very high, 102 kPa, which was not correct.  This condition resulted
from an incorrect calibration being used. Sensible heat flux was overestimated 
by about 4% and latent heat flux underestimated by about 4% because of the 
high pressure readings.

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

• latent_heat_flux
• Barometric Pressure(atmos_pressure)
• sensible_heat_flux
• bowen_ratio

SGP/EBBR/E7 - Data Missing

A power outage resulted in missing data for the indicated period.

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

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

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

SGP/EBBR/E7 - 6 Month Checks

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

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

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

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

SGP/EBBR/E7  - 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/E7  - 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/E7 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E7 data collected by ARM back to the installation of the 
instrument in May 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 moisture units (from "by volume" to "gravimetric")

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry

The output precision of the following variables was increased 20060928

alt  changed from 1m to 0.1m
dp   changed from 0.1degC to 0.01degC
pres changed from 0.1 hPa to 0.01 hPa
RH   changed from 1%RH to 0.01%RH
tdry changed from .1degC to 0.01degC

Note that the increase in precision does not necessarily imply an increase in accuracy.  
Users are cautioned to continue to use their best scientific judgement when using these or 
any other data.

• Surface dew point temperature(dp)
• Dry bulb temperature(tdry)
• Relative humidity inside the instrument enclosure(rh)
• Retrieved pressure profile(pres)
• Dummy altitude for Zeb(alt)