SGP/EBBR/E9 - Net Radiation Incorrect

There was water in the net radiometer.  

The net radiation data was incorrect.

• Radiation, net(net_radiation)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E27 - Measurements offscale

All J-panel 4 measurements (soil heat flows, net radiation, air temperatures, home 
signals, pressure, vapor pressure) were sometimes offscale or otherwise incorrect.  J-Panel was 
replaced 20080326 correcting the problem.

• temp_air_bottom
• temp_air_top
• Radiation, net(net_radiation)
• home_signal
• Atmospheric pressure(atmos_pressure)
• vapor_pressure_top
• vapor_pressure_bottom

• soil_heat_flow_2_mv
• home_signal
• soil_heat_flow_3_mv
• soil_heat_flow_5_mv
• soil_heat_flow_4_mv
• atmos_pressure_mv
• net_radiation_mv
• temp_air_right
• soil_heat_flow_1_mv
• temp_air_left

• corr_soil_heat_flow_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• soil_heat_flow_1
• surface_soil_heat_flux_3
• soil_heat_flow_2
• surface_soil_heat_flux_4
• surface_soil_heat_flux_5
• soil_heat_flow_5
• soil_heat_flow_3
• soil_heat_flow_4
• Radiation, net(net_radiation)
• temp_air_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• home_signal_30
• Atmospheric pressure(atmos_pressure)
• home_signal_15
• temp_air_bottom
• surface_soil_heat_flux_1
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_2
• corr_soil_heat_flow_3
• corr_soil_heat_flow_4
• corr_soil_heat_flow_5

SGP/EBBR/E7  - Wind Speed Frozen Stopped

Freezing rain stopped wind speed sensor.

• Wind speed arithmetic mean(wspd_arith_mean)

• Wind speed arithmetic mean(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed vector mean(wspd_vec_mean)
• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E13 - Wind direction failure

The EBBR wind direction was stuck at 135 degrees; this reading indicates a failure of the 
sensor electronics.

• wdir_vec_mean_mv

• Wind direction vector mean(wdir_vec_mean)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)

• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)

SGP/EBBR/E20 - Wind Direction 50 Degrees High

The wind direction was offset high about 50 degrees.

• Wind direction vector mean(wdir_vec_mean)

• wdir_vec_mean_mv

• Wind direction vector mean(wdir_vec_mean)

SGP/EBBR/E4 - AEM Blown Fuse, Sensible and Latent Heat Fluxes Incorrect

The AEM Fuse was blown, the AEM was not switching, and thus sensible and latent heat flux 
measurements were incorrect.

• bowen_ratio
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

SGP/EBBR/E18 - Soil Heat Flow #4 Offscale Low; Sensible and Latent Heat Flux Sometimes 
Incorrect

Soil heat flow #4 was sometimes lower than the lower limit imposed in the EBBR 
programming; sensible and latent heat flux were therefore deemed to be suspect during those times.  
The cause of the low values is not clear, but the values are not reasonable for the 
vegetation type at EF18.

• soil_heat_flow_4_mv

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_1
• corr_soil_heat_flow_4
• soil_heat_flow_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_4
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E8 - Wind Direction Incorrect

The wind direction flatlined at times at 135 degrees (an indication of failed electronics) 
and at other times trended correctly with the co-located SMOS but differed from it by 15 
to 100 degrees.

• wdir_vec_mean_mv

• Wind direction vector mean(wdir_vec_mean)
• wdir_vec_std

• Wind direction vector mean(wdir_vec_mean)
• wdir_vec_std

SGP/EBBR/E2 - Net Radiation and Fluxes Incorrect

The net radiometer was tipped 37 degrees eastward, resulting in apparent
solar noon being 2.5 hours early.  The net radiation error results in incorrect sensible 
and latent heat fluxes.

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Radiation, net(net_radiation)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E19 - Sensible and latent heat flux and net radiation incorrect

Net radiation was too large, resulting in sensible and latent heat fluxes being too large. 
 The cause of the problem is unknown.

• net_radiation_mv

• Radiation, net(net_radiation)

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Radiation, net(net_radiation)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

SGP/EBBR/E2 - AEM Ventilator Dangling - Sensible and Latent Heat Fluxes Incorrect

The right AEM ventilator unit with temperature and humidity sensors inside was dangling 
from the AEM.  Therefore, the gradients of temperature and relative humidity and thus 
sensible and latent heat flux are suspect for this period.  Often, the fluxes look reasonable.

• vapor_pressure_top
• temp_air_bottom
• rh_bottom_fraction
• bowen_ratio
• rh_top_fraction
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• temp_air_top
• vapor_pressure_bottom
• temp_trh_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_bottom

• temp_air_right
• rh_right_mv
• temp_trh_right_rr

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

SGP/EBBR/E15 - Water in dome

There was water in the bottom dome of the net radiometer.

Net radiation, and sensible and latent heat fluxes were 
incorrect during the period.

• Radiation, net(net_radiation)

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Radiation, net(net_radiation)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• net_radiation_mv

SGP/EBBR/E15 - Soil Heat Flow #4 Incorrect

Soil heat flux #4 produced too large a soil heat flow at times, resulting in it exceeding 
the qc check limit and causing sensible and latent heat fluxes to be incorrect.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_4
• corr_soil_heat_flow_4
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_heat_flow_4

• soil_heat_flow_4_mv

SGP/EBBR/E18 - SHF #4 Measurements Too Low; Sensible and Latent Heat Fluxes Suspect

Soil heat flow #4 was replaced at the beginning of this period.  However, the soil heat 
flow measurements from that sensor were sometimes still lower than the lower limit imposed 
in the EBBR programming; sensible and latent heat flux were therefore deemed to be 
suspect during those times.  The cause of the low values could not be determined, but the 
values are not reasonable for the vegetation type at EF18.  

To remedy the situation, the soil heat flow sensor calibration was changed so that the 
sensor provided measurements that resembled the other four soil heat flow sensor 
measurements.

Soil heat flow measurements have been reasonable since the calibration change.

• soil_heat_flow_4_mv

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_4
• soil_heat_flow_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_4
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - Wind Direction Incorrect

The wind direction differed from the co-located SMOS by 50 deg during part of the stated 
period and the electronics had failed completely resulting in a constant 135 degrees for 
the following dates and times:
08/15 0230-0430, 0830-1530 and 09/03 0200-0300, 0500 - 09/10 2230.

Sensible and latent heat fluxes were not affected by this problem.

• Wind speed vector mean(wspd_vec_mean)
• Wind direction vector mean(wdir_vec_mean)
• wdir_vec_std

• wdir_vec_mean_mv

• Wind direction vector mean(wdir_vec_mean)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)

SGP/EBBR/E4 - Wind Direction 20 Degrees Low

The wind direction was too low by 20 degrees low.

• Wind direction vector mean(wdir_vec_mean)

• Wind direction vector mean(wdir_vec_mean)

• wdir_vec_mean_mv

SGP/EBBR/E8 - RH Maximum too high

The absolute RH measurements were too high for RH > 100%. Use of first
(instead of second order) coefficients was no improvement.

The calculated sensible and latent heat fluxes were unaffected.

• rh_right_mv
• rh_left_mv

• rh_bottom_fraction
• rh_top_fraction

• rh_bottom_fraction
• rh_top_fraction