SGP/EBBR/E26 - Wind Speed Iced

The anemometer was frozen stopped by freezing rain.  Indicated data are incorrect.

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

• Wind speed arithmetic mean(wspd_arith_mean)

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

SGP/EBBR/E22 - EBBR E22 Wind Speed Iced

The anemometer was frozen stopped by freezing rain.  Indicated data is incorrect.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP EBBR E22 - E22 EBBR Soil Moisture Lower Than Measurement Capability

The indicated measurements were incorrect because soil moisture dropped below (sometimes 
even negative) the ability of the probes to measure it.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_moisture_5
• energy_storage_change_1
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_rr
• soil_moisture_1_r
• soil_moisture_5_r
• soil_moisture_3_rr
• soil_moisture_4_rr
• soil_moisture_2_r
• soil_moisture_5_rr
• soil_moisture_2_rr

SGP EBBR E22 - E22 EBBR Soil Moisture #3 Lower Than Can Be Measured

The soil moisture was too low to be measured correctly by probe #3.

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• energy_storage_change_3
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_3
• soil_moisture_3

• soil_moisture_3_rr
• soil_moisture_3_r

SGP EBBR E22 - E22 EBBR Net Radiation Incorrect

Water inside the domes of the net radiometer caused measurements from it to be incorrect.  
Calculated latent and sensible heat fluxes were therefore incorrect also.

• 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)

• Radiation, net(net_radiation)

• net_radiation_mv

SGP EBBR E26 - Data Suspect, Low Battery Voltage

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.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

• Raw data stream - documentation not supported

SGP EBBR E26 - All Data Incorrect

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.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

• Raw data stream - documentation not supported

SGP EBBR E26 - Soil Heat Flow #3 Incorrect

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_flow_3
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_heat_flow_3_mv

SGP EBBR E26 - Soil Moisture #1 Incorrect

Soil Moisture #1 was a constant 33.7 and was incorrect.

Latent and Sensible Heat fluxes were normally minimally affected.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_heat_capacity_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• soil_moisture_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_moisture_1_r
• soil_moisture_1_rr

SGP EBBR E26 - AEM Inbetween, Data Incorrect

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.

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

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

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

SGP EBBR E26 - Soil Heat Flow #5 Incorrect

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_5
• soil_heat_flow_5
• corr_soil_heat_flow_5
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_heat_flow_5_mv

SGP EBBR E26 - Some Data Incorrect

The reference temperature sensor malfunctioned, causing all associated measurements to be 
incorrect.

• temp_air_bottom
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• temp_air_top
• energy_storage_change_5
• temp_trh_bottom
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• temp_trh_top
• bowen_ratio
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• soil_temp_5
• soil_temp_4
• soil_temp_3
• soil_temp_2
• soil_temp_1
• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• vapor_pressure_bottom
• temp_reference

• soil_temp_4_rr
• soil_temp_5_rr
• temp_air_left
• temp_reference_rr
• soil_temp_3_rr
• soil_temp_2_rr
• temp_air_right
• soil_temp_1_rr

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

SGP EBBR E26 - Some Data Incorrect

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• energy_storage_change_1
• energy_storage_change_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP EBBR E22 - E22 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_reference
• Wind speed arithmetic mean(wspd_arith_mean)
• temp_air_bottom
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• temp_trh_top
• Wind speed vector mean(wspd_vec_mean)
• energy_storage_change_1
• vapor_pressure_bottom
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• Radiation, net(net_radiation)
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• Wind direction vector mean(wdir_vec_mean)
• temp_air_top
• Atmospheric pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• vapor_pressure_bottom
• temp_trh_top
• Radiation, net(net_radiation)
• rh_bottom_fraction
• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• temp_reference
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_top
• Wind direction vector mean(wdir_vec_mean)
• temp_air_top
• rh_top_fraction
• Atmospheric pressure(atmos_pressure)
• temp_air_bottom

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

SGP EBBR E26 - Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_heat_flow_2
• soil_temp_3
• soil_heat_flow_1
• soil_temp_2
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP EBBR E26 - Low Battery Voltage

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.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP EBBR E26 - Battery Voltage Low

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.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP EBBR E22 - E22 EBBR 30 Minute Data Incorrect After Missing Data

Complete soil temperature information is not available
when the data is missing for the previous half hour.
Since soil temperature difference with time cannot be 
computed properly, the selected calculated quantities are incorrect.

• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_1
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

SGP/EBBR/E22 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E26 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E22 - All Measurements Zero

The measurements are often all zero the first period after a CR10 restart, as occurred 
here.

• Raw data stream - documentation not supported

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_reference
• Wind speed arithmetic mean(wspd_arith_mean)
• temp_air_bottom
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• temp_trh_top
• Wind speed vector mean(wspd_vec_mean)
• energy_storage_change_1
• vapor_pressure_bottom
• home_signal_30
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• Radiation, net(net_radiation)
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• home_signal_15
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• Wind direction vector mean(wdir_vec_mean)
• temp_air_top
• Atmospheric pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• vapor_pressure_bottom
• temp_trh_top
• Radiation, net(net_radiation)
• rh_bottom_fraction
• temp_trh_bottom
• home_signal
• Wind speed arithmetic mean(wspd_arith_mean)
• temp_reference
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_top
• Wind direction vector mean(wdir_vec_mean)
• temp_air_top
• rh_top_fraction
• Atmospheric pressure(atmos_pressure)
• temp_air_bottom

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

SGP/EBBR/E22 - AEM Hung or High Home Signals

The automatic exchange mechanism hung some times and continued to switch at other times, 
although with high home signal values.  If home signal values are not in the proper 
ranges, the gradient calculation is not performed properly by the CR10 program.  Affected flux 
measurements cannot be recalculated.

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E26 - Measurements Zero

The measurements are often zero after a CR10 datalogger restart, as occurred here.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

• Raw data stream - documentation not supported

SGP/EBBR/E26 - Measurements Incorrect

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• energy_storage_change_1
• energy_storage_change_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP/EBBR/E26 - Multiplexer 2 Failure From High Temperature

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.

• temp_air_bottom
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• bowen_ratio
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• temp_air_top
• soil_heat_flow_3
• soil_heat_flow_5
• vapor_pressure_top
• soil_heat_flow_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• vapor_pressure_bottom
• surface_soil_heat_flux_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• corr_soil_heat_flow_5

• temp_air_right
• temp_air_left

• temp_air_top
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom

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/E22 - Data Incorrect during 6 month checks

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

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E26 - Data Incorrect during 6 month checks

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

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E22 - AEM Hung between home positions

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

There is no work-around to this problem.

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - Water inside Broken Net Rad Dome

The net radiation measurement is incorrect. Measurements 
calculated using net radiation are also incorrect.  

No work-around is possible for this situation.

• 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)

• Radiation, net(net_radiation)

SGP/EBBR/E26 - Measurements zero following logger restart

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

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP/EBBR/E26 - Multiplexer Problem

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.

• temp_air_bottom
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• temp_air_top
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• surface_soil_heat_flux_3
• corr_soil_heat_flow_2
• surface_soil_heat_flux_4
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

• temp_air_right
• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E26 - Water in broken Net Radiometer Dome

The net radiation measurement is incorrect. Measurements 
calculated using net radiation are also incorrect.  

No work-around is possible for this situation.

• 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)

• Radiation, net(net_radiation)

SGP/EBBR/E26 - Battery Voltage Low

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.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• soil_moisture_5
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP/EBBR/E26 - AEM Hung

The AEM hung inbetween home positions during the period.  The Bowen ratio, gradient 
measurements, sensible heat flux, and latent heat flux are incorrect.

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E26 - Data zeros following logger restart

Most measurements were zero after restart of the CR10 datalogger,
after a calibration changeout of the EBBR unit.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP/EBBR/E26 - Left Air Temperature Incorrect

The left air temperature was incorrect during the period.  Poor electronic
connections may have caused this.

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

• temp_air_left

• vapor_pressure_bottom
• temp_air_top
• temp_air_bottom
• vapor_pressure_top

SGP/EBBR/E26 - E26 EBBR Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect much of the time.

The sensor was replaced.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_1
• soil_heat_flow_1
• corr_soil_heat_flow_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_heat_flow_1_mv

SGP/EBBR/E26 -Right Air Temperature Incorrect

One of the Right Air Temperature connections was loose, producing incorrect data.

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

• temp_air_right
• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E22 - home30 too large

The home30 measurements sometimes exceeded 34.9999, resulting in the
qc flag being set.

However, this does not create any data quality issues.  The qc flag is
set just to provide an alert that the automatic exchange mechanism may have a problem; in 
this case data was not affected.

An electronics repair solved the problem.

• home_signal_30

• home_signal

• home_signal

SGP/EBBR/E22 -  6 Month Checks

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

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

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

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

SGP/EBBR/E26 -  6 Month Checks

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

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

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

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

SGP/EBBR/E26 - Soil Heat Flow #5 Large Positive

Soil Heat Flow #5 was large positive for these two periods, for
an unknown reason.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_5
• soil_heat_flow_5
• corr_soil_heat_flow_5
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_heat_flow_5_mv

SGP/EBBR/E22 - AEM Hung Inbetween Home Positions

The AEM was hung inbetween home positions.

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

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

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

SGP/EBBR/E22 - AEM Home Signals Too High

The AEM home signals were too large at times during the indicated period;
it has been determined by the vendor that this is usually caused by electrical noise in 
the vicinity. When the 30 minute data shows a home 30 signal of 35 or more, the bowen 
ratio, and sensible and latent heat flux 
measurements are incorrect 

Removing the jumper between 4L and AG on the CR10 and adding a jumper to Multiplexer 2, 
Set 6, between L1 and L2 fixed the problem.  The
vendor intends to make this modification to all EBBR systems as they return
for re-calibration.

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

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

SGP/EBBR/E26  - Soil Storage Incorrect; Surface Fluxes Incorrect

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• energy_storage_change_1
• energy_storage_change_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_2
• energy_storage_change_5
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4

SGP/EBBR/E22  - 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.

• 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)

• Radiation, net(net_radiation)

• net_radiation_mv

SGP/EBBR/E26 - AEM Home Signals Incorrect, Surface Fluxes Incorrect

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.

• temp_air_bottom
• temp_air_top
• temp_trh_bottom
• temp_trh_top
• bowen_ratio
• rh_top_fraction
• home_signal_30
• rh_bottom_fraction
• home_signal_15
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• vapor_pressure_bottom

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

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

SGP/EBBR/E22 - 6 Month Checks

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

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

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

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

SGP/EBBR/E26 - 6 Month Checks

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

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

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

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

SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect

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.

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

• atmos_pressure_mv

• Atmospheric pressure(atmos_pressure)

SGP/EBBR/E22  - 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.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E22 - Wind Direction Sensor Frozen 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.

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

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

• wdir_vec_mean_mv

SGP/EBBR/E26  - 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.

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

• Wind speed arithmetic mean(wspd_arith_mean)

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

SGP/EBBR/E26  - Wind Direction Sensor Frozen 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.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E22 - Wind Speed Sensor Bearings Worn

Wind speed was too low and/or often at or near zero due to
               worn bearings in the wind speed sensor.  Sensor was replaced
               3/17/04.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E22  - 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.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E22  - 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.

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

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

SGP/EBBR/E26  - 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.

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

• Wind speed arithmetic mean(wspd_arith_mean)

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

SGP/EBBR/E26  - 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.

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

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

SGP/EBBR/E22 - Net Radiation Incorrect

Rain filled the bottom of the net radiometer with water, resulting
in very high net radiations.  Net radiation is incorrect during this period,
also causing sensible and latent heat fluxes to be incorrect.

• 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)

• Radiation, net(net_radiation)

SGP/EBBR/E22 - Water In Net Radiometer

Water entered the Net Radiometer through a cracked upper dome, causing the
net radiation values to be too large.  As a result, latent and sensible heat flux values 
are also incorrect.

• 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)

• Radiation, net(net_radiation)

SGP/EBBR/E26 - Soil Temperature #4 and Soil Heat Flow #4 Incorrect

The soil temperature and soil heat flow probes for set #4 was pulled 
partially out of the ground.  This caused soil temperature #4 to be too high and soil heat 
flow #4 to be too low.  The error is not so great as to cause a large error in the 
sensible and latent heat fluxes.

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_4
• corr_soil_heat_flow_4
• soil_temp_4
• surface_soil_heat_flux_4
• soil_heat_capacity_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_heat_flow_4

SGP/EBBR/E26 - Spark Gap Bad, Pressure Incorrect

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.

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

• atmos_pressure_mv

• Atmospheric pressure(atmos_pressure)

SGP/EBBR/E22 - 6 Month Checks

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

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

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

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

SGP/EBBR/E26 - 6 Month Checks

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

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

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

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

SGP/EBBR/E26 - Low Battery Voltage - Many Measurements Incorrect

During low battery voltage conditions (< 10.5 V especially) many measurements are 
incorrect.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP/EBBR/E26 - Most Measurements Incorrect

Most of the measurements became either too large or too small.
The cause is not known.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• Atmospheric pressure(atmos_pressure)

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

• temp_trh_bottom
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• Radiation, net(net_radiation)

SGP/EBBR/E22  - 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.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E26  - 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.

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

• Wind speed arithmetic mean(wspd_arith_mean)

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

SGP/EBBR/E22  - 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.

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

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

• wdir_vec_mean_mv

SGP/EBBR/E26  - 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.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E26 - Aging Pressure Sensor Output Changes
With Supply Voltage

The E26 EBBR pressure sensor experienced the poor internal voltage regulation problem 
experienced at other sites last year.  Aging of the internal voltage regulator caused the 
pressure output to drop by 1-2 kPa (0.1-0.5 kPa is normal) when the Sun rose and the solar 
panel goosed the battery voltage up.  

The sensible and latent heat fluxes were not significantly affected.

• Atmospheric pressure(atmos_pressure)

• atmos_pressure_mv

• Atmospheric pressure(atmos_pressure)

SGP/EBBR/E22  - 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.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E22  - 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.

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

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

• wdir_vec_mean_mv

SGP/EBBR/E22 - Net Radiation Too Low - Top Dome Broken

Net radiation values were too low because of a broken top dome.

• 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)

• Radiation, net(net_radiation)

• net_radiation_mv

SGP/EBBR/E26 - Incorrect soil type coefficients used

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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_5
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_heat_capacity_5
• soil_moisture_1
• soil_heat_capacity_4
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_5

SGP/EBBR/E22 - Improved EBBR CR10 Program

Effective 20050330.1930, the EBBR.E20 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 20050330, 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 sgp30ebbrE20.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE20.a1).

• 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)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E26 - Improved EBBR CR10 Program

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).
~

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• 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/E22 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect

The net radiometer top dome was broken and water got inside, making the net radiation, and 
sensible and latent heat flux measurements incorrect.

• 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)

• Radiation, net(net_radiation)

• net_radiation_mv

SGP/EBBR/E22 - 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.

• 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)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E26 - 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.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• 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/E22 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E22 data collected by ARM back to the installation of the 
instrument in April 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

SGP/EBBR/E26 - metadata corrections

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")

• base_time

• base_time

• base_time

SGP/EBBR/E26 - Data Suspect During Low Supply Voltage

Low battery supply voltage resulted in high home signals and questionable data at times.
Data for battery voltage <10.5 volts should be considered to be incorrect.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• time_offset
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• alt
• Atmospheric pressure(atmos_pressure)
• base_time

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• lat
• temp_air_left
• alt
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• time_offset
• base_time
• soil_temp_2_rr
• Wind speed arithmetic mean(wspd_arith_mean)
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• time
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• time_offset
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• alt
• vapor_pressure_top
• Radiation, net(net_radiation)
• lat
• base_time

SGP/EBBR/E22 - Sensible and Latent Heat Fluxes Incorrect

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - Fluxes Incorrect When Soil Heat Flow #3 Out of Range

When soil heat flow #3 exceeded the range limit in the EBBR program, it was replaced with 
9999es.  This caused the ave_shf and the sensible and latent heat fluxes to be incorrect.

• 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)
• corr_soil_heat_flow_1
• soil_heat_flow_1
• surface_soil_heat_flux_1
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E22 - Wind Speed Sensor Frozen Stopped

The wind speed sensor was frozen to a stopped condition.

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

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

• Wind speed arithmetic mean(wspd_arith_mean)

SGP/EBBR/E26 - Measurements Incorrect

Most measurements were incorrect during low battery voltage conditions.

• Wind speed vector mean(wspd_vec_mean)
• rh_top_fraction
• Wind speed arithmetic mean(wspd_arith_mean)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• temp_reference
• corr_soil_heat_flow_5
• wdir_vec_std
• temp_air_top
• surface_soil_heat_flux_5
• soil_moisture_5
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• temp_trh_top
• rh_bottom_fraction
• home_signal_15
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• lon
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Radiation, net(net_radiation)
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_2
• soil_heat_capacity_3
• bowen_ratio
• home_signal_30
• soil_heat_capacity_1
• lat
• soil_temp_5
• soil_temp_4
• soil_heat_flow_3
• soil_temp_3
• soil_heat_flow_2
• soil_temp_2
• soil_heat_flow_1
• soil_temp_1
• soil_heat_flow_5
• soil_heat_flow_4
• temp_air_bottom
• Wind direction vector mean(wdir_vec_mean)
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• time_offset
• energy_storage_change_4
• energy_storage_change_5
• temp_trh_bottom
• alt
• Atmospheric pressure(atmos_pressure)
• base_time

• wdir_vec_mean_mv
• soil_heat_flow_4_mv
• soil_moisture_4_rr
• soil_heat_flow_3_mv
• soil_temp_1_rr
• soil_moisture_5_rr
• temp_trh_right_rr
• soil_heat_flow_2_mv
• battery_voltage
• lon
• soil_temp_3_rr
• soil_moisture_2_rr
• soil_heat_flow_1_mv
• soil_temp_4_rr
• temp_trh_left_rr
• lat
• temp_air_left
• alt
• rh_right_mv
• soil_moisture_3_rr
• home_signal
• soil_moisture_1_rr
• temp_air_right
• rh_left_mv
• soil_temp_5_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• time_offset
• base_time
• soil_temp_2_rr
• Wind speed arithmetic mean(wspd_arith_mean)
• atmos_pressure_mv
• net_radiation_mv

• temp_trh_bottom
• lon
• Wind speed arithmetic mean(wspd_arith_mean)
• wdir_vec_std
• time
• rh_top_fraction
• home_signal
• Atmospheric pressure(atmos_pressure)
• time_offset
• rh_bottom_fraction
• temp_reference
• Wind direction vector mean(wdir_vec_mean)
• temp_trh_top
• temp_air_top
• Wind speed vector mean(wspd_vec_mean)
• temp_air_bottom
• vapor_pressure_bottom
• alt
• vapor_pressure_top
• Radiation, net(net_radiation)
• lat
• base_time

SGP/EBBR/E22 - Net Radiation and Sensible and Latent Heat Fluxes Incorrect

Rain entered the net radiometer, causing net radiation, and thus sensible and latent heat 
fluxes, to be too large.

• 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)

• Radiation, net(net_radiation)

• net_radiation_mv

SGP/EBBR/E22 - Soil Heat Flow #4 Incorrect - Sensible and Latent Heat Fluxes Sometimes 
Affected

Soil heat flow sensor #4 dropped to low values or offscale.

Sensible and latent heat fluxes were sometimes affected.

• 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)
• corr_soil_heat_flow_4
• soil_heat_flow_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_4

• soil_heat_flow_4_mv