SGP/EBBR - EBBR E15 Anemometer Cup Off, Wind Speed Incorrect

An anemometer cup fell off.

The following values were therefore incorrect:

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR- EBBR E15 Air Temperatures Incorrect

When the reference temperature sensor was being replaced, the left and
right thermocouple air temperatures and humidity probe temperatures 
were incorrect.

Affected data values were:

5 Minute:  tref, tair_top, tair_bot, thum_top, thum_bot, vp_top, vp_bot
15 minute: rr_tref, rr_thum_l, rr_thum_r, tair_r, tair_l
30 minute: tref, tair_top, tair_bot, thum_top, thum_bot, vp_top, vp_bot,
           bowen, e, h

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

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

• temp_air_left
• temp_reference_rr
• temp_trh_right_rr
• temp_air_right
• temp_trh_left_rr

SGP/EBBR/E15 - EBBR E15 Wind Speed Iced

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

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - E15 EBBR Reference Temperature Incorrect

The reference temperature was incorrect during the indicated periods.  This
temperature is used to adjust air temperature measurements; therefore air
temperature and resulting sensible and latent heat fluxes and Bowen ratio 
are incorrect.

• temp_air_top
• temp_reference
• temp_air_bottom

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

• temp_air_left
• temp_air_right
• temp_reference_rr

SGP/EBBR/E15 - E15 EBBR Data Incorrect

All of the measurements (except, battery voltage, time_offset, lat, lon, etc.) were 
incorrect during the installation of a new reference temperature sensor.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• soil_heat_capacity_5
• temp_trh_bottom
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• Radiation, net(net_radiation)
• soil_heat_flow_1
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• Raw data stream - documentation not supported

• soil_heat_flow_1_mv
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP/EBBR/E15 - E15 EBBR Data Missing

The data for this period was missing, during replacement of the reference temperature 
sensor.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• Raw data stream - documentation not supported

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset
• soil_moisture_5_rr

SGP/EBBR/E15 - E15 EBBR Data Incorrect

All of the measurements (except, battery voltage, time_offset, lat, lon, etc.) were 
incorrect during a logger upgrade.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• soil_heat_capacity_5
• temp_trh_bottom
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• Radiation, net(net_radiation)
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• Raw data stream - documentation not supported

• soil_heat_flow_1_mv
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP/EBBR/E15 - E15 EBBR Data Missing

The data for this period was missing, during an upgrade of the data logger.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• Raw data stream - documentation not supported

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset
• soil_moisture_5_rr

SGP/EBBR/E15 - E15 EBBR Some Soil Temperatures and Heat Flows Incorrect

For an unknown reason, some of the soil temperatures and soil heat flows
were incorrect, leading to many of the calculated quantities being incorrect.

• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_5
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5

• soil_heat_flow_1_mv
• soil_temp_5_rr
• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_heat_flow_2_mv
• soil_heat_flow_5_mv

SGP/EBBR/E15 - E15 EBBR Some Soils and Flux Data Incorrect

The soil heat capacity measurements were incorrect for an unknown reason, resulting in 
incorrect average soil heat flow and latent and sensible heat fluxes.

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

SGP/EBBR/E15 - E15 EBBR AEM Stuck in Middle

When the AEM does not complete switching and becomes hung at a mid
position, the indicated data measurements are incorrect.

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

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

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

SGP/EBBR/E15 - E15 EBBR AEM Replacement

Large home signals occured while the AEM was being replaced; 
the indicated data measurements are incorrect.

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

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

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

SGP/EBBR/E15 - E15 EBBR Battery Voltage Low

When EBBR battery voltage is 10.4 volts or less, the measurements
are considered to be incorrect.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• temp_trh_bottom
• soil_heat_capacity_5
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• Radiation, net(net_radiation)
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• temp_trh_right_rr
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP/EBBR/E15 - E15 EBBR Incorrect Net Radiation

Incorrect net radiation resulted in incorrect sensible and latent heat fluxes.

• 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 - E15 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• temp_trh_bottom
• soil_heat_capacity_5
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• Radiation, net(net_radiation)
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP EBBR E15 - E15 EBBR Battery Voltage Low, Data Incorrect

When the battery voltage is 10.4 volts or below, all selected data should be considered to 
be incorrect.  See the battery voltage in the 15 minute data to determine times of 
incorrect data.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• Radiation, net(net_radiation)
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP EBBR E15 - E15 EBBR Data Zeros Incorrect

The data was all zeros after a logger restart for 5 , 15, and 30 minute periods.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• soil_heat_capacity_5
• temp_trh_bottom
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• Radiation, net(net_radiation)
• bowen_ratio
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP EBBR E15 - E15 EBBR Recalibration Changeout

During the indicated period the EBBR unit was being changed out with a
recalibrated unit.  All data is incorrect or missing.

Unit #14 was removed; #6 was installed.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• soil_heat_flow_1
• Radiation, net(net_radiation)
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• Raw data stream - documentation not supported

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• lon
• soil_moisture_3_rr
• soil_moisture_2_rr
• temp_reference_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_rr
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset
• soil_moisture_5_rr

SGP/EBBR/E15 - Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• temp_trh_bottom
• soil_heat_capacity_5
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP/EBBR/E15 - T/RH Check

During the month of November 1994, site operations personnel conducted
field comparisons of the temperature and relative humidity sensors in the
EBBRs and the HMI31 portable T/RH meter (with the removable probe).  As is
reflected in the home signal output, the automatic exchange mechanism was
disabled in order to conduct the checks.

Measurements were taken every 5 minutes, for a half hour each in the
aspirated radiation shields (the HMI31 was inserted into the EBBR aspirated
radiation shield to provide the same aspiration as the EBBR sensors
received).  Measurements of aspirator flow were also recorded.  This
information was provided to the mentor.  The mentor then compared the field
checks with the data recorded by the EBBRs.

The periods of data and data fields that are incorrect because of the checks
are listed below.  Times are those at which the data are reported.


Data Fields

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot
15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, tair_r, tair_l
30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot, bowen, e, h

5 minute:  1650, 1655, 1700, 1705, 1710, 1715, 1720, 1725, 1730,
           1735, 1740, 1745, 1750, 1755, 1800, 1805
15 minute: 1700, 1715, 1730, 1745, 1800, 1815
30 minute: 1700, 1730, 1800, 1830

(EDITOR'S NOTE:  The following analysis refers to all EBBRs installed in Nov 1994)

Results of the T/RH comparisons:
The combined accuracy of the HMI31 and EBBR temperature sensors
(thermocouples or PRTDs) is +/- 0.4 degrees C.  The combined accuracy of the
HMI31 and EBBR RH sensors is +/- 4% for RH less than 80%, and +/- 6% for RH
greater than 80%.  The combined accuracy for each pair of EBBR sensors of
the same type is essentially the same as the quantities stated above.

All of the pairs of EBBR sensors show differences that fall within the
stated combined accuracies.  Although this sounds wonderful, a few of the
differences are close to the combined accuracy, which, because of the small
differences in temperature being measured (normally smaller than the
magnitude of the combined accuracy) could lead to some incorrect estimation
of sensible and latent heat flux.  However, unless there would be substantial
differences of calibration slope of two sensors in a pair, the switching of
height of the sensors every 15 minutes by the automatic exchange mechanism
will remove the offset between the sensors.

The comparisons between the EBBR sensors and the HMI31 T/RH meter showed
much larger differences.  The range of differences were: -2.4 to 0.0 degrees
for the thermocouples, -2.1 to 0.1 degrees for the RH probe PRTDs, and -6.6 to
6.7 percent for the RH sensors.  Six Thermocouples indicated differences from
the HMI31 greater than the combined accuracy.  Seven PRTDs indicated
differences from the HMI31 greater than the combined accuracy.  Four RH
sensors indicated differences from the HMI31 greater than the combined
accuracy.  The temperature differences (for both thermocouples and PRTDs)
were nearly all of one sign; the HMI31 indicated the greater temperature,
which may suggest a bias in the HMI31 temperature measurement, even though
a dozen differences of +/- 0.2 degrees were measured.  Four differences of
zero and only one positive difference (out of 40) were measured.  Thirteen of
the 20 RH differences were positive (HMI31 indicating the lower
RH), with the differences near the level of the combined accuracies being
approximately 50% positive and 50% negative.  It does not appear that the
HMI31 has a RH bias.

Plots of EBBR sensor/HMI31 differences as a function of time from the
installation of the individual sensors (a range of 10 to 30 months in the
field) shows no obvious pattern of sensor drift with time.  This is encouraging.

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

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

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

SGP/EBBR/E15 - 3-month Check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.

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

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

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

SGP/EBBR/E15 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

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

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

• temp_air_left
• temp_air_right

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/E15 - Data Incorrect during 6 month checks

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

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E15 - REPROCESS: Soil Moisture #1 Offset

The wrong offset (9.5264) was used in the calibration coefficients for
Soil Moisture Probe #1. The correct offset is 0.95264.

Sensible and Latent Heat Flux measurements are not significantly affected.

• soil_moisture_1

SGP/EBBR/E15 - Data Mostly Zero Following Logger Restart

Most of the measurements were zero, which normally happens after a 
datalogger restart.  The restart on 07/22/02 occurred after a pressure
sensor replacement.

• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• soil_heat_capacity_5
• temp_trh_bottom
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_5_mv
• soil_moisture_5_rr

SGP/EBBR/E15 - Pressure Low

The pressure measurements were too low during this period, as much as 40
mb too low.  This occurred after a restart of the
EBBR CR10 datalogger, for unknown reasons.

• Barometric Pressure(atmos_pressure)

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E15 -  6 Month Checks

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

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

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

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

SGP/EBBR/E15 - Wind Direction 10 Degrees Low

The wind direction at E15 EBBR was 10 degrees low for the period (since
installation of the EBBR unit on 10/11/01). The wind direction sensor was apparently 
aligned to magnetic north instead of true north at installation.

• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)

• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)

• wdir_vec_mean_mv

SGP/EBBR/E15 - Top Humidity reported as zero in 30 minute data.

The top relative humidity was reported as zero in the 30 minute data.
This is an apparent misreporting by the CR10 datalogger or is caused by
a communications problem in accessing the data from the datalogger.  It is very 
infrequently seen; it's actual cause is unknown. No other data was
affected.

• rh_top_fraction

SGP/EBBR/E15 - Reference Temperature Failed

The reference temperature failed, making air temperatures,
e, h, and Bowen ratio incorrect.

• temp_air_top
• temp_air_bottom

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

• temp_air_left
• temp_air_right

SGP/EBBR/E15  - 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.

• 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 Temperature #5 Incorrect, Surface Fluxes Incorrect

Soil Temperature #5 was incorrect.

This affected many measurements, including sensible and latent heat fluxes.

• surface_soil_heat_flux_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Soil temperature mean 5(soil_temp_5)
• 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)
• energy_storage_change_5

• soil_temp_5_rr

SGP/EBBR/E15 - Soil Temperature #5 Incorrect, Surface Fluxes Incorrect

Soil Temperature #5 was incorrect.

This affected many measurements, including sensible and latent heat fluxes.

• surface_soil_heat_flux_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Soil temperature mean 5(soil_temp_5)
• 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)
• energy_storage_change_5

• soil_temp_5_rr

SGP/EBBR/E15 - AEM Hung Between Home Positions, Surface Fluxes Incorrect

The AEM was hung inbetween home positions.

Therefore the sensible and latent heat fluxes are also incorrect.

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

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

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

SGP/EBBR/E15 - 6 Month Checks

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

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

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

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

SGP/EBBR/E15  - Net Radiometer Iced Over During Storm

The net radiometer was covered with ice from a storm.  Net radiation values are incorrect, 
and are sometimes even negative during the daytime.  Sensible and latent heat fluxes are 
therefore incorrect.

• 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  - 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, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Wind Direction About 130 Degrees Low

The EBBR wind direction sensor developed an approximately -130 degree offset. The pin 
holding the vane to the shaft had fallen out.

• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

• wdir_vec_std
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

• wdir_vec_mean_mv

SGP/EBBR/E15 - Net Radiometer not level

The EBBR net radiometer at E15 was suspected to be off of level
               because the daily peak net radiation was recorded later than it 
               was recorded by the SIRS.

               Site Ops found the EBBR net radiometer at E15 was significantly 
               off of level (1/2 bubble tipped to the north).  Adjustment of 
               the level improved the comparison of peak time with the 
               co-located SIRS.

               There was no significant effect on the sensible and latent heat 
               fluxes.

• Radiation, net(net_radiation)

• Radiation, net(net_radiation)

SGP/EBBR/E15  - 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, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Wind Speed Incorrect

The cups were broken off of the wind speed sensor by hail on 4/23/04. The cups were 
replaced on 4/27/04.  Wind speed measurements were near zero and incorrect during the indicated 
period.

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• res_ws
• wind_s

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Soil Moisture Coefficients Incorrect

The soil Moisture coefficients used for E15 were incorrect from the time of
installation of the system in program version 8.  On 9 July 02 parameter 4  (an offset 
value) of program step 136 was changed from 9.5264 to the correct value 0.95264 (this error 
had been made by the vendor). The error masked the real problem (wrong soil type) and 
after 9 July 02 resulted in very low soil moisture measurements.  The coefficients used were 
for coarse sand.  On 28 Sep 04 I visited the E15 site and found the soil type a fine 
sandy clay or fine sandy loam.  I changed the coefficients  at 1509 GMT to those for a very 
fine sandy loam; this produced reasonable soil moistures for the soil type.

The old coefficients in parameters 4 through 9 for step 136 of the program were: 0.95264, 
-6.7859, 36.224, -58.619, 25.073, 4.2278

The new coefficients are: 10.241, -27.943, 49.523, -12.648, -52.643, 38.054

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

SGP/EBBR/E15 - 6 Month Checks

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

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

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

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

SGP/EBBR/E15  - 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, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15  - 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, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

• wdir_vec_std
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

• wdir_vec_mean_mv

SGP/EBBR/E15  - 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, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15  - 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, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

• wdir_vec_std
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)

• wdir_vec_mean_mv

SGP/EBBR/E15 - Soil Heat Flows Undermeasured, and Latent and Sensible Heat Fluxes 
Overstimated

Use of the wrong soil type soil moisture coefficients caused soil moisture to be greatly 
undermeasured (a typical wrong value was 4% instead of the correct 17%), soil heat flows 
to be undermeasured, and sensible and latent heat fluxes to be overestimated.

Soil heat flow plate outputs were undermeasured by up to 10%, change of energy storage was 
undermeasured by up to 80% and total soil heat flow was undermeasured by up to 50% as a 
result. This would result in approximately a 5% overestimation of both sensible and 
latent heat fluxes.

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

SGP/EBBR/E15 - Net Radiation Too Large - Water in Bottom

Water in the bottom dome of the net radiometer made the measurements incorrectly large.  
Sensible and latent heat fluxes were therefore 
incorrect.

• 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 - Improved EBBR CR10 Program

Effective 20050329.1900, the EBBR.E15 CR10 program was revised to improve 
the quality of the primary measurements as follows:
   
1) An RMS procedure is used to determine max and min limits of acceptable
soil heat flow.  This is applied to the individual soil sets.  Measurements
outside the limits are rejected and the measurements within the limits are
used to calculate the average soil heat flow.
   
2) Max and min limits are used to determine incorrect values of net
radiation, sensible heat flux (h), latent heat flux (e), and automatic
exchange mechanism (AEM) signal.  If AEM signal is outside the limits, h 
and e are set to 999s.  If net radiation is outside the limits, h and e are 
set to 999s. If h or e are outside the limits, h and e are set to 999s.
   
Virtually no incorrect soil measurement will affect the primary 
measurements of h and e.
   
By setting h and e to 999s, it can be easily seen that the primary 
variables are incorrect; no other interpretation is possible.
   
Prior to 20050329, the improved CR10 program was NOT in effect.  DQRs have
been submitted for known instances of incorrect soil measurements which
affected the quality of the primary measurements of h and e.
   
Note: the DQR begin date is the begin date of the sgp30ebbrE15.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE15.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/E15 - 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/E15 - Soil Set #5 Temperature, Moisture, and Heat Flow Incorrect

Rodents chewed the cables on all three soil set #5 sensors, making the measurements 
incorrect.

• surface_soil_heat_flux_5
• corr_soil_heat_flow_5
• Soil temperature mean 5(soil_temp_5)
• soil_moisture_5
• soil_heat_capacity_5
• soil_heat_flow_5
• energy_storage_change_5

• soil_moisture_5_rr
• soil_temp_5_rr
• soil_heat_flow_5_mv

SGP/EBBR/E15 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E15 data collected by ARM back to the installation of the 
instrument in September 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 type
4) Correction of soil moisture units (from "by volume" to "gravimetric")

• base_time

• base_time

• base_time

SGP/EBBR/E15 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect.

The top dome of the net radiometer was broken, resulting in net radiations that were too 
small, and thus sensible and latent heat fluxes that were too small.

• 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 - Incorrect Sensible and Latent Heat Fluxes

Incorrect gradient measurements and sensible and latent heat fluxes resulted from the AEM 
not exchanging.

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

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

• temp_air_left
• temp_air_right

SGP/EBBR/E15 - Reprocess: Sensible and Latent Heat Fluxes, Soil Set #2 Sometimes Incorrect

Spikes in soil set #2 sometimes caused sensible and latent heat fluxes to be incorrect.  

There is no electronic connection between the soil set #2 sensors, so it is suspected that 
there was a problem in the soil set #2 cable bundle. A power outage ensued, after which 
the soil set #2 problem did not re-occur.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Soil temperature mean 2(soil_temp_2)
• surface_soil_heat_flux_2
• soil_heat_capacity_2
• soil_heat_flow_2
• soil_moisture_2
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• energy_storage_change_2

SGP/EBBR/E15 - Wind Speed Sensor Frozen Stopped

Freezing rain froze the wind speed sensor to a stopped condition during the period.

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Wind Direction Dependency of Surface Fluxes and General Data Quality 
Information

Beginning in FY2006, Data Quality Reports are not written for missing 
data or for situations when qc flags clearly show that the data is 
incorrect (this is true for most of the conditions listed below).  
DQRs are written for periods when data is incorrect, when the situation 
is not represented by qc flags in the data, and it's not obvious that 
the data should have been flagged as incorrect.

The EBBR data is only useful for particular wind directions at each 
Extended Facility.  Please use the following resources to help in 
interpreting the EBBR data.

1) qc flags in the EBBR data.

2) Instrument Mentor Monthly Summaries (IMMS) at http://www.db.arm.gov/IMMS/

3) SGP EF Surface Conditions Observations (EFSCO) at 
http://198.124.96.210:591/sfc_cond1/default.htm

4) Surface fluxes are valid only for the following wind directions
(in degrees):

133-360

Note that there are wind directions at most sites for which the fetch
is insufficient and therefore EBBR data is invalid.  Appropriate 
fetch was determined from a 1/40 measurement height to fetch ratio, 
resulting in a required minimum fetch of 120 m.  Particular attention 
should be paid to the limited valid wind directions for the Central 
Facility EBBR.  The surface vegetation type for the EBBRs is grazed 
or ungrazed grassland (refer to the EFSCO for state).

5) Some conditions that commonly cause the EBBR primary measurements to 
be incorrect or missing follow:

a) Sensible and latent heat fluxes are not accurate during times when 
the Automatic Exchange Mechanism (AEM) is not functioning properly.  
The AEM switches the gradient measuring instrumentation between the 
top and bottom positions every 15 minutes; this reduces the effects of 
instrument offsets.  Sometimes the AEM does not reach it's full extent 
of travel, resulting in the home signal being zero.  

b) Sensible and latent heat fluxes are sometimes incorrect when surface 
soil heat flow is out of range, as seen in the average soil heat flux 
(ave_shf).

c) Very light winds may be seen at nights for brief periods. Wind 
direction flops around a lot during low wind conditions (< 1.5 m/s) 
and is often unreliable during those periods.

d) Missing data periods occur at times; this is usually a site data 
system collection/communication problem; it can also occur during 
replacement of the system with a newly calibrated unit.  Missing data 
is sometimes filled in later from manual or automatic re-collection of 
the data.

• lon
• vapor_pressure_top
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• temp_air_bottom
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_moisture_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_5
• soil_moisture_2
• soil_heat_flow_4
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• temp_reference
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

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/E15 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Soil Moisture and Soil Temp #1 Incorrect

Soil Moisture #1 and Soil Temperature #1 were incorrect during this period.

This situation did not affect the sensible and latent heat fluxes (EBBR programming used 
only the 4 good soil measurements to determine soil surface heat flux).

• corr_soil_heat_flow_1
• Soil temperature mean 1(soil_temp_1)
• soil_heat_capacity_1
• energy_storage_change_1
• surface_soil_heat_flux_1
• soil_moisture_1

• soil_temp_1_rr
• soil_moisture_1_rr

SGP/EBBR/E15 - Sensible and Latent Heat Fluxes Low
(Net Radiation too low)

Sensible and Latent Heat Fluxes were measured as being low because of damage to the net 
radiometer.

The Sensible and Latent Heat fluxes can be approximated by taking the ratio of the daytime 
SIRS net radiation to EBBR net radiation, and then multiplying the Sensible and Latent 
Heat Fluxes by that ratio.

• 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 - Sensible and Latent Heat Flux Suspect - Soil Heat Flow 5 Problem

Soil Heat Flow sensor 5 was offscale at times, causing sensible and latent heat fluxes to 
be incorrect during those times.

• surface_soil_heat_flux_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• 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/E15 - Soil heat flow #1 failure

Soil heat flow 1 sensor wires chewed by rodents. Values less than the accepted minimum.

• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• corr_soil_heat_flow_1
• soil_heat_flow_1
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

• soil_heat_flow_1_mv

SGP/EBBR/E15 - Soil heat flow #5 failure

Soil_heat_flow_5 sensor failed at times, resulting in sensible and latent heat fluxes 
being incorrect at times. Sensor was replaced 2/6/2012.

• surface_soil_heat_flux_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• 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/E15 - Sensible and Latent heat fluxes incorrect

Soil Heat Flow sensor 5 was incorrect at times and just "noisy" at other times. Therefore 
Sensible and Latent heat fluxes were often incorrect.

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

SGP/EBBR/E15 - Sensible and Latent Heat Fluxes Incorrect

Soil heat flow 1 did not report correctly at times, resulting in incorrect sensible and 
latent heat fluxes at times.

• 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)
• corr_soil_heat_flow_1
• soil_heat_flow_1
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)

SGP/EBBR/E15 - Sensible and latent heat fluxes incorrect

The AEM stuck in between levels during these two periods.

Therefore, sensible and latent heat fluxes were incorrect during these times.

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

SGP/EBBR/E15 - AEM failure

AEM failure; sensible and latent heat fluxes are incorrect.

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

SGP/EBBR/E15 - Missing data

Data are missing and unrecoverable.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• time
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• time
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• home_signal_30
• soil_heat_capacity_4
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_3
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• soil_moisture_3_rr
• temp_reference_rr
• soil_moisture_2_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• time
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_moisture_1_rr
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_rr
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset
• soil_moisture_5_rr

SGP/EBBR/E15 - Sensible and Latent Heat Fluxes Incorrect

The AEM did not work. Sensible and latent heat fluxes are incorrect for this period.

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

Incorrect readings for pressure sensor

ARM PROBLEM IDENTIFICATION FORM (PIF)

                            PIF No. P940105.1

Subject:  SGP/Ebbr - Incorrect readings for pressure sensor at E15

Submitted By:        David R. Cook
    Organization:    Argonne National Laboratory
    Date Submitted:  December 13, 1993

How may we contact you?
    e-mail:  cook@anler.er.anl.gov
    phone:   (708) 252-5840
    FAX:     (708) 252-9792

Submitter's Priority: 3
    [Critical-1   Very Important-2 Important-3 Inconvenient-4 Interesting-5]

Where was this Problem Identified:  DA
    [Site Data System-SDS      Experiment Center-EC]
    [Archive-A At              Field Instrument-FI ]
    [During Data Analyis-DA    Other- List Location]

Does this PIF result in a Software Change Request?  No
    Where:                     [ SDS,  EC, or  A ]

    Type:                      [Development-1 Problem-2  Enhancement-3]

    List Programs/Documents Affected:

    Configuration Identification:

Does problem impact data values or cause data loss?  Data values.
    which platform(s): EBBR, E15, Ringwood, OK

    Specify (or estimate) begin and end dates
          Begin Date   7/11/93
          End   Date  12/01/93   Time  1830 GMT

    Apparent cause of data loss, if known:

    SUGGESTED CAUSES:   Calibration Drift.
    [human error, component failure, temperature, lightning          ]
    [foreign matter, power loss, software failure,                   ]
    [communications failure, modification difficulites, specify other]


Problem Description/Change Description.

o For Instrument Problems ONLY,
        Identify MODE of Operation: Normal

o Give a brief explanation with details, attach examples and any supporting
  information.  This should include a description of analysis leading to
  identification of problem and, if known, recommended action.


Beginning July 11, 1993, the atmospheric pressure sensor at the E15
EBBR began indicating approximately 0.2 KPa lower than the colocated SMOS.
Between July 31 and August 22, 1993 the difference increased to between
0.25 and 0.30 KPa.  After August 22, the difference increased to 0.3 to
0.35 KPa and remained that way until December 1, 1993.  A comparison of the
EBBR pressure sensor with the portable standard on December 1, 1993
indicated that the EBBR sensor was 0.04 KPa higher than the standard; this
is excellent agreement considering that the uncertainty of the EBBR sensor
calibration is 0.15 KPa.  The consistent bias in EBBR pressure between July 11
and December 1 can be easily detected in comparisons with SMOS pressure data.
No EBBR data other than pressure was affected by the pressure problem;
calculations of specific heat at constant pressure (which includes the term
1/(p-vp)) times other terms (including p-.378*vp) result in no error to the
third decimal point at least in the resulting Bowen Ratio.  For example;
assume a common vapor pressure (vp) of 2.0 kPa, a common atmospheric pressure
of 97.0 kPa, and a corrupted atmospheric pressure of 96.65 kPa at the extreme.

       Uncorrupted                               Corrupted

(97.0-.378*2.0)/(97.0-2.0) = 1.0131   (96.65-.378*2.0)/(96.65-2.0) = 1.0131

   1.0131/1.0131 = 1.0000    There is no effect on the Bowen Ratio as a
                                       result of the corruption.

Therefore, no correction to the quantities calculated using pressure is
needed.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• temp_reference_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset

SGP/EBBR/E15 - Net Radiometer Hemisphere Changes

The upper hemisphere of the net radiometer at the site was punctured
allowing water to collect in the lower (and sometimes upper) section of the sensor. The 
punctures are most likely the result of migratory birds (a problem that we have experienced 
almost every year here at ANL also). The punctures (and water in some net radiometers) 
did not result in obvious invalidation of the data.

Whether there is water in the lower hemisphere or not, a small puncture of the upper 
hemisphere would not have a major effect on the net radiation measurement.  Significant 
amounts of water in the lower
hemisphere should have a major effect on nighttime measurements particularly, although 
that effect is hard to detect in the data. 
The date when the puncture occurred is approximate - but is certainly 
no more than two weeks before the hemisphere was replaced.

• 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 - Net Radiometer Hemisphere Changes

Incorrect data during hemisphere change.

• 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 - Frozen Wind Speed Instrument

On December 31, 1994 EBBR wind speed instrument froze in place from icing.
Wind speeds increased sufficiently on January 1, 1995 to break the
anemometer free.  The wind direction instrument was not affected.  The times
and fields that are incorrect are shown below.

5 minute:  wind_s, res_ws  12/31 2140 GMT - 1/1 1705 GMT
15 minute: wind_s          12/31 2145 GMT - 1/1 1715 GMT
30 minute: wind_s, res_ws  12/31 2200 GMT - 1/1 1730 GMT

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Battery Voltage Drop, Storage Module Change

For a short period on June 6, 1995 at E15, Ringwood, OK, two events
resulted in a loss of data: replacement of the storage module and a low
battery condition.  The low battery condition apparently affected only the
1815 GMT data output.  All data during this period is missing (1645-1800
GMT) of incorrect (1815-1830).

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_flow_1
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• temp_reference_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset

SGP/EBBR/E15 - Frozen Wind Speed Sensor

On March 7, 1995 freezing rain stopped the cups of the EBBR wind
speed instrument at Ringwood, OK (E15).  All 5, 15, and 30
minute data values indicated below are incorrect for the period indicated.

5 minute:  wind_s, res_ws
15 minute: wind_s
30 minute: wind_s, res_ws

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - AEM Home 15 Values High

Beginning on June 23, 1995, the home 15 value indicated greater than 70 at
times.  This indicates that the home 15 and 30 outputs are somehow being
electronically added in the AEM.  Home 15 values above 70 cause a data quality
message to be output in the site operations log as the stated acceptable range
for home 15 is 35 to 70.  However, no data is incorrect as a result of this
condition.

No replacement AEM is available and site operations was not able to
diagnose the problem.  At present, data quality is not jeopardized.

I will submit another DQR or addendum when successful repair or replacement of
the AEM is accomplished.

• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• base_time
• temp_reference
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_air_top
• Radiation, net(net_radiation)
• vapor_pressure_top
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_air_bottom
• lon
• temp_trh_bottom
• wdir_vec_std
• home_signal
• vapor_pressure_bottom

• lon
• vapor_pressure_top
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• temp_air_bottom
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_heat_capacity_1
• soil_moisture_5
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_moisture_2
• soil_heat_flow_5
• soil_moisture_1
• soil_heat_flow_4
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• temp_reference
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

SGP/EBBR/E15 - AEM Not Exchanging

On August 27, 1995 at approximately 1615 GMT the upper sprocket shaft of the AEM
broke in two, causing the AEM to stop exchanging.  The home signal values
then remained at around 22 for both home_15 and Home_30.  On August 28 site
operations personnel removed the fuse (to prevent exchange) with the left
aspirator in the down position.  The home signal values remained around
-2.3 after that. The AEM will remain in this condition until a replacement
is available.

Therefore, the calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times after August 27, 1995 at 1615 GMT.  The data
fields listed below are incorrect after this time:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
           hum_bot, vp_top, vp_bot, Bowen, e, h

It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data.

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

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

SGP/EBBR/E15 - AEM Replaced

Please see DQR P950908.1, where this problem was first documented.

On August 27, 1995 at approximately 1615 GMT the upper sprocket shaft of the AEM
broke in two, causing the AEM to stop exchanging.  The home signal values
then remained at around 22 for both home_15 and Home_30.  On August 28 site
operations personnel removed the fuse (to prevent exchange) with the left
aspirator in the down position.  The home signal values remained around
-2.3 after that.  On 14 September 1995, site operations personnel replaced
the AEM (serial numbers unknown) and it has operated correctly since then.

The calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for all times during the period listed above.  The data
fields listed below are incorrect:

5 minute:  tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot,
           vp_top, vp_bot

30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top,
           hum_bot, vp_top, vp_bot, Bowen, e, h

It is not possible to reliably calculate the Bowen ratio, e, and h using the
15 minute data.

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

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

SGP/EBBR/E15 - AEM Exchange Stopped in Snow and Freezing Rain

On the night of November 10-11, a north-south line from south central
Kansas through south central Oklahoma received snow and freezing rain and experienced 
below freezing temperatures.  This caused the EBBR automatic exchange mechanism (AEM) to stop 
exchanging temporarily.   

Note that temperatures, relative humidities, and vapor pressures are not affected; these 
are correct as measured, but the height at which the measurements occurred must be 
determined from the home signal value.

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

SGP/EBBR/E15 - Annual calibration changeout

On December 14, 1995 the changeout for annual calibration occurred at E15,
Ringwood, OK.  Between 1650 and 2050 GMT no data was remotely collected.
Furthermore, 5 minute data for 2050 GMT is incorrect, 15 minute data for
2045 GMT is incorrect, and 30 minute data for 2100 GMT is incorrect.
A rather large jump in soil moisture appears in the data after the
installation was completed (the bags holding the probes were soaked with water
before installation).  Soil measurements indicated greater than ambient
soil moisture  until a rain on late 18 December saturated the soil; after this
period the probes reflected actual soil moisture conditions.  The larger than
normal soil moistures have little impact on the small soil heat flux during
this time of year, and thus no significant affect on computed sensible and
latent heat fluxes.

• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• base_time
• temp_reference
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• vapor_pressure_top
• time_offset
• rh_bottom_fraction
• temp_air_bottom
• lon
• temp_trh_bottom
• wdir_vec_std
• home_signal
• vapor_pressure_bottom

• vapor_pressure_top
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• temp_air_bottom
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• soil_heat_flow_1
• bowen_ratio
• Radiation, net(net_radiation)
• soil_moisture_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_moisture_2
• soil_heat_flow_5
• soil_moisture_1
• soil_heat_flow_4
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• lat
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• temp_trh_bottom
• soil_heat_capacity_5
• time_offset
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• temp_reference
• rh_top_fraction
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

SGP/EBBR/E15 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during 18-19 January
1995 caused the wind speed sensor cups to freeze in a stopped state at E15,
Ringwood, OK on 18 January 1995.  When temperatures rose to above freezing on
19 January, the ice thawed and the cups turned freely again.

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws

15 minute: wind_s

30 minute: wind_s, res_ws

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)

• Wind speed, lower, 1-min avg(wspd_arith_mean)

SGP/EBBR/E15 - Reprocess: Soil Temperature Probe Malfunction

Malfunction of soil temperature probe #3 at 157, Ringwood, OK resulted in
incorrect data values for 7 fields for the period of time listed above.  The
soil temperature value from probe #3 went offscale, resulting in a zero value
for the soil energy storage term calculated from that probe and thus no
contribution to the total soil heat flux for soils set 4 and the same for
average soil heat flux.  This led to incorrect sensible and latent heat
flux values.  The probe may have become disconnected during the 20 December
site operations preventative maintenance visit.  However, it also had
rodent chew damage and so was removed and replaced.

The fields that are incorrect are:

30 minute: ts3, ces3, g3, ave_shf, e, h

15 minute: rr_ts3.

Soil temperature probe #3 was replaced at 2030 GMT on 16 January 1996.
The old S/N was 95043, the new S/N is 93018.  Sensible and latent heat fluxes
can be recomputed by averaging the soil heat flux from the four sets of
functioning soil probes; use the following equations:

ave_shf = (g1 + g2 + g4 + g5)/4

e = -(q +ave_shf)/(1 + bowen)

h = e * bowen,

where g is total soil heat flow, q is net radiation, and bowen is Bowen
Ratio.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_3
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• Soil temperature mean 3(soil_temp_3)
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• energy_storage_change_3

• soil_temp_3_rr

SGP/EBBR/E15 - Battery Voltage Drop

From the installation of the changeout unit at E15 on 15 December 1995, the
battery exhibited a slow decline in voltage. However, after a day of the
AEM not operating, site operations restarted the AEM on 20 December 1995 and
the battery condition declined more rapidly, such that the solar panel was not
able to keep the battery voltage up (greater than 11 V DC) for nighttime
conditions, even after a cloudless day.  Battery voltage first dropped below 11
volts at 0635 GMT on 21 December.  I requested that the solar panel voltage
regulator be tested.  On 16 January 1996, site operations found that the
fuse in the solar panel voltage regulator was loose.  After the fuse was
repositioned, the battery voltage increased almost immediately to 13.5
volts and has been good since.

All data for the periods above should be considered incorrect; many sensors
require at least 11 volts DC power and the performance of the CR10 data
logger can not be trusted at less than 11 volts.

• base_time
• temp_reference
• temp_air_top
• Radiation, net(net_radiation)
• rh_top_fraction
• time_offset
• rh_bottom_fraction
• temp_trh_bottom
• vapor_pressure_bottom
• Wind speed vector mean(wspd_vec_mean)
• lat
• temp_trh_top
• Barometric Pressure(atmos_pressure)
• alt
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• vapor_pressure_top
• temp_air_bottom
• lon
• wdir_vec_std
• home_signal

• vapor_pressure_top
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• temp_trh_top
• temp_air_top
• temp_air_bottom
• soil_moisture_5
• soil_moisture_2
• soil_moisture_1
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• lat
• Soil temperature mean 3(soil_temp_3)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• rh_top_fraction
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• lon
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• surface_soil_heat_flux_5
• surface_soil_heat_flux_3
• Barometric Pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• soil_heat_flow_1
• Radiation, net(net_radiation)
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• base_time
• alt
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• temp_reference
• wdir_vec_std

• soil_heat_flow_1_mv
• battery_voltage
• temp_trh_right_rr
• soil_moisture_5_r
• temp_trh_left_rr
• atmos_pressure_mv
• soil_temp_2_rr
• temp_air_left
• soil_moisture_1_r
• lon
• soil_moisture_3_r
• temp_reference_rr
• wdir_vec_mean_mv
• rh_right_mv
• soil_temp_4_rr
• soil_temp_5_rr
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• home_signal
• soil_temp_1_rr
• soil_heat_flow_3_mv
• base_time
• soil_heat_flow_2_mv
• soil_heat_flow_4_mv
• net_radiation_mv
• alt
• soil_moisture_4_r
• soil_moisture_2_r
• temp_air_right
• rh_left_mv
• soil_temp_3_rr
• lat
• soil_heat_flow_5_mv
• time_offset

SGP/EBBR/E15 - 3-month check

During EBBR 3-month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during this period, at least,
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h),
or latent heat flux (e), nor do the air temperature and relative humidity
measurements indicate gradients.  Checks performed before or after the AEM
is disabled also lead to some incorrect data.  The period of incorrect
data for the EBBR is listed above; data times affected do not include the
beginning time and do include the ending time (data files are denoted by
the end time).