SGP/EBBR - EBBR E18 Right Humidity Incorrect

After the 3 December 99 lightning strike, the humidity portion of the 
right T/RH probe drifted downwards at times, causing vapor pressure 
gradients to be incorrectly measured.  Therefore, sensible and latent
heat fluxes were also incorrect.  Since much of the data from the period
is missing (because of latent effects of the lightning strike), little
data is actually affected. 

The affected data values were:

5 minute:  hum_top, hum_bot, vp_top, vp_bot
15 minute: mv_hum_r
30 minute: hum_top, hum_bot, vp_top, vp_bot, bowen, h, e

• rh_right_mv

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

• rh_bottom_fraction
• vapor_pressure_top
• vapor_pressure_bottom
• rh_top_fraction

SGP/EBBR - EBBR E18 Data Incorrect After Lightning Strike

Immediately after the 3 December 99 lightning strike, all data from this 
EBBR system was incorrect.  The system crashed at the end of this period.

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

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

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

SGP/EBBR - EBBR E18 Much Data Missing After Lightning Strike

On 3 December 99 this EBBR system was struck by lightning.  Much of the 
data from this EBBR system for the stated period is missing.

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

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

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

SGP/EBBR - EBBR E18 Net Radiation Incorrect

The net radiometer top dome was broken and water had entered.  Net 
radiation values are therefore incorrect during the period.

The affected data are:

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

• net_radiation_mv

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

• Radiation, net(net_radiation)

SGP/EBBR/E18 - EBBR E18 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, 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)

SGP/EBBR/E18 - EBBR E18 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, 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)

SGP/EBBR/E18 - E18 EBBR Data Incorrect

The EBBR data was incorrect during maintenance.

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

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

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

SGP/EBBR/E18 - E18 EBBR Right RH Incorrect

Right RH being incorrect caused a number of calculated measurements to be
incorrect also, including Bowen ratio, and latent and sensible heat fluxes.

• temp_trh_right_rr
• rh_right_mv

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

• rh_bottom_fraction
• vapor_pressure_top
• rh_top_fraction
• vapor_pressure_bottom

SGP/EBBR/E18 - E18 EBBR Thum Right Incorrect

The temperature portion of the right T/RH probe was not working.  Calculated
vapor pressure, Bowen ratio, and sensible and latent heat fluxes were also incorrect.

• temp_trh_right_rr

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

• temp_trh_top
• temp_trh_bottom
• vapor_pressure_top
• vapor_pressure_bottom

SGP/EBBR/E18 - E18 EBBR Data Incorrect

The EBBR data was incorrect while the datalogger was being upgraded/replaced.

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

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

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

SGP/EBBR/E18 - E18 EBBR Data Incorrect

The EBBR data was incorrect just after power was restored.

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

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

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

SGP EBBR E18 - E18 EBBR Wind Direction Frozen

The wind direction sensor was frozen stopped.  The indicated measurements are incorrect as 
a result.

• wdir_vec_mean_mv

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

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

SGP EBBR E18 - E18 EBBR Wind Direction Frozen

The wind direction sensor was frozen stopped.  The indicated measurements are incorrect as 
a result.

• wdir_vec_mean_mv

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

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

SGP EBBR E18 - E18 EBBR Left Ventilator Fan Not Working

The left ventilator fan was not working.  Some of the indicated measurements may be 
incorrect (under some wind speed and direction conditions, cloud cover, and time of day, some 
of the data may be correct).  The data is therefore described as suspect for the indicated 
period.

• temp_trh_left_rr
• temp_air_left
• rh_left_mv

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

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

SGP EBBR E18 - E18 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

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

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

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

SGP EBBR E18 - E18 EBBR AEM Frozen, Data Incorrect

The AEM was frozen in one position. The  indicated data is incorrect.

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

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

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

SGP EBBR E18 - E18 EBBR Wind Direction Frozen, Data Incorrect

The wind direction sensor was frozen stopped.  
The indicated data is incorrect.

• wdir_vec_mean_mv

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

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

SGP EBBR E18 - E18 EBBR Wind Speed Frozen, Data Incorrect

The wind speed sensor was frozen stopped.  The indicated data are incorrect.

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

SGP EBBR E18 - E18 EBBR Right RH Incorrect

The RH portion of the T/RH probe produced incorrect data.
Sensible and latent heat fluxes and the Bowen ratio were
also incorrect.

• temp_trh_right_rr
• rh_right_mv

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

• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• vapor_pressure_top
• rh_top_fraction
• vapor_pressure_bottom

SGP/EBBR/E18 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

• temp_air_right
• temp_air_left

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

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

SGP/EBBR/E18 - AEM Hung

The automatic exchange mechanism did not work properly for a number of time periods.  The 
Bowen ratio, latent heat flux, and sensible heat flux were incorrect also during this 
condition.

• temp_air_right
• temp_air_left

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

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

SGP/EBBR/E18 - Left Air Temperature Incorrect

The left air temperature was incorrect much of the time, causing the Bowen ratio, sensible 
heat flux, and latent heat flux to be incorrect also.

• temp_air_left

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

• temp_air_bottom
• temp_air_top

SGP/EBBR/E18 - Reference Temperature Incorrect

The reference temperature was incorrect during the checks of the left air temperature 
sensor, leading to all gradient measurements, Bowen ratio, sensible heat flux, latent heat 
flux, soil temperature, and soil moisture measurements being incorrect.

• temp_air_right
• temp_air_left

• Soil temperature mean 1(soil_temp_1)
• soil_moisture_4
• Soil temperature mean 2(soil_temp_2)
• soil_moisture_5
• Soil temperature mean 3(soil_temp_3)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 5(soil_temp_5)
• energy_storage_change_5
• temp_reference
• energy_storage_change_3
• energy_storage_change_4
• energy_storage_change_1
• energy_storage_change_2
• temp_air_top
• soil_moisture_3
• soil_moisture_2
• soil_moisture_1
• soil_heat_capacity_5
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_capacity_4
• soil_heat_capacity_3
• temp_air_bottom
• 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)

• temp_air_top
• temp_trh_top
• temp_trh_bottom
• temp_air_bottom

SGP/EBBR/E18 - Data Incorrect during 6 month checks

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

• temp_air_right
• temp_air_left

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

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

SGP/EBBR/E18 - Data Mostly Zero Following Logger Restart

Most of the measurements were zero, which normally happens after a 
datalogger restart.  The restart on 11/12/02 occurred after replacement
of soil heat flow #1.

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

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

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

SGP/EBBR/E18 - AEM Hung

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

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

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

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

SGP/EBBR/E18 -  6 Month Checks

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

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

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

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

SGP/EBBR/E18  - Water in Net Radiometer; Surface Fluxes are 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.

• net_radiation_mv

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

• Radiation, net(net_radiation)

SGP/EBBR/E18 - 6 Month Checks

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

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

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

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

SGP/EBBR/E18 - AEM Sitting At Home 15 Position

After replacement of the AEM on 1/26/04, it exchanged
briefly, then sat at the home 15 position until another 
replacement was available.

• temp_air_right
• temp_air_left

• thum_bot
• hum_bot
• Heat flux, sensible, aerodynamic(ah)
• Corrected sensible heat flux(h)
• tair_bot
• hum_top
• Heat flux, latent(e)
• vp_bot
• Heat flux, latent, aerodynamic(ale)
• thum_top
• bowen
• Heat flux, sensible, best estimate(hcomb)
• vp_top
• Heat flux, latent, best estimate(ecomb)
• tair_top

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

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

SGP/EBBR/E18  - 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, 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)

SGP/EBBR/E18  - 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)
• wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)

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

SGP/EBBR/E18 - Pressure Low

Pressure readings suddenly dropped to unrealistic levels.

Sensible Heat Flux was underestimated and Latent Heat Flux
was overestimated because of this problem.

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

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E18 - 6 Month Checks

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

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

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

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

SGP/EBBR/E18  - 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, 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)

SGP/EBBR/E18  - 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.

• wdir_vec_mean_mv

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

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

SGP/EBBR/E18 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect

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

• net_radiation_mv

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

• Radiation, net(net_radiation)

SGP/EBBR/E18 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E18 data collected by ARM back to the installation of the 
instrument in July 1997. 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/E18 - Wind Speed Zero

Wind Speed was zero, presumably because the sensor was frozen stopped during freezing 
rain.

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

SGP/EBBR/E18 - Sensible and Latent Heat Fluxes and Net Radiation Incorrect

The net radiometer dome was cracked and water had gotten in, resulting in incorrect net 
radiation measurements and therefore incorrect sensible and latent heat flux measurements.

• net_radiation_mv

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

• Radiation, net(net_radiation)

SGP/EBBR/E18 - Wind Speed Incorrect

The wind speed sensor was frozen stopped and thus wind speed was incorrect
during this period.

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

SGP/EBBR/E18 - 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 these periods 
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 correct gradients.  Checks performed before 
or after the AEM is disabled also lead to some incorrect data.  Incorrect 5,
15 minute and half hour data occurs for the period above.

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

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

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

SGP/EBBR/E18 - Six Month Checks

During EBBR 6 month checks (formally called 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 these periods 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 correct gradients.  Checks 
performed just before or after the AEM is disabled also lead to some 
incorrect data.  Incorrect 5, 15 minute and half hour data occurs for the 
period above.

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

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

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

SGP/EBBR/E18 - Reprocess: E18 EBBR Net Radiometer Calibration

When the CR10 program was loaded in the storage module of the newly 
installed EBBR unit at E18 on 10 September 1997, an incorrect 
calibration for the net radiometer was present.  The incorrect calibration
had apparently been entered into the storage module by the vendor before
the unit was shipped.  The .DOC file showed the correct calibration; 
therefore, we did not suspect a problem until comparisons with 
radiometers at other sites nearby were performed.  The program with the 
correct calibration was entered on 18 June 1998.  The 15 minute mv_q 
values were not affected.  The 5 and 30 minute q values during the period
above need to be corrected; multiply positive q values by 0.684, multiply 
negative values by 0.811; Sensible (h) and Latent Heat (e) fluxes for the
period need to be recalculated with the equations below.

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

h = -(e + ave_shf + q)

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

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

SGP/EBBR/E18 - Water In Net Radiometer, Flux Data Incorrect

Incorrect Net Radiation values resulted from water in the bottom dome.
Thus incorrect sensible and latent heat fluxes resulted. Affected values
are:

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

• net_radiation_mv

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

• Radiation, net(net_radiation)

SGP/EBBR/E18 - Wind Direction Data Incorrect (revised)

The wind direction sensor was iced stopped by freezing rain, 
resulting in the following values being incorrect:

5 minute:  res_ws, wind_d, sigma_wd
15 minute: mv_wind_d
30 minute: res_ws, wind_d, sigma_wd

• wdir_vec_mean_mv

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

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

• Raw data stream - documentation not supported

SGP/EBBR - EBBR E18 Wind Speed Data Incorrect

The wind speed sensor was iced stopped by freezing rain, 
resulting in the following values being incorrect:

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

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

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

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

• Raw data stream - documentation not supported

SGP/EBBR/E18 - Wind Speed Data Incorrect

The wind speed sensor was iced stopped by freezing rain, 
resulting in the following values being 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, 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)

• Raw data stream - documentation not supported

SGP/EBBR/E18 - Wind Speed Data Incorrect

The wind speed sensor was iced stopped by freezing rain, 
resulting in the following values being 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, 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)

• Raw data stream - documentation not supported

SGP/EBBR/E18 - Pressure Incorrect

The pressure sensor was replaced at E18 EBBR without the replacement being
noted by Site Ops and therefore without an indication of serial number and
thus correct calibration. The serial number of the sensor was observed 
during a PM (after months of confusion concerning the thing) and a several
month search for the calibration sheet at ANL, the CF, and the manufacturer
ensued.  The sheet was finally found and I confirmed that an incorrect
offset was being used (the same as used for the previous sensor). This is
an easy error to make as there are two models of pressure sensors (with
different calibration ranges) being used in the EBBR systems.  On June
17, 1999 the correct offset was entered into the CR10 and storage module
programming.  The pressure for the period should be increased by 6.757 kPa.
The result of the error is that Bowen ratio was underestimated by 6.8% on
average, Latent Heat Flux was overestimated by 3.6% on average, and Sensible
Heat Flux was underestimated by 3.6% on average.  The errors in the fluxes 
are smaller than the estimated 10% error in the Bowen ratio flux 
measurement technique and therefore the data does not need to be reprocessed.
Anyone performing area averages of pressure or looking at the variation in 
pressure over the CART Site should adjust the E18 EBBR pressure values for this
period using the offset error indicated above.

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

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

• Raw data stream - documentation not supported