SGP/EBBR - EBBR E20 Data Incorrect from SHF #5

something, since the problem began during J-panel changeout the 4/7/99 PM.
At the 7/21/99 PM, the reference temperature was repaired and reseated.  At
that time the SHF #5 data became correct again; the two events are probably
related only in that other connections, including that of the SHF #5, were
probably reseated at the same time.  The report of the PM activity is not
detailed enough to determine the exact causes and fixes.

The incorrect SHF #5 data can be identified by it being an order of 
magnitude larger than the values from the other soil heat flow sensors.

Affected data are:

5 minute:  none
15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h

• soil_heat_flow_5_mv

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

SGP/EBBR - EBBR E20 Thermocouple Data Incorrect

Left and right thermocouple air temperature data are incorrect during the
replacement of the right thermocouple.

Affected data are:

5 minute:  tair_bot, tair_top
15 minute: tai_r, tair_l
30 minute: tair_bot, tair_top, e, h, bowen

• temp_air_top
• temp_air_bottom

• temp_air_right
• temp_air_left

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

SGP/EBBR - EBBR E20 Right Air Temperature Incorrect

The right air temperature (thermocouple) output was frequently offscale.
Examination of the 15 minute data will clearly show which times are
affected during the period.

The affected data are:

5 minute:  tair_top, tair_bot
15 minute: tair_r
30 minute: tair_top, tair_bot, bowen, h, e

• temp_air_top
• temp_air_bottom

• temp_air_right

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

SGP/EBBR - EBBR E20 Left Air Temperature Incorrect

Left air temperature (thermocouple) was incorrect during part of the period,
thereby affecting top and bottom air temperature.

The affected data and times are:

5 minute:  tair_top (1935 GMT)
15 minute: tair_l (1945 GMT)
30 minute: tair_top, bowen, e, h (2000 GMT)

• temp_air_top

• temp_air_left

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

SGP/EBBR/E20 - EBBR E20 Wind Speed Iced

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

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

• 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)

SGP EBBR E20 - E20 EBBR Soil Heat Flow #3 Incorrect

Soil Heat Flow #3 was incorrect during the indicated periods.
Average soil heat flux, latent heat flux, and sensible heat
flux were therefore also incorrect.

• soil_heat_flow_3_mv

• corr_soil_heat_flow_3
• soil_heat_flow_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• 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)

SGP EBBR E20 - E20 EBBR Right Air T Incorrect

The right air temperature probe was incorrect while
connections for it were checked.  Bowen ratio, sensible 
heat flux, and latent heat flux were incorrect as a result.

• vapor_pressure_top
• temp_air_top
• temp_air_bottom
• vapor_pressure_bottom

• temp_air_right

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

SGP EBBR E20 - E20 EBBR Right Air T Incorrect

The right air temperature probe was incorrect frequently.  Inspection of
the right air temperature data will quickly show where it went offscale.
Bowen ratio, sensible heat flux, and latent heat flux were incorrect as a result.

• vapor_pressure_top
• temp_air_top
• temp_air_bottom
• vapor_pressure_bottom

• temp_air_right

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

SGP EBBR E20 - E20 EBBR Soil Temperatures Incorrect

All soil temperatures were incorrect for the indicated period.  
Latent and sensible heat fluxes were therefore incorrect also.

• soil_temp_2_rr
• soil_temp_4_rr
• soil_temp_3_rr
• soil_temp_1_rr
• soil_temp_5_rr

• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• soil_temp_3
• soil_temp_4
• soil_temp_5
• soil_temp_1
• soil_temp_2
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_heat_capacity_1

SGP EBBR E20 - E20 EBBR Data Incorrect During STP #3 Replacement

All data was incorrect during replacement of soil temperature 
probe #3.

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

• Raw data stream - documentation not supported

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

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

SGP EBBR E20 - E20 EBBR Data Incorrect After Program Restart

All data was incorrect after a datalogger program restart.

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

• Raw data stream - documentation not supported

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

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

SGP EBBR E20 - E20 EBBR Some Data Incorrect

Quantities requiring a starting value were incorrect; sensible and latent heat 
fluxes were therefore incorrect also.

• energy_storage_change_1
• surface_soil_heat_flux_5
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• surface_soil_heat_flux_2
• energy_storage_change_4
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• 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)

SGP EBBR E20 - E20 EBBR Data Incorrect

Data was incorrect right after a datalogger upgrade.

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

• Raw data stream - documentation not supported

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

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

SGP EBBR E20 - E20 EBBR Data Incorrect

The data was incorrect because battery voltage was low.

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

• Raw data stream - documentation not supported

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

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

SGP EBBR E20 - E20 EBBR Net Radiation Data Incorrect

The net radiation data was incorrect while the top dome was being replaced.
Sensible and latent heat fluxes are therefore also incorrect.

• Radiation, net(net_radiation)

• 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)

SGP EBBR E20 - E20 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

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

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

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

SGP EBBR E20 - E20 EBBR Soil Temperature #3 Incorrect

The indicated measurements were incorrect while soil temperature probe #3
was not working.

• soil_temp_3_rr

• soil_heat_capacity_3
• energy_storage_change_3
• surface_soil_heat_flux_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_temp_3
• 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)

SGP EBBR E20 - E20 EBBR Soil Heat Flow #2 Incorrect

Broken leads for SHF #2 caused measurements from it to be
incorrect during the indicated period.

• soil_heat_flow_2_mv

• surface_soil_heat_flux_2
• soil_heat_flow_2
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP EBBR E20 - E20 EBBR Battery Voltage Low, Incorrect Data

Some measurements were incorrect because the battery voltage was low.

• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_heat_flow_4_mv
• soil_heat_flow_5_mv
• soil_temp_4_rr
• soil_heat_flow_2_mv
• soil_heat_flow_1_mv
• soil_temp_3_rr
• soil_temp_1_rr
• soil_temp_5_rr

• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• 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)
• 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
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• soil_temp_3
• soil_temp_4
• soil_temp_5
• soil_temp_1
• soil_temp_2
• soil_heat_flow_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP EBBR E20 - E20 EBBR Battery Voltage Low, Data Incorrect

The indicated data was incorrect because the battery voltage was low.

• soil_temp_2_rr
• soil_heat_flow_3_mv
• soil_heat_flow_4_mv
• soil_heat_flow_5_mv
• soil_temp_4_rr
• soil_heat_flow_2_mv
• soil_heat_flow_1_mv
• soil_temp_3_rr
• soil_temp_1_rr
• soil_temp_5_rr

• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• 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)
• 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
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• soil_temp_3
• soil_temp_4
• soil_temp_5
• soil_temp_1
• soil_temp_2
• soil_heat_flow_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect

During the indicated period, TS #3 was large negative or positive or offscale.
Average soil heat flow, sensible heat flux, and latent heat flux were incorrect
when TS #3 was incorrect. Inspect the 15 and 30 minute TS #3 data to determine 
the times of incorrect data.

• soil_temp_3_rr

• energy_storage_change_3
• surface_soil_heat_flux_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_temp_3
• 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)

SGP EBBR E20 - E20 EBBR Soil Heat Flow #4 Incorrect

The SHF #4 produced large negative values during much of the
period because of a broken lead wire. Inspect the data to 
determine the times of incorrect SHF #4 values.

• soil_heat_flow_4_mv

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

SGP/EBBR/E20 - 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:  1520, 1525, 1530, 1535, 1540, 1545, 1550, 1555, 1600,
           1605
15 minute: 1530, 1545, 1600, 1615
30 minute: 1530, 1600, 1630

(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.

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

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

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

SGP/EBBR/E20 - 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.

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

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

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

SGP/EBBR/E20 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - AEM Hung

The automatic exchange mechanism frequently hung in one position.  The home signals and 
automated qc in the netcdf data files indicate when this occurred.  Bowen ratio, sensible 
heat flux, and latent heat flux are incorrect for this condition.

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - Battery Voltage Low

When the battery voltage is below 10.5 volts, most of the measurements are suspect.

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E20 - Pressure Almost Constant

During the indicated period the pressure went to an almost constant 102 to 105 kPa.  This 
occurred after the replacement of another sensor.  The incorrect pressure values affect 
the sensible and latent heat flux calculations.

• Barometric Pressure(atmos_pressure)

• 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)

SGP/EBBR/E20 - Reprocess: Soil Heat Flow #3 Incorrect During Sensor Changeout

Soil heat flow #3 measurements were incorrect during it's replacement.

Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:
    ave_shf = (g1 + g5)/2
    e = -(q + ave_shf)/(1 + bowen)
    h = -(q + e + ave_shf)

Note: during the time period referenced here, soil heat flow #4 and #2 were also
incorrect.  This quality information is documented in D020717.46, D020717.47 and
D020726.1.

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

SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 Has a Negative Offset

Soil heat flow #2 measurements had a negative offset.  Negative values were too small and 
negative values occurred when positive values should have.  This can occur when there is 
a poor wire connection or a J-panel over-voltage protection device has failed.

Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:
   ave_shf = (g1 + g3 + g4 + g5)/4
   e = -(q + ave_shf)/(1 + bowen)
   h = -(q + e + ave_shf)

• surface_soil_heat_flux_2
• soil_heat_flow_2
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - Reprocess: Soil Heat Flow #4 Incorrect

Soil heat flow #4 was incorrect because it's wires were loose from the connection 
terminals.

Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:
   ave_shf = (g1 + g2 + g3 + g5)/4
   e = -(q + ave_shf)/(1 + bowen)
   h = -(q + e + ave_shf)

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

SGP/EBBR/E20 - Measurements Zero

Most measurements were zero during the indicated periods.  This often happens for the 
first reported data time after a CR10 datalogger restart.

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect

Soil temperature 3 was incorrect during the indicated periods.

Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can 
be recalculated using the remaining good sets of soil sensors as follows:

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

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

h = -(q + e + ave_shf)

• energy_storage_change_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• soil_temp_3
• 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)

SGP/EBBR/E20 - Measurements Incorrect During Sensor Changeout

The replacement of soil heat flow 2 caused the loss of initial soil temperature values 
used in the calculation of CES, G, C, ave_shf, bowen, e, and h.

• energy_storage_change_1
• surface_soil_heat_flux_5
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• surface_soil_heat_flux_2
• energy_storage_change_4
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• 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)
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_heat_capacity_1

SGP/EBBR/E20 - Measurements Incorrect

Many measurements were incorrect because of the lack of an initial 15 minute value to use 
for gradient or soil change of energy storage calculations.

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 and #4 incorrect

Soil heat flow #2 measurements had a negative offset.  Negative values were too small and 
negative values occurred when positive values should have.  This can occur when there is 
a poor wire connection or a J-panel over-voltage protection device has failed.

Soil heat flow #4 was incorrect because it's wires were loose from the connection
terminals.

Average soil heat flow, sensible heat flux, and latent heat flux were affected;
these can be recalculated using the remaining good sets of soil sensors as follows: 
    ave_shf = (g1 + g3 + g5)/3
    e = -(q + ave_shf)/(1 + bowen)
    h = -(q + e + ave_shf)

• corr_soil_heat_flow_4
• surface_soil_heat_flux_2
• soil_heat_flow_2
• surface_soil_heat_flux_4
• soil_heat_flow_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

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/E20 - Data Incorrect during 6 month checks

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

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - Data Zero following logger restarts

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

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

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

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

SGP/EBBR/E20 - REPROCESS: Soil Temperature #2 Incorrect

Soil Temperature #2 was incorrect, apparently
from am loose wire after replacement of the EBBR unit.
The indicated measurements that are calculated using 
soil temperature are also incorrect.

See the work-around below.

• energy_storage_change_2
• surface_soil_heat_flux_2
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_temp_2
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - Change of Energy Storage Incorrect

Because soil temperature measurements were not available 
from the beginning of the half hour, the change in soil 
energy storage could not be calculated and thus is 
incorrect.

There is no fix to this problem. Average Soil Heat Flow, 
Sensible Heat Flux (h), and Latent Heat Flux (e) can not 
be calculated using the available, remaining measurements.

• energy_storage_change_1
• surface_soil_heat_flux_5
• energy_storage_change_3
• energy_storage_change_2
• surface_soil_heat_flux_2
• energy_storage_change_5
• energy_storage_change_4
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• soil_temp_3
• soil_temp_4
• soil_temp_5
• soil_temp_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_temp_2
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E20 - Battery voltage low

When Battery Voltage drops below 10.5 volts, most 
measurements are suspect and some are often incorrect.

The user will need to inspect the data carefully to 
determine the useability of the data.

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

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

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

SGP/EBBR/E20 - Wind speed and direction frozen

Wind Speed and Dierction were frozen in place by an ice storm.

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

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

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

SGP/EBBR/E20 - AEM Hung between Home Positions

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

There is no work-around to this problem.

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - REPROCESS: Heat Flow #3 and #5 Incorrect

Soil Heat Flow #3 was incorrect because part of the lead
wire was cut; apparent vandalism.

Soil Heat Flow #5 had been incorrect because of other
causes, but was replaced at the same time as #3.

• surface_soil_heat_flux_5
• corr_soil_heat_flow_5
• corr_soil_heat_flow_3
• soil_heat_flow_3
• soil_heat_flow_5
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• 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)

SGP/EBBR/E20 - Data incorrect during instrument maintenance

Most of the data was incorrect just after the EBBR unit was replaced.

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

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

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

SGP/EBBR/E20 - REPROCESS: Soil Heat Flow #5 Incorrect

Soil Heat Flow #5 was incorrect during these periods. 
 
See below for a work-around.

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

SGP/EBBR/E20 - REPROCESS: Soil Temperature #1 Incorrect

Soil Temperature #1 was intermittently incorrect.
The cause is unknown. The indicated measurements 
that are calculated using soil temperature are 
also incorrect.

• energy_storage_change_1
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_temp_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - REPROCESS: Soil Temperature #3 Incorrect

Soil Temperature #3 was incorrect.
The cause is apparently vandalism; the probe leads were cut. 
The indicated measurements that are calculated using soil 
temperature are also incorrect.

DQR D030117.19 already provides the work-around for
calculating correct sensible (h) and latent heat (e) fluxes,
as soil heat flow #3 and soil heat flow #5 were also incorrect
during this period.  That work-around is repeated below.

• energy_storage_change_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• soil_temp_3
• 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)

SGP/EBBR/E20 - Resistance-based Measurements Incorrect

When the Reference Temperature in the EBBR 
enclosure is not reported correctly, it
affects all resistance-based measurements
that are adjusted with the temperature of 
the reference junction.

No work-around is possible for this situation.

• temp_air_top
• temp_air_bottom

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - REPROCESS: Net Rad Coefficients Incorrect

The Net Radiometer coefficients were incorrect in the CR10
program when the replacement EBBR unit was installed on
08/09/02.

The data can be easily corrected; see the Suggestion area below.

• Radiation, net(net_radiation)

• 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)

SGP/EBBR/E20 - REPROCESS: Soil Temperature #1 and Soil Heat Flow #5 Incorrect

Soil Temperature #1 and Soil Heat Flow #5 were incorrect
during these periods. The indicated calculated measurements
are also incorrect.

• energy_storage_change_1
• surface_soil_heat_flux_5
• corr_soil_heat_flow_5
• surface_soil_heat_flux_1
• soil_heat_flow_5
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_temp_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - RHtop Zero

The RHtop value in the 30 minute file is zero.  5 and 15 minute files show RHtop 
correctly. This behavior has been seen infrequently and can probably be attributed to a CR10 
communication error.

No other data, including the fluxes, are affected.

• rh_top_fraction

SGP/EBBR/E20 - Soil Heat Flow#5 Incorrect

Soil Heat Flow #5 was producing incorrect values.  Average soil heat flow, sensible heat 
flux, and latent heat flux were affected.

• soil_heat_flow_5_mv

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

SGP/EBBR/E20 - Soil Storage Incorrect After Startup

For the half hour data after CR10 datalogger startup, stored soil temperature values do 
not exist from the beginning of the half hour.  Therefore soil heat storage can not be 
calculated correctly.

This affects numerous measurements that are calculated using soil heat storage.

• energy_storage_change_1
• surface_soil_heat_flux_5
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• surface_soil_heat_flux_2
• energy_storage_change_4
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• 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)

SGP/EBBR/E20 -  6 Month Checks

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

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

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

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

SGP/EBBR/E20 - Fuse Blown in AEM

When the EBBR system restarted on 15 Oct. 2003, the AEM
malfunctioned.  Surface fluxes data during this period
are incorrect.

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - Reprocess: Soil Temperature Probe #1 Measurements Spiked

The soil temperature #1 measurement spiked quite high at times.

This affected a number of measurements that are dependent on the 
soil temperature measurements.

• soil_temp_1_rr

• energy_storage_change_1
• surface_soil_heat_flux_1
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_temp_1
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20  - 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)

• 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)

SGP/EBBR/E20 - 6 Month Checks

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

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

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

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

SGP/EBBR/E20 - Wind Direction Incorrect

Wind direction is incorrect, reading at or about 0 or 15 to 25 degrees.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Pressure Sensor Data Incorrect

The E20 pressure sensor suffered
from spikes in pressure, which were related to 
increases in voltage during the day as the 
solar panels charged the battery.  These spikes
were not of a magnitude that would affect the 
30 minute surface fluxes.

Replacement of the pressure sensor solved the problem.

• Barometric Pressure(atmos_pressure)

• atmos_pressure_mv

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E20  - Wind Speed Sensor Frozen By Ice Storm

The wind speed sensor was frozen stopped by ice from a storm.  The wind speed 
and residual wind speed measurements are incorrect.

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

• 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)

SGP/EBBR/E20  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

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

• 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)

SGP/EBBR/E20  - Wind Direction Frozen Stopped By Ice

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

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

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

SGP/EBBR/E20 - Left Air Temperature Incorrect

The left air temperature, and therefore top and bottom air temperatures
were offscale or incorrect on occasion.  Bowen ratio, sensible heat flux, and latent heat 
flux were also incorrect during those times.

Inspection of the data is required to detect the incorrect periods.

• temp_air_top
• temp_air_bottom

• temp_air_left

• Corrected sensible heat flux(h)
• Heat flux, sensible, best estimate(hcomb)
• Heat flux, latent(e)
• tair_bot
• Heat flux, sensible, aerodynamic(ah)
• Heat flux, latent, aerodynamic(ale)
• Heat flux, latent, best estimate(ecomb)
• tair_top
• bowen

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

SGP/EBBR/E20 - Wind Direction Stuck at 100 Degrees

The wind direction sensor was stuck at about 100 degrees.  This did
not affect the primary measurements (net radiation, soil heat flow, sensible heat flux, 
latent heat flux).

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - AEM Failure

The AEM hung inbetween positions; home signals were zero.

The AEM fuse kept blowing, most likely because of worn
rails or sleeves.  This condition may reoccur.

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

• temp_air_left
• temp_air_right

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

SGP/EBBR/E20 - Soil Heat Flow #3 and Soil Temperature #3 Incorrect

• soil_temp_3_rr
• soil_heat_flow_3_mv

• energy_storage_change_3
• corr_soil_heat_flow_3
• soil_heat_flow_3
• surface_soil_heat_flux_3
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_temp_3
• 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)

SGP/EBBR/E20  - All Soil Measurements Incorrect

All soil measurements were incorrect during the replacement of soil heat flow #3 and soil 
temperature #3.

• soil_temp_2_rr
• soil_temp_3_rr
• soil_heat_flow_3_mv
• soil_moisture_1_rr
• soil_heat_flow_4_mv
• soil_heat_flow_5_mv
• soil_moisture_4_rr
• soil_temp_4_rr
• soil_heat_flow_2_mv
• soil_moisture_3_rr
• soil_heat_flow_1_mv
• soil_moisture_2_rr
• soil_temp_1_rr
• soil_temp_5_rr
• soil_moisture_5_rr

• 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_capacity_2
• soil_moisture_4
• soil_heat_capacity_3
• soil_moisture_3
• soil_heat_capacity_4
• soil_moisture_5
• soil_heat_capacity_5
• soil_moisture_2
• soil_heat_capacity_1
• soil_moisture_1
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• surface_soil_heat_flux_3
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• energy_storage_change_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• soil_temp_3
• soil_temp_4
• soil_temp_5
• soil_temp_1
• soil_temp_2
• soil_heat_flow_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_heat_flow_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)

SGP/EBBR/E20 - 6 Month Checks

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

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

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

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

SGP/EBBR/E20 - Soil Moisture #4 and Soil Temperature #4 Incorrect

Failures of a multiplexer channel and a J-panel channel caused soil temperature #4 and 
soil moisture #4 to spike and drift at times.  Replacement of the failed equipment solved 
the problem.

• soil_moisture_4_rr
• soil_temp_4_rr

• soil_moisture_4
• soil_heat_capacity_4
• corr_soil_heat_flow_4
• energy_storage_change_4
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_temp_4
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)

SGP/EBBR/E20 - Soil Heat Flow #4 Incorrect

Soil Heat Flow #4 was missing or offscale and therefore incorrect during the stated 
period.

• soil_heat_flow_4_mv

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

SGP/EBBR/E20  - Wind Speed Frozen Stopped By Ice Storm

An ice storm froze the wind speed sensor to a stopped condition.

The wind speed and residual wind speed measurements are incorrect.

This sensor failure does not affect the sensible and latent heat fluxes.

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

• 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)

SGP/EBBR/E20  - Wind Direction Frozen Stopped By Ice Storm

The wind direction sensor was frozen stopped by ice from a storm.  
The wind direction, sigma_wd, and residual wind speed measurements 
are incorrect.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Wrong Datalogger Program Installed

ts4 went offscale and sm4 dropped to a constant 16% when a "new" program
was installed on 3/30/05.  The wrong program was installed.

Because ts4 did not change with time, it did not mess up the calculation
of e and h.  e and h are slightly overestimated, but only by about 1%,
far less than the system error. This is a rare type of instrument problem where the 
concequences are minimal.

Therefore, e and h are not listed as incorrect in this DQR and are still usable during the 
stated period.

• soil_moisture_4
• soil_heat_capacity_4
• corr_soil_heat_flow_4
• energy_storage_change_4
• surface_soil_heat_flux_4
• soil_temp_4

SGP/EBBR/E20 - Temp. of thum_left Incorrect At Times

The temperature portion of the left T/RH probe temperature spiked at times.  This was 
caused by a faulty surge protector in the J-Panel.

• vapor_pressure_top
• temp_trh_top
• temp_trh_bottom
• vapor_pressure_bottom

• temp_trh_left_rr

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

SGP/EBBR/E20 - Improved EBBR CR10 Program

Effective 20050330.1900, the EBBR.E20 CR10 program was revised to improve 
the quality of the primary measurements as follows:
   
1) An RMS procedure is used to determine max and min limits of acceptable
soil heat flow.  This is applied to the individual soil sets.  Measurements
outside the limits are rejected and the measurements within the limits are
used to calculate the average soil heat flow.
   
2) Max and min limits are used to determine incorrect values of net
radiation, sensible heat flux (h), latent heat flux (e), and automatic
exchange mechanism (AEM) signal.  If AEM signal is outside the limits, h 
and e are set to 999s.  If net radiation is outside the limits, h and e are 
set to 999s. If h or e are outside the limits, h and e are set to 999s.
   
Virtually no incorrect soil measurement will affect the primary 
measurements of h and e.
   
By setting h and e to 999s, it can be easily seen that the primary 
variables are incorrect; no other interpretation is possible.
   
Prior to 20050330, the improved CR10 program was NOT in effect.  DQRs have
been submitted for known instances of incorrect soil measurements which
affected the quality of the primary measurements of h and e.
   
Note: the DQR begin date is the begin date of the sgp30ebbrE20.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE20.a1).

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

SGP/EBBR/E20 - Soil Temperature and Soil Moisture  #4 Measurements Incorrect

The ts4 sensor reported 99999 values because the sensor leads were loose.  Soil moisture 
#4 reported low values (steady 16%) during this time period.

The sensible and latent heat fluxes were not affected by this problem, only
soil temperature and soil moisture #4.  See soil temperatures and soil moistures from sets 
#2, #3, and #5 for correct values (note: soil temperature #1 was having problems during 
the same time).

• soil_moisture_4_rr
• soil_temp_4_rr

• soil_moisture_4
• soil_heat_capacity_4
• energy_storage_change_4
• surface_soil_heat_flux_4
• soil_temp_4

SGP/EBBR/E20 - Average Soil Heat Flux Incorrect

A typo in the version 9 EBBR program caused average soil heat flow to be zero, resulting 
in both sensible and latent heat fluxes being approximately 20 watts per meter squared too 
large during the middle of the day.

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

SGP/EBBR/E20 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E20 data collected by ARM back to the installation of the 
instrument in April 1993. Please see the current metadata for correct information.  These 
changes do not
affect data values or quality.	

The changes are summarized below:
1) Update of "sensor location" information
2) Addition of installation dates for the systems
3) Correction of soil moisture units (from "by volume" to "gravimetric")

• base_time

• base_time

• base_time

SGP/EBBR/E20 - Data Incorrect During J-Panel Replacement

Much of the data was incorrect during replacement of J-Panel #1.

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

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

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

SGP/EBBR/E20 - Suspect Measurements

Some measurements may be incorrect because of low supply voltage.

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

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

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

SGP/EBBR/E20 - Net Radiation, Fluxes Too Large

Net Radiation was way too large because of water in the bottom dome.
This resulted in the sensible and latent heat fluxes being too large also.

• Radiation, net(net_radiation)

• 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)

SGP/EBBR/E20 - 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):

0-230, 310-360

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.

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

SGP/EBBR/E20 - Reprocess: Wind Direction 20 Degrees Low

The EBBR wind direction was found to be misaligned 20 degrees low. 

This bias should have had no effect on the res_ws or sigma_wd measurements.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Reprocess: Wind Direction 65 Degrees Low

The wind direction sensor reported wind directions that were 65 degrees too low because of 
a mis-alignment.

This bias should have no effect on the res_ws or sigma_wd measurements.

The wind direction data could be re-processed by adding 65 degrees.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Wind Direction 50 Degrees High

The wind direction was offset high about 50 degrees.

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Wind Direction Incorrect

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

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

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

• wdir_vec_mean_mv

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

SGP/EBBR/E20 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

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

• 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)

SGP/EBBR/E20 - Wind Direction Incorrect

The wind direction measurement was stuck at 40 degrees.

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

• wdir_vec_mean_mv

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