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

An anemometer cup fell off.

The following values were therefore incorrect:

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

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

SGP/EBBR - EBBR E12 Anemometer Cups Frozen, Wind Speed Incorrect

The anemometer cups were frozen stalled during this period.

The following values were therefore incorrect:

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

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

SGP/EBBR - EBBR E12 Net Radiation Incorrect

Condensation inside the domes (possibly water in the bottom dome also) 
during the period made daytime net radiation values as much as 50% too 
large and nighttime net radiations as much as 100% too small.  

The affected data are:

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

• Latent heat flux(latent_heat_flux)
• Sensible heat flux(sensible_heat_flux)
• Net radiation(net_radiation)

SGP/EBBR- EBBR E15 Air Temperatures Incorrect

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

Affected data values were:

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

• vapor_pressure_top
• temp_trh_top
• temp_reference
• temp_air_bottom
• Latent heat flux(latent_heat_flux)
• bowen_ratio
• temp_trh_bottom
• temp_air_top
• Sensible heat flux(sensible_heat_flux)
• vapor_pressure_bottom

SGP/EBBR - EBBR E13 Left Aspirator Not Working

A loss of the 12V DC power to the left aspirator caused it to stop
operating.  The affected measurements are:

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, h, e

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR - EBBR E12 Net Radiation Incorrect

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

The affected data are:

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

• Latent heat flux(latent_heat_flux)
• Sensible heat flux(sensible_heat_flux)
• Net radiation(net_radiation)

SGP/EBBR - EBBR E13 Net Radiation Incorrect

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

The affected data are:

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

• Sensible heat flux(sensible_heat_flux)
• Net radiation(net_radiation)
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - failure of sensors

A lightning strike to the central cluster area shortly after 0800 GMT
on July 17 caused failure of several EBBR sensors: both humidity probes,
the barometer, soil heat flux #3, soil moisture # 1 and the wind
direction.
These failed sensors caused sensible, latent, and average soil heat flux
to be incorrect until site operations performed maintenance on July 24th.

Site Operations found a loose connection from soil moisture probe #1, 
removed barometer SN 6578 and replaced it with SN 6507, removed soil heat 
flux sensor #3 with SN 923022 and replaced it with SN 933199, repositioned 
the wind direction sensor - which was rotated approximately ninety degrees 
clockwise from its proper position, and removed the right humidity probe 
SN 460412 and replaced it with SN 460428.

• vapor_pressure_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Failed Right Humidity Probe

A lightning strike to the central cluster area on 17 July 1995 caused
failure of several EBBR sensors including the right humidity probe.
On July 24th, site operations removed the right humidity probe SN 460412 and 
replaced it with SN 460428

In less than a day the right humidity probe output soared to over 113% and
has hovered around 112% since.  I consider all right probe values to be
incorrect due to this behavior.

Without a properly functioning right humidity probe, all values of top and
bottom relative humidity, top and bottom vapor pressure, Bowen
ratio, and latent and sensible heat fluxes are incorrect.

A working spare relative humidity probe was not available at that time.
The probe was replaced with a working, calibrated probe on 22 September 1995
at about 2108 GMT.  I have the examined the data since the day of the
replacement and find that the new probe is working well.  All E13 EBBR
measurements are presently correct.  The old probe S/N was 460428, the new
S/N is 460413.

• vapor_pressure_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13- Left humidity probe replaced

A lightning strike to the central cluster area on 17 July 1995 caused the
left humidity probe to fail.  Some of the period of incorrect data has been
 discussed in D0000531.4.  The left humidity probe was replaced on 25 July 
1995 at 1925 GMT (old SN 460413, new SN 460435).

• vapor_pressure_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E12 - EBBR E12 Wind Speed Iced

The anemometer was frozen stopped by freezing rain; the indicated data is incorrect.

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

SGP/EBBR/E12 - EBBR E12 Wind Speed Iced

The anemometer was frozen stopped by freezing rain; the indicated data is incorrect.

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

SGP/EBBR/E15 - EBBR E15 Wind Speed Iced

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

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

SGP/EBBR/E12 - E12 EBBR Wind Direction Incorrect

The wind direction vane was frozen stopped in one direction by icing.

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

SGP/EBBR/E12 - E12 EBBR Wind Speed Incorrect

The wind speed sensor cups were frozen stopped by icing.

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

SGP/EBBR/E12 - E12 EBBR AEM Stuck - Data Incorrect

The AEM became stuck between levels, causing all gradient measurements to be incorrect, 
and thus the latent and sensible heat fluxes and Bowen ratio.

• bowen_ratio
• temp_air_top
• rh_bottom_fraction
• vapor_pressure_top
• Latent heat flux(latent_heat_flux)
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom
• temp_trh_top
• Sensible heat flux(sensible_heat_flux)

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Low battery voltage caused all data to be incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Low battery voltage caused all data to be incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

All data was incorrect for an unknown reason.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR Heat Capacities Incorrect

The soil heat capacities were incorrect, a result of the missing data from the previous 
half hour.

• soil_heat_capacity_1
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_capacity_3
• soil_heat_capacity_2

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data were incorrect.

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

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR All Data Incorrect

Battery voltage was too low.  All data was incorrect.

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

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR Flux Data Incorrect

The Automatic Exchange Mechanism was stuck inbetween the top and bottom positions.  
Incorrect Bowen ratio, and latent and sensible heat fluxes resulted.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR Soil Temperature #4 Suspect

Soil Temperature #4 produced noisy measurements, resulting in quantities
calculated from it to be of suspect quality.  This condition normally 
occurred early in the GMT day.  Sensible (h) and latent (e) heat fluxes
were not normally greatly affected.  Average surface heat flow was normally
slightly underestimated.

• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_4
• soil_heat_capacity_4
• energy_storage_change_4
• Soil temperature mean 4(soil_temp_4)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - E13 EBBR Wind Direction Iced

The wind direction sensor was iced stopped for the indicated period.

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

SGP/EBBR/E13 - E13 EBBR Soil Heat Flow #4 Incorrect

Soil Heat Flow #4 was large positive or negative, but always
incorrect during the indicated period. This resulted in overestimates
or underestimates of laetnt and sensible heat fluxes and average
soil heat flow.

• Sensible heat flux(sensible_heat_flux)
• soil_heat_flow_4
• surface_soil_heat_flux_4
• corr_soil_heat_flow_4
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E15 - E15 EBBR Reference Temperature Incorrect

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

• temp_reference
• temp_air_bottom
• Latent heat flux(latent_heat_flux)
• bowen_ratio
• temp_air_top
• Sensible heat flux(sensible_heat_flux)

SGP/EBBR/E15 - E15 EBBR Data Incorrect

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

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

SGP/EBBR/E15 - E15 EBBR Data Missing

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

• East longitude(lon)
• vapor_pressure_top
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• surface_soil_heat_flux_3
• Atmospheric pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• temp_air_bottom
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Net radiation(net_radiation)
• soil_heat_flow_1
• soil_moisture_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_moisture_2
• soil_moisture_1
• soil_heat_flow_4
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• North latitude(lat)
• Latent heat flux(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• base_time
• Altitude above mean sea level(alt)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• temp_reference
• rh_top_fraction
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

SGP/EBBR/E15 - E15 EBBR Data Incorrect

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

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

SGP/EBBR/E15 - E15 EBBR Data Missing

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

• East longitude(lon)
• vapor_pressure_top
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• surface_soil_heat_flux_3
• Atmospheric pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• temp_air_bottom
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Net radiation(net_radiation)
• soil_heat_flow_1
• soil_moisture_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_moisture_2
• soil_moisture_1
• soil_heat_flow_4
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• North latitude(lat)
• Latent heat flux(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• base_time
• Altitude above mean sea level(alt)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• temp_reference
• rh_top_fraction
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

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

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

• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_3
• corr_soil_heat_flow_5
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• Latent heat flux(latent_heat_flux)
• corr_soil_heat_flow_1
• soil_heat_flow_1
• energy_storage_change_1
• soil_heat_flow_3
• soil_heat_flow_2
• soil_heat_flow_5
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5

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

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

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

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

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

• vapor_pressure_top
• temp_trh_top
• rh_top_fraction
• rh_bottom_fraction
• temp_air_bottom
• Latent heat flux(latent_heat_flux)
• bowen_ratio
• temp_trh_bottom
• temp_air_top
• Sensible heat flux(sensible_heat_flux)
• vapor_pressure_bottom

SGP/EBBR/E15 - E15 EBBR AEM Replacement

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

• vapor_pressure_top
• temp_trh_top
• rh_top_fraction
• rh_bottom_fraction
• temp_air_bottom
• Latent heat flux(latent_heat_flux)
• bowen_ratio
• temp_trh_bottom
• temp_air_top
• Sensible heat flux(sensible_heat_flux)
• vapor_pressure_bottom

SGP/EBBR/E15 - E15 EBBR Battery Voltage Low

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

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

SGP/EBBR/E15 - E15 EBBR Incorrect Net Radiation

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

• Latent heat flux(latent_heat_flux)
• Net radiation(net_radiation)
• Sensible heat flux(sensible_heat_flux)

SGP EBBR E13 - E13 EBBR Soil T #4 Incorrect

Soil Temperature #4 floated around, causing average soil heat flow
to sometimes be too small (resulting too small a sensible heat flux and
too large a latent heat flux) or too large (resulting in too large a 
sensible heat flux and too small a latent heat flux).  Investigation of
g4 will indicate when these conditions occurred and the likely effect on
sensible and latent heat fluxes.

• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_4
• energy_storage_change_4
• Soil temperature mean 4(soil_temp_4)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Latent heat flux(latent_heat_flux)

SGP EBBR E12 - E12 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

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

SGP EBBR E13 - E13 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

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

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

The data was incorrect during the 6 month checks.

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

SGP EBBR E12 - E12 EBBR Data Incorrect From AEM In One Position

The AEM kept stopping in one position. Offset biases are not removed from the 
gradient data in this situation and the data indicated is therefore incorrect.

• bowen_ratio
• temp_air_top
• rh_bottom_fraction
• Latent heat flux(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom
• temp_trh_top
• Sensible heat flux(sensible_heat_flux)

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

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

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

SGP EBBR E15 - E15 EBBR Data Zeros Incorrect

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

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

SGP EBBR E15 - E15 EBBR Recalibration Changeout

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

Unit #14 was removed; #6 was installed.

• East longitude(lon)
• vapor_pressure_top
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• rh_bottom_fraction
• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_5
• temp_trh_top
• surface_soil_heat_flux_3
• Atmospheric pressure(atmos_pressure)
• surface_soil_heat_flux_4
• home_signal_15
• temp_air_top
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_5
• corr_soil_heat_flow_4
• temp_air_bottom
• corr_soil_heat_flow_3
• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• bowen_ratio
• Net radiation(net_radiation)
• soil_heat_flow_1
• soil_moisture_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_flow_3
• soil_heat_capacity_3
• soil_heat_flow_2
• soil_heat_flow_5
• soil_moisture_2
• soil_moisture_1
• soil_heat_flow_4
• soil_moisture_4
• soil_moisture_3
• Soil temperature mean 5(soil_temp_5)
• Soil temperature mean 2(soil_temp_2)
• Soil temperature mean 1(soil_temp_1)
• Soil temperature mean 4(soil_temp_4)
• Soil temperature mean 3(soil_temp_3)
• North latitude(lat)
• Latent heat flux(latent_heat_flux)
• soil_heat_capacity_4
• home_signal_30
• soil_heat_capacity_5
• temp_trh_bottom
• time_offset
• base_time
• Altitude above mean sea level(alt)
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• Wind direction vector mean(wdir_vec_mean)
• Wind speed vector mean(wspd_vec_mean)
• vapor_pressure_bottom
• temp_reference
• rh_top_fraction
• energy_storage_change_1
• wdir_vec_std
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4

SGP/EBBR/E13 - Reprocess: E13 EBBR Soil heat Flows #1 and #2 Incorrect

Soil Heat Flow probes #1 and #2 were incorrect during the
indicated period (and for some time afterward, to be covered in another
DQR).  Outputs from the probes were typically too large negative or 
too large positive.

• soil_heat_flow_2
• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_1
• surface_soil_heat_flux_2
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• corr_soil_heat_flow_2
• Latent heat flux(latent_heat_flux)
• soil_heat_flow_1
• corr_soil_heat_flow_1

SGP EBBR E13 - E13 EBBR Data Incorrect

The 5 and 15 minute data was zero and thus the thirty minute data was
also incorrect.  This occurs after the restart of an EBBR system, in
this case after a recalibration unit changeout.

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

SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect

The left T/RH Probe Temperature was often incorrect, causing the other indicated
measurements to be incorrect also.

• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR Left T/RH Probe Temperature Incorrect

The left T/RH Probe Temperature was often incorrect, causing the other indicated
measurements to be incorrect also.  

When the home30 signal had an offset, the top RH probe temperature was incorrect
but not the bottom RH probe temperature.

• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR AEM in Mid Position

The AEM stopped before reaching the end of it's travel,
causing the home signals to be between 0 and 3 during 
much of this period (therefore the data is colored yellow).  

All gradient data, sensible heat flux, latent heat flux,
and the Bowen ratio are incorrect during this condition.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR AEM Home 30 Offset

The AEM home30 signal is offset by approximately 25;
it appears that the electronics of the AEM is adding
the home15 and home30 voltages together when the AEM is
in the home30 position.

All gradient data, sensible heat flux, latent heat flux,
and the Bowen ratio are incorrect during this condition.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR AEM Home 30 Offset or AEM in Mid Position

The AEM stopped before reaching the end of it's travel,
causing the home signals to be between 0 and 3 during 
part of this period.

The AEM home30 signal is offset by approximately 25 
during part of this period; it appears that the electronics 
of the AEM is adding the home15 and home30 voltages 
together when the AEM is in the home30 position.

All gradient data, sensible heat flux, latent heat flux,
and the Bowen ratio are incorrect during these conditions.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect

This condition occurred most of the time during the 
indicated period (hence color yellow).

The left air temperature was incorrect only when the AEM
was in the home 30 position.  This only affected the bottom
air temperature calculation.  However, it made the latent
heat flux, sensible heat flux, and Bowen ratio incorrect.

The sensor was improperly inserted into the aspirator shield
and was pinched between the shield and the T/RH probe. When
the AEM was in the home30 position, the aspirator hose
position may have caused the sensor to short to ground.

• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• Latent heat flux(latent_heat_flux)

SGP EBBR E13 - E13 EBBR Left Air Temperature Incorrect

This condition occurred most of the time during the 
indicated period (hence color yellow).

The left air temperature was incorrect only when the AEM
was in the home 30 position.  This only affected the bottom
air temperature calculation.  However, it made the latent
heat flux, sensible heat flux, and Bowen ratio incorrect.

The sensor was improperly inserted into the aspirator shield
and was pinched between the shield and the T/RH probe. When
the AEM was in the home30 position, the aspirator hose
position may have caused the sensor to short to ground.

• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect

Soil Temperature #4 was often incorrect, typically too large negative,
during this period, causing other measurements calculated with
it to be incorrect also. This was caused by a bad multiplexor channel,
which was discovered by the vendor during recalibration of the unit
later.

• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_4
• energy_storage_change_4
• Soil temperature mean 4(soil_temp_4)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Reprocess: E13 EBBR Soil Temperature #4 Incorrect

Soil Temperature #4 was often incorrect, typically too large negative,
during this period, causing other measurements calculated with
it to be incorrect also. This was caused by a bad multiplexor channel,
which was discovered by the vendor during recalibration of the unit
later.

• Sensible heat flux(sensible_heat_flux)
• surface_soil_heat_flux_4
• energy_storage_change_4
• Soil temperature mean 4(soil_temp_4)
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Left T/RH Probe Temperature Incorrect

During much of the indicated period the Left T/RH Temperature was
incorrect.  Because the home signal was between 0 and 3, the 
temperature was incorrect when the AEM was at the bottom position,
but was correct when the AEM was at the top position.  This was caused by
a short created when the sensor was mispositioned in the aspirator
housing and enough strain on the cable for it to bring it into contact
with the housing in the bottom position.

• vapor_pressure_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_bottom
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Left Humidity Probe Temperature Incorrect

The left humidity probe temperature was incorrect
much of the time, as was the top humidity temperature and
vapor pressure.

• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• vapor_pressure_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E13 - Data incorrect during maintenance

The 5, 15, and 30 minute measurements were zero or
offscale at 2200 GMT only.  Electronic connections
were being checked at that time.

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

SGP/EBBR/E13 - Data Incorrect During 6 Month Checks

The measurements were incorrect during the 6 month checks.

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

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

The data was incorrect during the 6 month checks.

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

SGP/EBBR/E12 - 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.

• bowen_ratio
• temp_air_top
• rh_bottom_fraction
• Latent heat flux(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom
• Sensible heat flux(sensible_heat_flux)
• temp_trh_top

SGP/EBBR/E12 - 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:  1515, 1520, 1525, 1530, 1535, 1540, 1545, 1550, 1555,
           1600, 1605, 1610
15 minute: 1515, 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.

• bowen_ratio
• temp_air_top
• rh_bottom_fraction
• Latent heat flux(latent_heat_flux)
• vapor_pressure_top
• vapor_pressure_bottom
• temp_air_bottom
• rh_top_fraction
• temp_trh_bottom
• temp_trh_top
• Sensible heat flux(sensible_heat_flux)

SGP/EBBR/E13 - 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:  2005, 2010, 2015, 2020, 2025, 2030, 2035, 2040, 2045,
           2050, 2055, 2100, 2105
15 minute: 2015, 2045, 2100, 2115
30 minute: 2030, 2100

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

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

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

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

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

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)

SGP/EBBR/E15 - T/RH Check

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

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

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


Data Fields

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

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

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

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

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

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

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

• vapor_pressure_top
• temp_trh_top
• rh_top_fraction
• temp_air_bottom
• rh_bottom_fraction
• Latent heat flux(latent_heat_flux)
• bowen_ratio
• temp_trh_bottom
• temp_air_top
• Sensible heat flux(sensible_heat_flux)
• vapor_pressure_bottom

SGP/EBBR/E13 - 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.

Time of the check is not known, so the entire day has been flagged as
suspect.

• vapor_pressure_bottom
• temp_air_bottom
• Sensible heat flux(sensible_heat_flux)
• bowen_ratio
• temp_trh_top
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction
• vapor_pressure_top
• temp_air_top
• Latent heat flux(latent_heat_flux)