SGP/EBBR - EBBR E9 Anemometer Frozen, Wind Speed Incorrect

The anemometer cups were frozen stalled.

The following values were therefore incorrect:

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

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

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

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

SGP/EBBR - EBBR E9 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

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - E9 EBBR Wind Direction Incorrect

The wind direction vane was frozen in one direction by icing during the indicated period.

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

SGP/EBBR/E9 - E9 EBBR Wind Speed Incorrect

The wind speed sensor cups were frozen in place by icing.

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

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

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

SGP/EBBR/E9 - E9 EBBR Soil Heat Flow 1 Incorrect

Soil Heat flow sensor #1 produced measurements that were large negative during the 
indicated period.  This was the result of sensor failure.

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

• soil_heat_flow_1_mv

SGP/EBBR/E9 - E9 EBBR Soil Heat Capacities Incorrect

Soil Heat Capacities were out-of-range during this period, as reported by
the datalogger. The cause of this is unknown.

Actual values used in the computations of fluxes were okay, as the fluxes were not 
affected.

• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5

SGP EBBR E9 - E9 EBBR Data Incorect During 6 Month Checks

The data was incorrect during the 6 month checks.

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

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

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

SGP EBBR E9 - E9 EBBR AEM Hung, Data Incorrect

A worn AEM belt caused the AEM to hang frequently.
Gradient measurements, sensible heat flux, latent heat flux,
and Bowen ratio are incorrect during the indicated periods.

The AEM hung on 2/9/01 because of icing from an ice storm.

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

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

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

SGP EBBR E9 - E9 EBBR AEM Hung, Data Incorrect

The AEM belt was worn and the AEM hung frequently.
Gradients, sensible heat flux, latent heat flux,
and Bowen ratio were incorrect during the indicated period.

The AEM was replaced during the recalibration changeout
on 5/11/01.

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

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

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

SGP EBBR E9 - E9 EBBR Wind Speed Frozen Stopped

An ice storm froze the wind speed sensor to a stop.

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

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

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

SGP EBBR E9 - E9 EBBR Wind Direction Frozen In One Direction

An ice storm froze the wind direction sensor in one postion.
Th indicated 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 speed vector mean(wspd_vec_mean)
• Wind direction, vector, lower, 1-min avg(wdir_vec_mean)
• wdir_vec_std

SGP/EBBR/E9 - Reprocess: E9 EBBR Soil Temperature #5 Intermittently Incorrect

Soil moisture probe #5 in the recalibrated unit installed
on 5/11/01 has not been working all of the time.  At times
the measurement has been very large and incorrect.  The
indicated measurements are incorrect at those times.  The
data must be inspected to determine the times that 
have incorrect data.  The sensible and latent heat fluxes can
be recalculated by using soil sets 1, 2, 3, and 4 only in a 
recalculation of the energy budget.

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

• soil_temp_5_rr

SGP EBBR E9 - E9 EBBR Gradients Incorrect During Sensor Replacement

During the replacement of the right air temperature
probe, all gradient measurements were incorrect.

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

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

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

SGP EBBR E9 - E9 EBBR Right Air Temperature Incorrect

The right air temperature probe measurements were
incorrect during these periods.

• bowen_ratio
• 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)

• temp_air_right

• temp_air_top
• temp_air_bottom

SGP/EBBR/E9 - 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:  1820, 1825, 1830, 1835, 1840, 1845, 1850, 1855, 1900,
           1905, 1910, 1915, 1920, 1925, 1930, 1935, 1940, 1945
15 minute: 1830, 1845, 1900, 1915, 1930, 1945
30 minute: 1830, 1900, 1930, 2000


(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.

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

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

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

SGP/EBBR/E9 - Annual calibration changeout

On November 15, 1995 the changeout for annual calibration occurred at E9,
Ashton, KS.  The soil moisture sensors were shipped wet from the vendor 
and did not stabilize until 25 November 1995.  The following data should 
be considered incorrect until 25 November 1995:

15 minute:  rr_sm1, rr_sm2, rr_sm3, rr_sm4, rr_sm5

30 minute:  h, e, ave_shf, shf1, shf2, shf3, shf4, shf5, sm1, sm2, sm3,
            sm4, sm5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4,
            g1, g2, g3, g4, g5.

• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• surface_soil_heat_flux_4
• surface_soil_heat_flux_5
• surface_soil_heat_flux_2
• surface_soil_heat_flux_3
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• surface_soil_heat_flux_1
• energy_storage_change_5
• soil_heat_capacity_1
• soil_heat_capacity_2
• soil_heat_capacity_3
• soil_heat_capacity_4
• soil_heat_capacity_5
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• soil_heat_flow_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_heat_flow_2
• soil_heat_flow_1
• soil_heat_flow_4
• soil_heat_flow_3
• soil_moisture_1
• soil_moisture_3
• soil_moisture_2
• soil_moisture_5
• soil_moisture_4

• soil_moisture_5_rr
• soil_moisture_2_rr
• soil_moisture_4_rr
• soil_moisture_1_rr
• soil_moisture_3_rr

SGP/EBBR/E9 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E9 - Annual calibration changeout

On November 15, 1995 the changeout for annual calibration occurred at E9,
Ashton, KS.  After installation of the new SEBS unit, RH output was zero.  
The next day site operations personnel found that the RH probe cable 
connections were loose.  RH returned to normal after the connections were 
tightened at 1700 GMT on 16 November 1995.  During the period of time that 
the connections were not made, the following data values are incorrect: 

5 minute:  hum_top, hum_bot, vp_top, vp_bot

15 minute: mv_hum_r, mv_hum_l

30 minute: hum_top, hum_bot, vp_top, vp_bot.

• vapor_pressure_top
• rh_bottom_fraction
• vapor_pressure_bottom
• rh_top_fraction

• rh_left_mv
• rh_right_mv

• vapor_pressure_bottom
• rh_top_fraction
• vapor_pressure_top
• rh_bottom_fraction

SGP/EBBR/E9 - Reprocess: Soil Temperature #5 Incorrect

Soil temperature # 5 was incorrect most of the time, leading to incorrect surface heat 
flow, latent heat flux and sensible heat flux.  The heat fluxes can be recalculated by using 
soil sets 1-4 as follows:

ave_shf = (g1 + g2 + g3 + g4)/4
e = -(q + ave_shf)/(1 + bowen)
h = -(q + e + ave_shf)

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

SGP/EBBR/E9 - Measurements All Zeros

The measurements were all zeros at the indicated times.  This occurs after a CR10 program 
restart, which sometimes happens after some servicing of the EBBR is performed.

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E9 - Humidity Probe Measurements Incorrect

The temperature and humidity measurements from both T/RH probes were incorrect during 
changeout of the right probe.

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

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

SGP/EBBR/E9 - Right Humidity Suspect

The Right Humidity measurement was normally incorrect, although it is often difficult to 
determine it by looking at the measurement.  The measurements float around, sometimes 
being too large and sometimes being too small, through most of the day, particularly for the 
hour before sunset through the hour after sunrise.  Great care and comparison with 
surrounding EBBR sites would be needed to be able to use any of the latent and sensible heat 
flux measurements from E9 for this period. 

Another DQPR has been issued to fix this problem, which has eluded repair efforts so far.

• vapor_pressure_top
• rh_bottom_fraction
• vapor_pressure_bottom
• 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)
• rh_top_fraction

• vapor_pressure_bottom
• rh_top_fraction
• vapor_pressure_top
• rh_bottom_fraction

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/E9 - Data Incorrect during 6 month checks

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

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E9 - REPROCESS: Soil Temperature #5 Incorrect

Soil Temperature #5 was intermittently incorrect.
The cause is unknown. The indicated measurements 
that are calculated using soil temperature are 
also incorrect.

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

SGP/EBBR/E9 - REPROCESS: Soil Heat Flow #4 Incorrect

Soil Heat Flow #4 was incorrect during these periods as a 
consequence of the repair of Soil Temperature #5.  
See below for a work-around.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• soil_heat_flow_4
• surface_soil_heat_flux_4
• 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_4

SGP/EBBR/E9 - Net Rad data bad during dome replacement

The net radiation measurement was incorrect during replacement
of the top dome. Measurements calculated using net radiation are also incorrect.

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - AEM Malfunction

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

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

• temp_air_right
• temp_air_left

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

SGP/EBBR/E9  - AEM Hung Inbetween Home Positions

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

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

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

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

SGP/EBBR/E9  - 6 Month Checks

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

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

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

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

SGP/EBBR/E9  - Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect.

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

• soil_heat_flow_1_mv

SGP/EBBR/E9 -   Battery Voltage Low

Many of the measurements are incorrect much of the time during this period,
when the battery voltage was 10.9 volts or less.

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

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

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

SGP/EBBR/E9 - AEM Hung in home 30 position.

The AEM was hung in the home 30 position.

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

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

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

SGP/EBBR/E9  - Water in Net Radiometer; Surface Fluxes are Incorrect

The net radiometer top dome was punctured by migrating birds.  This alone does not cause 
incorrect net radiation measurements.  However, when it subsequently rains, water collects 
in the bottom dome, causing the net radiation measurements to be too large during the 
day and too small at night.

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9  - Measurements All Zero

Data values were all zero after restarting the CR10 datalogger.

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

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

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

SGP/EBBR/E9 - 6 Month Checks

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

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

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

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

SGP/EBBR/E9  - Net Radiometer Iced Over During Storm

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

• Radiation, net(net_radiation)
• Heat flux, 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Wind Speed Sensor Frozen By Ice Storm

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

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

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

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

SGP/EBBR/E9  - Wind Speed Frozen Stopped By Ice

An ice storm froze the wind speed sensor to a stopped condition. The bearings
in the sensor appear to be worn, contributing to the problem.

The wind speed and residual wind speed measurements are incorrect.

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

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

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

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

SGP/EBBR/E9  - 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)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

SGP/EBBR/E9 - net radiometer top dome broken, water in bottom dome

The Net radiometer top dome was broken.  Site Ops did not indicate that there
was water in the bottom dome, but the data suggests it.  Net radiation values during the 
period are incorrect.

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

• Radiation, net(net_radiation)

SGP/EBBR/E9 - 6 Month Checks

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

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

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

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

SGP/EBBR/E9 - Wind Speed Threshhold Low

When the wind speed is very low, the anemometer cups stop turning.  Wind
speeds above the threshhold may be underestimated.

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

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

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

SGP/EBBR/E9  - Wind Speed Frozen Stopped By Ice Storm

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

The wind speed and residual wind speed measurements are incorrect.

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

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

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

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

SGP/EBBR/E9  - 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)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std

SGP/EBBR/E9  - 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

• wdir_vec_mean_mv

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

SGP/EBBR/E9  - Wind Speed Frozen Stopped By Ice

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

The wind speed and residual wind speed measurements are incorrect.

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

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

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

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

SGP/EBBR/E9 - Soil moisture too high

The 15 and 30 minute data for sm3 indicated that there was a problem with the sensor that 
kept the soil moisture artificially high.  This corrected itself on 6/11, but it is not 
clear why. 

A new sensor was installed on 6/17 and it has behaved well since then.

• soil_moisture_3

• soil_moisture_3_rr

SGP/EBBR/E9 - Improved EBBR CR10 Program

Effective 20050322.1600, the EBBR.E9 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 20050322, 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 sgp30ebbrE9.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE9.a1).

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• 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/E9 - Net Radiation Incorrect: Sensible and Latent Heat Fluxes Incorrect

Water had entered the top of the net radiometer during the rain on 10/31 early morning.  
The net radiation, and thus sensible and latent heat fluxes were incorreect during the 
stated period.

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Average Soil Heat Flux Incorrect

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

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• Heat flux, 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/E9 - metadata corrections

On 20050420, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E9 data collected by ARM back to the installation of the 
instrument in December 1992. Please see the current metadata for correct information.  These 
changes do not affect data values or quality.	

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

• base_time

• base_time

• base_time

SGP/EBBR/E9 - Net Radiation, Sensible and Latent Heat Fluxes Incorrect

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

• Radiation, net(net_radiation)
• Heat flux, 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Wind Speed Incorrect

The wind speed measurement was incorrect after the cup anemometer lost a cup.

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

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

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

SGP/EBBR/E9 - 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):

0-360

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.

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

SGP/EBBR/E9 - Net Radiation Incorrect

There was water in the net radiometer.  

The net radiation data was incorrect.

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

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

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

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

SGP/EBBR/E9 - Sensible and latent heat flux incorrect

Sensible and latent heat fluxes were sometimes incorrect when soil temperature 4 and soil 
moisture 4 were acting up.

Sometimes the sensible and latent heat fluxes are indicated as incorrect by an offscale 
reading produced by the data logger error checking routine.  This occurs mostly during 
daytime.  However, you will have to examine the soil moisture 4 and soil temperature 4 data 
to see when they were incorrect or offscale to determine all times for which sensible and 
latent heat fluxes were incorrect.

• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_4
• Heat flux, sensible, at 1.5-m height, 30-min intervals(sensible_heat_flux)
• Soil temperature mean 4(soil_temp_4)
• Heat flux, latent, at 1.5-m height, 30-min intervals(latent_heat_flux)
• soil_moisture_4

• soil_temp_4_rr
• soil_moisture_4_r
• soil_moisture_4_rr

SGP/EBBR/E9 - T/RH Probe Temperature Problem - Sensible and Latent Heat Fluxes Affected

During mid-day the left T/RH probe temperature was offscale, sometimes resulting in 
incorrect sensible and latent heat fluxes.

• vapor_pressure_top
• temp_trh_bottom
• vapor_pressure_bottom
• temp_trh_top
• 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)

• temp_trh_left_rr

• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• temp_trh_bottom

SGP/EBBR/E9 - Sensible and Latent Heat Fluxes Incorrect

The right Air Temperature probe leads were loose.
During nighttime the right Air Temperature went offscale,
resulting in incorrect sensible and latent heat fluxes.

• temp_air_bottom
• bowen_ratio
• 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)

• temp_air_right

• temp_air_top
• temp_air_bottom

SGP/EBBR/E9 - Sensible and Latent Heat Fluxes Incorrect

The AEM stuck in the home 15 or home 30 position, resulting in incorrect sensible and 
latent heat fluxes.

• 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/E9 - pressure calibration

In the original Campbell CR10 software provided by the vendor (version 1),
the EBBR had incorrect calibration pressure sensor slopes and offsets.
The slopes and offset was carried through into version 2 of the
software and was not discovered by the mentor (me) until sometime later.
The calibration and slope did not deleteriously affect calculations in
the program since only a four percent reduction in atmospheric pressure
measurement resulted (the calculations are not very sensitive to small
errors in pressure). The vendor does not recall how the wrong
calibrations came to be used.   

Version 4 of the CR10 program includes the proper calibration and offset. 
This remedies the apparent offset problem (it was actually a calibration 
and offset problem). In comparisons with the co-located SMOS pressure
sensor, the difference between the SMOS and EBBR pressure values appeared
almost constant with time, hence the assumption of an offset problem.
However, the EBBR pressure sensor offsets are so large (a consequence of
tailoring the calibration curve to a small range of elevations in which the
calibration applies) that the very small error in slope was difficult to
recognize.

The outputted pressure values for the EBBR system can be corrected
with the following information and equations.  

         Old Slope     Old Offset        New Slope     New Offset

          0.01952        81.24            0.02031        81.27

   Correct Pressure =
               ((Current Pressure Data - 81.24)*0.02031/0.01952) + 81.27
                    =  1.04047*(Current Pressure Data) - 3.258

• Barometric Pressure(atmos_pressure)

SGP/EBBR/E9 - Invalid wind speed frozen sensor

On February 23, 1994 the EBBR wind speed sensor at E9, Ashton, KS was
frozen to a stationary condition by ice.  It broke free in strong winds on
February 24, 1994.  Invalid data for the time period indicated is:

30 minute: wind_s, res_ws

15 minute: wind_s

5 minute: wind_s, res_ws.

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

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

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

SGP/E9/EBBR - AEM Malfunction

EDITOR'S NOTE:  This DQR refers, in part, to data collected prior to the
begin date of regular ARM data.  During the first month covered by this
DQR, the EBBR.E9 data were not archived with standard ARM names.  The data
are therefore not readily available, but can be made available by special
request.  The total period covered by the problem documented here is
930615.0000-940322.1643.

The AEM at E9 frequently did not function properly during the time period
stated.  Please see the notes in the EBBR platform describing home signal
conditions for which certain of the data fields are suspect.  The newly
installed AEM is performing properly so far.

The files could be flagged, but it is up to the user to read the
platform notes concerning the condition of the home signal and then
view the quality of the data accordingly.  I would be at my terminal full-
time in attempting to list all days and times and data fields that are
affected by the numerous AEM malfunctions.  Furthermore, I have done so
previously in several PIFs that I will reference here for information:
P931101.4, P931115.2, P940105.2, P940211.3

• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• home_signal_30
• 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)
• rh_bottom_fraction
• vapor_pressure_bottom
• temp_air_bottom
• temp_air_top
• home_signal_15
• rh_top_fraction

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

SGP/EBBR/E9 - AEM failure

The Automatic Exchange Mechanism would not function.  It was decided to
take the unit back to SGP CART to try to repair it.  A spare AEM was not
available for a replacement, so the aspirated radiation shields housing
temperature and humidity gradient sensors were attached to the EBBR
framework, one meter apart vertically, with the right side in the lower
position.  The housings remained this way for two weeks.  During this time
period, home signal, sensible heat flux, and latent heat flux values are
incorrect.  Significant reprocessing would be required to obtain correct
fluxes, and that would be possible only if one assumed that offsets in the
sensor calibrations are negligible; that is a very debatable assumption
considering that the EBBR system is already half a year past due for
calibration.

• home_signal_30
• 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)
• home_signal_15

SGP/EBBR/E9 - Reprocess: Soil Heat Flow Sensor Failure

Failure of soil heat flow sensor #5 at E9, Ashton, KS resulted in incorrect
data values for 6 fields for much of the period of time listed above.  The
soil heat flow values from #5 were so large (in the absolute) that it
deleteriosly affected the soil heat flux average and the sensible and
latent heat fluxes.  The fields affected were:

30 minute: shf5, c_shf5, g5, ave_shf, e, h

15 minute: mv_hft5.

I list only the 30 minute times affected below; it can be assumed that the
15 minute value contained in the half hour are incorrect.  Sensor #5 was
replaced at 1545 GMT on June 28.  Old S/N 923029, new S/N 923092.  Half hour
1600 GMT is missing due to having to reload the CR10 program with a new shf5
calibration.  Sensible and latent heat fluxes can be recomputed by averaging
soil heat flow sensors 1-4; use the following equations:

ave_shf = (g1 + g2 + g3 + g4)/4

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

h = e * bowen,

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

Affected half hours:

Date          Times (GMT)

6/15    2130, 2300, 2330
6/16    0000, 0030, 2130-2330
6/17    0000-1530, 1900, 1930
6/18    0200-2330
6/19    All
6/20    All
6/21    All
6/22    All
6/23    All
6/24    All
6/25    0000-1930, 2300, 2330
6/26    All
6/27    All
6/28    0000-1600

• soil_heat_flow_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_5
• 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

• soil_heat_flow_5_mv

SGP/EBBR/E9 - Malfunctioning Wind Dir Sensor, Incorrect SM2 Results

It has been reported previously that a malfunction of the wind direction
sensor resulting in zero or 135 degree outputs can cause the soil moisture
#2 sensor to read offscale.  The two sensors are attached to a multiplexer
pair.  The manufacturer of the multiplexer and data acquisition system have
not been able to explain how our instrument configuration can cause this
effect.  Shortly after 0030 GMT on August 20, 1994 significant rainfall
occurred, being reflected in more than a doubling of soil moisture within
an hour.  During the time period listed above, the wind direction sensor
mulfunctioned (apparently caused by water in the wind direction sensor
electronics), causing the following data fields to be incorrect:

5 minute:  res_ws, wind_d, sigma_wd

15 minute: mv_wind_dir

30 minute: res_ws, wind_d, sigma_wd.

During part of the listed period, Soil Moisture #2 was also incorrect,
being offscale; during those times the following 30 minute data is also
incorrect:

30 minute: sm2, c_shf2, ave_shf, cs2, ces2, g2, h, e.

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

SGP/EBBR/E9 - Reprocess: Soil Heat Flux Out of Range

For an unknown reason, soil heat flux sensor #5 indicated too small a value
for the period listed above.  This resulted in an incorrect average of soil
heat flow for the five sets of soil heat flow plates, and therefore
incorrect e (latent heat flux) and h (sensible heat flux) in the 30 minute
data.  The following data values are incorrect:

15 minute: mv_hft5

30 minute: shf5, c_shf5, ave_shf, g5, e, h

The latent and sensible heat flux can be recalculated by using only soil
heat flows 1 through 4 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g4)/4

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

h = -(e + ave_shf + q).

• soil_heat_flow_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_5
• 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

• soil_heat_flow_5_mv

SGP/EBBR/E9 - Hail Damage to Net Radiometer and Wind Speed Sensor

Golf ball size hail was reported for the Ashton site for early August 20,
1994.  It damaged the wind speed sensor and the net radiometer shortly
before 0130 GMT.  The following data fields are to be flagged as incorrect
for the periods listed above (resultant wind speed has already been
indicated as incorrect in a previous DQR that documented the malfunction of
the wind direction sensor):

5 minute:  wind_s, res_ws, q

15 minute: wind_s, mv_q

30 minute: wind_s, res_ws, q, h, e.

Note that h and e are also incorrect as a consequence of q being incorrect.

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

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

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

SGP/EBBR/E9 - Reprocess: Soil Heat Flow Sensor 5 Incorrect Data

Soil heat flow sensor #5 periodically outputted incorrect values from
mid-August 1994 until mid-January 1995.  The output often indicated large
negative heat flow.  The sensor was replaced on January 23, 1995, even
though the previous week of data was correct.  The data affected (and thus
incorrect) includes:

15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h.

The dates and times (GMT) of incorrect values are listed below.  Only half
hour times are listed.

08/19/94  1700-2300
10/13/94  1800-2330
10/14/94  0000-1500
10/17/94  2030-2100
10/28/94  2030-2230
12/20/94  0630-2330
12/21/94  0000-2330
12/22/94  0000-2330
12/23/94  0000-0530
12/26/94  1700-2330
12/27/94  0000-0130, 1630
01/02/95  0600-2330
01/03/95  0000-2330
01/04/95  0000-2330
01/05/95  0000-1700, 2200-2330
01/06/95  0000-2330
01/07/95  0000-2330
01/08/95  0000-2330
01/09/95  0000-0230, 0900-2330
01/10/95  0000-2330
01/11/95  0000-2330
01/12/95  0000-2330
01/13/95  0000-2330
01/14/95  0000-0400, 0800-2330
01/15/95  0000-0300, 1200-2330
01/16/95  0000-1600

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1 through 4 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g4)/4

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

h = -(e + ave_shf + q)

• soil_heat_flow_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_5
• 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

• soil_heat_flow_5_mv

SGP/EBBR/E9 - Radiation Shield Problem

The left radiation shield was off during the period of time above.  Close
inspection of the 15 minute data was required to detect when the shield
fell off.  As is often the case in such a situation, the 30 minute data
does not adequately indicate such a failure.  A radiation shield has fallen off
of an EBBR before, apparently a result of vibration of the AEM during
exchanges.  All air and humidity probe temperatures (except the reference
temperature), relative humidities, vapor pressures, Bowen ratio, sensible heat
flux, and latent heat flux during this period are considered to be incorrect.

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

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

SGP/EBBR/E9 - Stopped Ventilation Fan

On April 18, 1995, a site operator discovered the right aspirator ventilation
fan of the EBBR to be stopped.  Inspection of the data indicates that this
condition began early in the GMT day.  Interpretation of the start time of
the condition is made more difficult by a slight bias low in absolute
temperature in comparison to the left temperature probe.  Lack of ventilation
of the temperature and relative humidity sensors attached to the AEM results
in incorrect measurements of air temperature and relative humidity by the
right aspirator probes, and therefore all quantities calculated from them,
including sensible and latent heat fluxes, are incorrect as well.
The quantities that are incorrect for the period above are:

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

15 minute: rr_thum_r, mv_hum_r, tair_r

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

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

• temp_trh_right_rr
• temp_air_right
• rh_right_mv

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

SGP/EBBR/E9 - Water in Net Radiometer

The top dome of the net radiometer was broken and a small amount of water
had collected in the bottom dome of the net radiometer.  It is not obvious
that it had been there for more than several hours before the site operators
arrived for a preventative maintenance visit.  There are noticable effects on
the data for the period listed above.  The domes were replaced.  The following
data is incorrect for the period above:

5 minute:  q

15 minute: mv_q

30 minute: q, e, h

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Frozen Wind Speed Sensor

On March 7, 1995 freezing rain stopped the cups of the EBBR wind
speed instrument at Ashton, KS (E9).  All 5, 15, and 30
minute data values indicated below are incorrect for the period listed above.

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

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

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

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

SBP/EBBR/E9 - Reprocess: Soil Heat Flow Sensor 5 Incorrect Data

Soil heat flow sensor #5 periodically outputted incorrect values during the
period above.  The output often indicated large negative heat flow.  The
sensor connections were tightened on March 20, 1995, which seems to have
corrected the problem.  The data affected (and thus incorrect) includes:

15 minute: mv_hft5
30 minute: shf5, c_shf5, g5, ave_shf, e, h.

The dates and times (GMT) of incorrect values are listed below.  Only half
hour times are listed.

03/10/95  2130
03/11/95  0100-0600, 1530-2330
03/12/95  0000-1930
03/13/95  0500
03/16/95  1830-2330
03/17/95  0000-2330
03/18/95  0000-1100
03/19/95  2100-2330
03/20/95  0000-0400, 1530-1700

The latent and sensible heat fluxes can be recalculated by using only soil
heat flows 1 through 4 to calculate the average soil heat flow,

ave_shf = (g1 + g2 + g3 + g4)/4

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

h = -(e + ave_shf + q)

• soil_heat_flow_5
• Average soil heat flow at the surface(surface_soil_heat_flux_avg)
• surface_soil_heat_flux_5
• 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

• soil_heat_flow_5_mv

SGP/EBBR/E9 - 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.

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

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

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

SGP/EBBR/E9 - AEM Exchange Stopped in Snow and Freezing Rain

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

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

• bowen_ratio
• 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/E9 - Annual calibration changeout

On November 15, 1995 the changeout for annual calibration occurred at E9,
Ashton, KS.  SEBS unit 4 was removed and unit 6 was installed.  Between
1230 and 2100 GMT no data was collected; data during this period is missing.

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

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

SGP/EBBR/E9 - Wind Speed Cups Frozen

Freezing rain, snow, and below freezing conditions during 23 January 
1996 caused the wind speed sensor cups to freeze in a stopped state at E9, 
Ashton, KS.  Site operations personnel removed the ice from the cups later 
in the day to allow them to turn freely again. 

Measurements affected by the stalled wind speed sensor include:

5 minute:  wind_s, res_ws

15 minute: wind_s

30 minute: wind_s, res_ws

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

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

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

SGP/EBBR/E9 - 3-month check

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

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

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

SGP/EBBR/E9 - Air Temperature Thermocouples Incorrect

Both air temperature thermocouples were offscale, for unknown reasons, for 
1500 GMT for both 15 and 30 minute air temperature values.

The malfunction of the air temperature thermocouples results in incorrect Bowen 
ratio, sensible heat flux, and latent heat flux during the period above. 

The data values that are affected are:

5 minute:  tair_top, tair_bot

15 minute: tair_r, tair_l

30 minute: tair_top, tair_bot, bowen, e, and h

• temp_air_bottom
• bowen_ratio
• 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)

• temp_air_right
• temp_air_left

• temp_air_top
• temp_air_bottom

SGP/EBBR/E9 - EBBR 3 Month Checks - 10 EFs

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled 
(reflected by home signals near zero) so that the two aspirator units
can be placed at the same height.  The measurements during these periods 
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), 
or latent heat flux (e), nor do the air temperature and relative humidity 
measurements indicate correct gradients.  Checks performed before or after the 
AEM is disabled also lead to some incorrect data.  Incorrect 5, 15 minute and 
half hour data occurs for periods indicated.

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

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

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

SGP/EBBR/E9 - Temperature Portion of T/RH Probe

The Temperature portion of the right T/RH probe indicated too high a 
temperature for nearly 11 months.  I twice placed work requests to have the 
probe replaced, but no spares were available.  Spares recently became 
available and I placed a new work request to have the probe changed.  The 
replacement occurred on 18 June 1997; this fixed the problem.  The main 
results of the high temperatures were probe top and bottom temperatures
(used only for the calculation of vapor pressure) and vapor pressures that 
were too large.  Furthermore, this caused latent heat flux to be reported 
to be too large, and therefore sensible heat flux was reported to be too 
small.  Recalculation of the fluxes using thermocouple temperatures to 
calculate vapor pressure would be quite time consuming and would have to
assume that the thermocouple temperature and probe temperature were nearly 
the same.

The EBBR procedures have been changed to include comparison of the 
thermocouple and probe temperatures to make it easier for the site 
operators to detect this condition.

The data affected (and thus incorrect) includes:

15 minute: rr_thum_r 
30 minute: thum_top, thum_bot, vp_top, vp_bot, e, h, bowen.

• vapor_pressure_top
• temp_trh_bottom
• temp_trh_top
• 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)
• vapor_pressure_bottom
• bowen_ratio

• base_time
• temp_trh_right_rr
• soil_heat_flow_2_mv
• lat
• battery_voltage
• soil_heat_flow_4_mv
• lon
• soil_heat_flow_5_mv
• soil_heat_flow_3_mv
• alt
• soil_heat_flow_1_mv

SGP/EBBR/E9 - EBBR Biannual Checks

During EBBR 6 month checks the Automatic Exchange Mechanism is disabled 
(reflected by home signals near zero) so that the two aspirator units
can be placed at the same height.  The measurements during these periods 
do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), 
or latent heat flux (e), nor do the air temperature and relative humidity 
measurements indicate correct gradients.  Checks performed before or after the 
AEM is disabled also lead to some incorrect data.  Incorrect 5, 15 minute and 
half hour data occurs for periods indicated.

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

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

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

SGP/EBBR/E9 - Wind Direction Sensor Malfunction

During numerous intermittent times during the period listed, the wind direction
sensor at E9, Ashton, KS malfunctioned, putting out a value of 135.  The
sensor was replaced on 30 September 1997, at 1550 GMT.  All wind direction data
with values of 135 during the period listed should be considered incorrect.
The affected data are:

 5 minute: res_ws, wind_d, sigma_d

15 minute: mv_wind_d

30 minute: res_ws, wind_d, sigma_d

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

SGP/EBBR/E9 - EBBR Frozen Wind Speed

Wind speed cups were frozen during the indicated time periods. All 5,
15, and 30 minute data values indicated  are incorrect for the periods
listed.

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

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

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

SGP/EBBR/E9 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown)

The EBBR AEM stopped exchanging because of icing at during this time
period.

The calculations of Bowen ratio, latent heat flux, and sensible heat
flux are incorrect for the time period indicated.  The other
measurements listed  are also incorrect for those times:

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

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

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

SGP/EBBR/E9 - EBBR Net Radiometer Domes Pierced, Water Inside - Data Affected

The upper dome of the EBBR net radiometers was punctured.
After the puncture, water collected in the top and/or bottom dome.  The
water was removed and the dome was replaced during PM visits. 

 In some cases, the puncture and water resulted in incorrect data. 
Comparison with net radiation values from surrounding EBBR sites and the
SIRS is neccesary to determine if the EBBR net radiation data 
are correct or incorrect.

It is often difficult to tell from the data when the punctures occurred,
but they would have existed for no more than 2 weeks, since the domes
are checked during each two-weekly PM visit.

Incorrect net radiation data results in the latent heat flux and
sensible heat flux also being incorrect.

• 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)

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Wind Speed Sensor Frozen

The wind speed sensor was frozen stalled during this period. 

Data values that were affected are:

 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)

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E9 - 3-Month Check

During EBBR 3 month checks the Automatic Exchange Mechanism is disabled
(reflected by home signals near zero) so that the two aspirator units can be
placed at the same height.  The measurements during these periods 
do not produce correct outputs of bowen ratio (bowen), sensible heat flux
(h), or latent heat flux (e), nor do the air temperature and relative 
humidity measurements indicate correct gradients.  Checks performed before 
or after the AEM is disabled also lead to some incorrect data.  Incorrect 5,
15 minute and half hour data occurs for the period above.

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

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

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

SGP/EBBR/E9 - Six Month Checks

During EBBR 6 month checks (formally called 3 month checks) the Automatic 
Exchange Mechanism is disabled (reflected by home signals near zero) so that
the two aspirator units can be placed at the same height.  The measurements
during these periods do not produce correct outputs of bowen ratio (bowen), 
sensible heat flux (h), or latent heat flux (e), nor do the air temperature
and relative humidity measurements indicate correct gradients.  Checks 
performed just before or after the AEM is disabled also lead to some 
incorrect data.  Incorrect 5, 15 minute and half hour data occurs for the 
period above.

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

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

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

SGP/EBBR/E9 - Wind Direction Data Incorrect

The wind direction sensor stopped working correctly, resulting in the
following values being affected:

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

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

• Raw data stream - documentation not supported

• wdir_vec_mean_mv

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

SGP/EBBR/E9 - EBBR E9 Net Radiometer Dome Broken, Flux Data Incorrect

Incorrect Net Radiation values resulted in incorrect sensible and 
latent heat fluxes. Affected values are:

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

• 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)

• Raw data stream - documentation not supported

• net_radiation_mv

• Radiation, net(net_radiation)

SGP/EBBR/E9 - Wind Speed Data Incorrect

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

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

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E9 - Wind Speed Data Incorrect

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

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

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

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E9 - Wind Speed Incorrect

The wind speed sensor lost two of the three cups.  Flux data is not 
affected.  The data values affected are:

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)

• Raw data stream - documentation not supported

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

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

SGP/EBBR/E9 - Right Aspirator Not Working

The result of the right aspirator not working was a reduction in measured
temperature gradient and thus a reduction in estimated sensible heat flux
and an increase in latent heat flux.  The fluxes could be in error by as
much as 10%.  Reported right air and humidity probe temperatures, top and 
bottom air and humidity probe temperatures, right relative humidity, and 
top and bottom vapor pressure are affected.

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

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

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