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

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• 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.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wspd_vec_mean
• 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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• surface_soil_heat_flux_avg
• soil_heat_flow_1
• corr_soil_heat_flow_1
• sensible_heat_flux
• 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)
• 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
• temp_air_bottom
• soil_heat_flow_3
• 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
• surface_soil_heat_flux_avg
• bowen_ratio
• wspd_arith_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• soil_temp_4
• soil_temp_5
• energy_storage_change_5
• wspd_vec_mean
• soil_temp_3
• soil_temp_2
• soil_temp_1
• 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
• 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
• 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
• wspd_arith_mean
• rh_top_fraction
• wdir_vec_mean
• Barometric Pressure(atmos_pressure)
• wspd_vec_mean
• temp_trh_top
• temp_air_bottom
• rh_bottom_fraction
• vapor_pressure_top
• temp_trh_bottom
• temp_air_top
• net_radiation
• wdir_vec_std
• vapor_pressure_bottom

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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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 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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wspd_vec_mean
• 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.

• surface_soil_heat_flux_avg
• surface_soil_heat_flux_5
• sensible_heat_flux
• latent_heat_flux
• 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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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.

• temp_air_bottom
• bowen_ratio
• sensible_heat_flux
• latent_heat_flux
• temp_air_top

• 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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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 - 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
• 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
• sensible_heat_flux
• soil_heat_flow_5
• 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
• sensible_heat_flux
• 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
• rh_bottom_fraction
• temp_air_bottom
• temp_trh_bottom

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)

• surface_soil_heat_flux_avg
• surface_soil_heat_flux_5
• sensible_heat_flux
• latent_heat_flux
• 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)
• 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
• temp_air_bottom
• soil_heat_flow_3
• 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
• surface_soil_heat_flux_avg
• bowen_ratio
• wspd_arith_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• home_signal_30
• soil_temp_4
• soil_temp_5
• energy_storage_change_5
• wspd_vec_mean
• soil_temp_3
• soil_temp_2
• soil_temp_1
• 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
• sensible_heat_flux
• temp_air_top

• null(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
• 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
• wspd_arith_mean
• rh_top_fraction
• wdir_vec_mean
• home_signal
• Barometric Pressure(atmos_pressure)
• wspd_vec_mean
• temp_trh_top
• temp_air_bottom
• rh_bottom_fraction
• vapor_pressure_top
• temp_trh_bottom
• temp_air_top
• wdir_vec_std
• net_radiation
• vapor_pressure_bottom

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
• sensible_heat_flux
• latent_heat_flux
• rh_bottom_fraction
• vapor_pressure_bottom
• rh_top_fraction

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

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
• sensible_heat_flux
• 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
• sensible_heat_flux
• 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
• rh_bottom_fraction
• temp_air_bottom
• temp_trh_bottom

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.

• surface_soil_heat_flux_avg
• surface_soil_heat_flux_5
• sensible_heat_flux
• latent_heat_flux
• 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.

• surface_soil_heat_flux_avg
• surface_soil_heat_flux_4
• soil_heat_flow_4
• sensible_heat_flux
• 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.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• 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
• sensible_heat_flux
• 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
• rh_bottom_fraction
• temp_air_bottom
• temp_trh_bottom

SGP/EBBR/E9  - AEM Hung Inbetween Home Positions

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

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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  - 6 Month Checks

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

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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  - Soil Heat Flow #1 Incorrect

Soil Heat Flow #1 was incorrect.

• surface_soil_heat_flux_avg
• soil_heat_flow_1
• corr_soil_heat_flow_1
• sensible_heat_flux
• 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)
• 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
• temp_air_bottom
• soil_heat_flow_3
• 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
• surface_soil_heat_flux_avg
• bowen_ratio
• wspd_arith_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• home_signal_30
• soil_temp_4
• soil_temp_5
• energy_storage_change_5
• wspd_vec_mean
• soil_temp_3
• soil_temp_2
• soil_temp_1
• 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
• 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
• 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
• wspd_arith_mean
• rh_top_fraction
• wdir_vec_mean
• home_signal
• Barometric Pressure(atmos_pressure)
• wspd_vec_mean
• temp_trh_top
• temp_air_bottom
• rh_bottom_fraction
• vapor_pressure_top
• temp_trh_bottom
• temp_air_top
• wdir_vec_std
• net_radiation
• vapor_pressure_bottom

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

The AEM was hung in the home 30 position.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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  - Water in Net Radiometer; Surface Fluxes are Incorrect

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

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• net_radiation

SGP/EBBR/E9  - Measurements All Zero

Data values were all zero after restarting the CR10 datalogger.

• Barometric Pressure(atmos_pressure)
• 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
• temp_air_bottom
• soil_heat_flow_3
• 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
• surface_soil_heat_flux_avg
• bowen_ratio
• wspd_arith_mean
• energy_storage_change_1
• energy_storage_change_2
• energy_storage_change_3
• energy_storage_change_4
• home_signal_30
• soil_temp_4
• soil_temp_5
• energy_storage_change_5
• wspd_vec_mean
• soil_temp_3
• soil_temp_2
• soil_temp_1
• 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
• 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
• 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
• wspd_arith_mean
• rh_top_fraction
• wdir_vec_mean
• home_signal
• Barometric Pressure(atmos_pressure)
• wspd_vec_mean
• temp_trh_top
• temp_air_bottom
• rh_bottom_fraction
• vapor_pressure_top
• temp_trh_bottom
• temp_air_top
• wdir_vec_std
• net_radiation
• vapor_pressure_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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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  - 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.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• 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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wspd_vec_mean
• wdir_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.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• 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.

• latent_heat_flux
• rh_bottom_fraction
• rh_top_fraction
• temp_trh_bottom
• vapor_pressure_top
• temp_trh_top
• 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 - Wind Speed Threshhold Low

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

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wspd_vec_mean
• wdir_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.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_mean_mv

• wspd_vec_mean
• wdir_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.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• 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).

• surface_soil_heat_flux_avg
• sensible_heat_flux
• 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.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• 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.

• surface_soil_heat_flux_avg
• sensible_heat_flux
• 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(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.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• net_radiation

SGP/EBBR/E9 - Wind Speed Incorrect

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

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

SGP/EBBR/E9 - Net Radiation Incorrect

There was water in the net radiometer.  

The net radiation data was incorrect.

• net_radiation
• sensible_heat_flux
• latent_heat_flux

• net_radiation_mv

• net_radiation

SGP/EBBR/E9 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

• wspd_arith_mean
• wspd_vec_mean

• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean