SGP/EBBR - EBBR E22 Moved, Data Missing/Incorrect

During, and as a consequence of, the relocation of E22 EBBR, some data
is missing or incorrect during the period above.  The data was 
sneakernetted on 3 Nov 99, so some of the data may have been recovered.
Some of the data during the period is incorrect as a consequence of
damage done by cattle during the period; inspection of the data is
required to determine incorrect data.

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• base time(base_time)
• vapor_pressure_top
• sensible_heat_flux
• temp_reference
• wspd_arith_mean
• temp_air_bottom
• surface_soil_heat_flux_avg
• lat(lat)
• temp_trh_top
• Dummy altitude for Zeb(alt)
• wspd_vec_mean
• lon(lon)
• energy_storage_change_1
• vapor_pressure_bottom
• home_signal_30
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• net_radiation
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• home_signal_15
• Time offset of tweaks from base_time(time_offset)
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• temp_air_top
• Barometric Pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• vapor_pressure_bottom
• temp_trh_top
• lat(lat)
• net_radiation
• rh_bottom_fraction
• temp_trh_bottom
• base time(base_time)
• home_signal
• wspd_arith_mean
• temp_reference
• wdir_vec_std
• Time offset of tweaks from base_time(time_offset)
• wspd_vec_mean
• lon(lon)
• vapor_pressure_top
• wdir_vec_mean
• Dummy altitude for Zeb(alt)
• temp_air_top
• rh_top_fraction
• Barometric Pressure(atmos_pressure)
• temp_air_bottom

• battery_voltage
• temp_trh_right_rr
• Dummy altitude for Zeb(alt)
• rh_right_mv
• atmos_pressure_mv
• temp_air_left
• soil_heat_flow_3_mv
• home_signal
• base time(base_time)
• lon(lon)
• net_radiation_mv
• temp_reference_rr
• soil_temp_2_rr
• soil_temp_1_rr
• Time offset of tweaks from base_time(time_offset)
• soil_temp_4_rr
• soil_moisture_2_r
• temp_air_right
• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_5_r
• wdir_vec_mean_mv
• rh_left_mv
• soil_heat_flow_2_mv
• wspd_arith_mean
• soil_heat_flow_5_mv
• soil_temp_3_rr
• soil_moisture_1_r
• soil_heat_flow_4_mv
• lat(lat)
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_temp_5_rr

SGP/EBBR - EBBR E22 Net Radiation Incorrect

The upper dome of the net radiometer was broken, probably by migrating
birds, and water had drained into the bottom dome.  Since much of the data
is missing during the period, it is not clear exactly when the top dome was
broken during the period.  All net radiation data and sensible and latent 
heat fluxes data are incorrect for this period.

The affected data fields are:

5 minute:  q

15 minute: mv_q

30 minute: q, e, h

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP/EBBR - EBBR E22 Soil Moistures Negative

Because of the lack of rain, soil moistures were negative during much 
of the period.  All five soil moisture sensors had negative outputs by 
early on Aug 1.  The negative soil moistures affected sensible and latent
heat fluxes slightly.

The affected data are:

15 minute: r_sm1, r_sm2, r_sm3, r_sm4, r_sm5
30 minute: sm1, sm2, sm3, sm4, sm5, c_shf1, c_shf2, c_shf3, c_shf4,
           c_shf5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4, ces5,
           g1, g2, g3, g4, g5, ave_shf, e, h

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• surface_soil_heat_flux_avg
• soil_moisture_5
• energy_storage_change_1
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• sensible_heat_flux
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_r
• soil_moisture_5_r
• soil_moisture_2_r

SGP/EBBR - EBBR E22 Soil Moistures Negative

Because of the lack of rain, all soil moistures were negative during much 
of the period.  The negative soil moistures caused soil heat storage and
thus average soil heat flux to be smaller than they should have been.  The
sensible and latent heat fluxes were therefore reduced slightly 
(approximately 0-5%).

The affected data are:

15 minute: r_sm1, r_sm2, r_sm3, r_sm4, r_sm5
30 minute: sm1, sm2, sm3, sm4, sm5, c_shf1, c_shf2, c_shf3, c_shf4,
           c_shf5, cs1, cs2, cs3, cs4, cs5, ces1, ces2, ces3, ces4, ces5,
           g1, g2, g3, g4, g5, ave_shf, e, h

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• surface_soil_heat_flux_avg
• soil_moisture_5
• energy_storage_change_1
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• sensible_heat_flux
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_r
• soil_moisture_5_r
• soil_moisture_2_r

SGP/EBBR/E22 - EBBR E22 Wind Speed Iced

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

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP EBBR E22 - E22 EBBR Data Incorrect During Logger Replacement

The data was incorrect during replacement of the logger.

• null(Raw data stream - documentation not supported)

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• vapor_pressure_top
• sensible_heat_flux
• temp_reference
• wspd_arith_mean
• temp_air_bottom
• surface_soil_heat_flux_avg
• temp_trh_top
• wspd_vec_mean
• energy_storage_change_1
• vapor_pressure_bottom
• home_signal_30
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• net_radiation
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• home_signal_15
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• temp_air_top
• Barometric Pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

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

• temp_trh_right_rr
• rh_right_mv
• atmos_pressure_mv
• soil_moisture_3_rr
• temp_air_left
• soil_heat_flow_3_mv
• home_signal
• net_radiation_mv
• temp_reference_rr
• soil_temp_2_rr
• soil_temp_1_rr
• soil_temp_4_rr
• soil_moisture_2_r
• temp_air_right
• soil_moisture_2_rr
• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_rr
• soil_moisture_5_r
• wdir_vec_mean_mv
• rh_left_mv
• soil_heat_flow_2_mv
• wspd_arith_mean
• soil_heat_flow_5_mv
• soil_temp_3_rr
• soil_moisture_1_r
• soil_heat_flow_4_mv
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_moisture_4_rr
• soil_moisture_5_rr
• soil_temp_5_rr

SGP EBBR E22 - E22 EBBR Soil Moisture Lower Than Measurement Capability

The indicated measurements were incorrect because soil moisture dropped below (sometimes 
even negative) the ability of the probes to measure it.

• surface_soil_heat_flux_avg
• soil_moisture_5
• energy_storage_change_1
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• sensible_heat_flux
• soil_heat_capacity_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• latent_heat_flux
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_rr
• soil_moisture_1_r
• soil_moisture_5_r
• soil_moisture_3_rr
• soil_moisture_4_rr
• soil_moisture_2_r
• soil_moisture_5_rr
• soil_moisture_2_rr

SGP EBBR E22 - E22 EBBR Soil Moisture #3 Lower Than Can Be Measured

The soil moisture was too low to be measured correctly by probe #3.

• latent_heat_flux
• soil_heat_capacity_3
• sensible_heat_flux
• energy_storage_change_3
• surface_soil_heat_flux_avg
• surface_soil_heat_flux_3
• soil_moisture_3

• soil_moisture_3_rr
• soil_moisture_3_r

SGP EBBR E22 - E22 EBBR Net Radiation Incorrect

Water inside the domes of the net radiometer caused measurements from it to be incorrect.  
Calculated latent and sensible heat fluxes were therefore incorrect also.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP EBBR E22 - E22 EBBR Data Incorrect During 6 Month Checks

The data was incorrect during the 6 month checks.

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• vapor_pressure_top
• sensible_heat_flux
• temp_reference
• wspd_arith_mean
• temp_air_bottom
• surface_soil_heat_flux_avg
• temp_trh_top
• wspd_vec_mean
• energy_storage_change_1
• vapor_pressure_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• net_radiation
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• temp_air_top
• Barometric Pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

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

• temp_trh_right_rr
• rh_right_mv
• atmos_pressure_mv
• soil_moisture_3_rr
• temp_air_left
• soil_heat_flow_3_mv
• net_radiation_mv
• temp_reference_rr
• soil_temp_2_rr
• soil_temp_1_rr
• soil_temp_4_rr
• soil_moisture_2_r
• temp_air_right
• soil_moisture_2_rr
• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_1_rr
• soil_moisture_5_r
• wdir_vec_mean_mv
• rh_left_mv
• soil_heat_flow_2_mv
• wspd_arith_mean
• soil_heat_flow_5_mv
• soil_temp_3_rr
• soil_moisture_1_r
• soil_heat_flow_4_mv
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_moisture_4_rr
• soil_moisture_5_rr
• soil_temp_5_rr

SGP EBBR E22 - E22 EBBR 30 Minute Data Incorrect After Missing Data

Complete soil temperature information is not available
when the data is missing for the previous half hour.
Since soil temperature difference with time cannot be 
computed properly, the selected calculated quantities are incorrect.

• sensible_heat_flux
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• surface_soil_heat_flux_avg
• latent_heat_flux
• energy_storage_change_1
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

SGP/EBBR/E22 - T/RH Check

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

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

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


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

5 minute:  1650, 1655, 1700, 1705, 1710, 1715, 1720, 1725, 1730, 1735
15 minute: 1700, 1715, 1730, 1745
30 minute: 1700, 1730, 1800

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

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

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

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

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

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22 - 3-month Check

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

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22 - 6 Month Checks

The indicated measurements were incorrect during the 6 month checks.

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - Annual Calibration Changeout

On 6 November 1996 the EBBR changeout for annual calibration occurred at 
E22, Cordell, OK.  SEBS unit 7 was removed and unit 3 was installed.  Between 
1300 and 2300 GMT no data or incorrect data was collected; most of the data 
is missing.  Data for half hour 1930 GMT on 7 November is incorrect; 3 month 
calibration checks were being performed.

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• base time(base_time)
• vapor_pressure_top
• sensible_heat_flux
• temp_reference
• wspd_arith_mean
• temp_air_bottom
• surface_soil_heat_flux_avg
• lat(lat)
• temp_trh_top
• Dummy altitude for Zeb(alt)
• wspd_vec_mean
• lon(lon)
• energy_storage_change_1
• vapor_pressure_bottom
• home_signal_30
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• net_radiation
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• home_signal_15
• Time offset of tweaks from base_time(time_offset)
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• temp_air_top
• Barometric Pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

• vapor_pressure_bottom
• temp_trh_top
• lat(lat)
• net_radiation
• rh_bottom_fraction
• temp_trh_bottom
• base time(base_time)
• home_signal
• wspd_arith_mean
• temp_reference
• wdir_vec_std
• Time offset of tweaks from base_time(time_offset)
• wspd_vec_mean
• lon(lon)
• vapor_pressure_top
• wdir_vec_mean
• Dummy altitude for Zeb(alt)
• temp_air_top
• rh_top_fraction
• Barometric Pressure(atmos_pressure)
• temp_air_bottom

• battery_voltage
• temp_trh_right_rr
• Dummy altitude for Zeb(alt)
• rh_right_mv
• atmos_pressure_mv
• temp_air_left
• soil_heat_flow_3_mv
• home_signal
• base time(base_time)
• lon(lon)
• net_radiation_mv
• temp_reference_rr
• soil_temp_2_rr
• soil_temp_1_rr
• Time offset of tweaks from base_time(time_offset)
• soil_temp_4_rr
• soil_moisture_2_r
• temp_air_right
• soil_moisture_4_r
• soil_moisture_3_r
• soil_moisture_5_r
• wdir_vec_mean_mv
• rh_left_mv
• soil_heat_flow_2_mv
• wspd_arith_mean
• soil_heat_flow_5_mv
• soil_temp_3_rr
• soil_moisture_1_r
• soil_heat_flow_4_mv
• lat(lat)
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_temp_5_rr

SGP/EBBR/E22 - All Measurements Zero

The measurements are often all zero the first period after a CR10 restart, as occurred 
here.

• null(Raw data stream - documentation not supported)

• corr_soil_heat_flow_2
• corr_soil_heat_flow_1
• corr_soil_heat_flow_4
• corr_soil_heat_flow_3
• corr_soil_heat_flow_5
• vapor_pressure_top
• sensible_heat_flux
• temp_reference
• wspd_arith_mean
• temp_air_bottom
• surface_soil_heat_flux_avg
• temp_trh_top
• wspd_vec_mean
• energy_storage_change_1
• vapor_pressure_bottom
• home_signal_30
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• bowen_ratio
• soil_moisture_5
• net_radiation
• soil_moisture_1
• soil_moisture_2
• soil_moisture_3
• soil_moisture_4
• soil_heat_capacity_5
• soil_heat_capacity_4
• soil_heat_flow_2
• soil_heat_capacity_3
• soil_heat_flow_3
• soil_heat_capacity_2
• soil_heat_capacity_1
• soil_heat_flow_1
• energy_storage_change_3
• energy_storage_change_2
• energy_storage_change_5
• energy_storage_change_4
• home_signal_15
• wdir_vec_std
• soil_heat_flow_5
• soil_heat_flow_4
• soil_temp_5
• soil_temp_2
• soil_temp_1
• soil_temp_4
• soil_temp_3
• wdir_vec_mean
• temp_air_top
• Barometric Pressure(atmos_pressure)
• rh_top_fraction
• surface_soil_heat_flux_2
• surface_soil_heat_flux_1
• surface_soil_heat_flux_4
• surface_soil_heat_flux_3
• surface_soil_heat_flux_5

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

• battery_voltage
• temp_trh_right_rr
• rh_right_mv
• atmos_pressure_mv
• soil_moisture_3_rr
• temp_air_left
• soil_heat_flow_3_mv
• home_signal
• net_radiation_mv
• temp_reference_rr
• soil_temp_2_rr
• soil_temp_1_rr
• soil_temp_4_rr
• temp_air_right
• soil_moisture_2_rr
• soil_moisture_1_rr
• wdir_vec_mean_mv
• rh_left_mv
• soil_heat_flow_2_mv
• wspd_arith_mean
• soil_heat_flow_5_mv
• soil_temp_3_rr
• soil_heat_flow_4_mv
• soil_heat_flow_1_mv
• temp_trh_left_rr
• soil_moisture_4_rr
• soil_moisture_5_rr
• soil_temp_5_rr

SGP/EBBR/E22 - AEM Hung or High Home Signals

The automatic exchange mechanism hung some times and continued to switch at other times, 
although with high home signal values.  If home signal values are not in the proper 
ranges, the gradient calculation is not performed properly by the CR10 program.  Affected flux 
measurements cannot be recalculated.

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

• temp_air_left
• temp_air_right

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/E22 - Data Incorrect during 6 month checks

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

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - AEM Hung between home positions

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

There is no work-around to this problem.

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - Water inside Broken Net Rad Dome

The net radiation measurement is incorrect. Measurements 
calculated using net radiation are also incorrect.  

No work-around is possible for this situation.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E22 - home30 too large

The home30 measurements sometimes exceeded 34.9999, resulting in the
qc flag being set.

However, this does not create any data quality issues.  The qc flag is
set just to provide an alert that the automatic exchange mechanism may have a problem; in 
this case data was not affected.

An electronics repair solved the problem.

• home_signal_30

• home_signal

• home_signal

SGP/EBBR/E22 -  6 Month Checks

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

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22 - AEM Hung Inbetween Home Positions

The AEM was hung inbetween home positions.

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22 - AEM Home Signals Too High

The AEM home signals were too large at times during the indicated period;
it has been determined by the vendor that this is usually caused by electrical noise in 
the vicinity. When the 30 minute data shows a home 30 signal of 35 or more, the bowen 
ratio, and sensible and latent heat flux 
measurements are incorrect 

Removing the jumper between 4L and AG on the CR10 and adding a jumper to Multiplexer 2, 
Set 6, between L1 and L2 fixed the problem.  The
vendor intends to make this modification to all EBBR systems as they return
for re-calibration.

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

SGP/EBBR/E22  - Water in Net Radiometer, Surface Fluxes Incorrect

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

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP/EBBR/E22 - 6 Month Checks

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

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22  - 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_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22 - Wind Direction Sensor Frozen 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_std
• wdir_vec_mean
• wspd_vec_mean

• wdir_vec_mean_mv

SGP/EBBR/E22 - Wind Speed Sensor Bearings Worn

Wind speed was too low and/or often at or near zero due to
               worn bearings in the wind speed sensor.  Sensor was replaced
               3/17/04.

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22  - 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_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22  - 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_std
• wdir_vec_mean
• wspd_vec_mean

SGP/EBBR/E22 - Net Radiation Incorrect

Rain filled the bottom of the net radiometer with water, resulting
in very high net radiations.  Net radiation is incorrect during this period,
also causing sensible and latent heat fluxes to be incorrect.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E22 - Water In Net Radiometer

Water entered the Net Radiometer through a cracked upper dome, causing the
net radiation values to be too large.  As a result, latent and sensible heat flux values 
are also incorrect.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E22 - 6 Month Checks

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

• bowen_ratio
• temp_trh_top
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• temp_air_top
• temp_air_bottom
• latent_heat_flux
• temp_trh_bottom
• rh_bottom_fraction
• rh_top_fraction

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

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

SGP/EBBR/E22  - 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_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22  - 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_std
• wdir_vec_mean
• wspd_vec_mean

• wdir_vec_mean_mv

SGP/EBBR/E22  - 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_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22  - 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_std
• wdir_vec_mean
• wspd_vec_mean

• wdir_vec_mean_mv

SGP/EBBR/E22 - Net Radiation Too Low - Top Dome Broken

Net radiation values were too low because of a broken top dome.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP/EBBR/E22 - Improved EBBR CR10 Program

Effective 20050330.1930, the EBBR.E20 CR10 program was revised to improve 
the quality of the primary measurements as follows:
   
1) An RMS procedure is used to determine max and min limits of acceptable
soil heat flow.  This is applied to the individual soil sets.  Measurements
outside the limits are rejected and the measurements within the limits are
used to calculate the average soil heat flow.
   
2) Max and min limits are used to determine incorrect values of net
radiation, sensible heat flux (h), latent heat flux (e), and automatic
exchange mechanism (AEM) signal.  If AEM signal is outside the limits, h 
and e are set to 999s.  If net radiation is outside the limits, h and e are 
set to 999s. If h or e are outside the limits, h and e are set to 999s.
   
Virtually no incorrect soil measurement will affect the primary 
measurements of h and e.
   
By setting h and e to 999s, it can be easily seen that the primary 
variables are incorrect; no other interpretation is possible.
   
Prior to 20050330, the improved CR10 program was NOT in effect.  DQRs have
been submitted for known instances of incorrect soil measurements which
affected the quality of the primary measurements of h and e.
   
Note: the DQR begin date is the begin date of the sgp30ebbrE20.b1 data
stream.  The earlier version of the CR10 program was also used on previous
EBBR datastream names (e.g. sgp30ebbrE20.a1).

• latent_heat_flux
• sensible_heat_flux
• surface_soil_heat_flux_avg

SGP/EBBR/E22 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect

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

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP/EBBR/E22 - 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.

• latent_heat_flux
• sensible_heat_flux
• surface_soil_heat_flux_avg

SGP/EBBR/E22 - metadata corrections

On 20050723, a series of metadata corrections and additions were completed.  These 
metadata changes apply to all EBBR.E22 data collected by ARM back to the installation of the 
instrument in April 1993. Please see the current metadata for correct information.  These 
changes do not affect data values or quality.	

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

• base time(base_time)

• base time(base_time)

• base time(base_time)

SGP/EBBR/E22 - Sensible and Latent Heat Fluxes Incorrect

• vapor_pressure_top
• bowen_ratio
• sensible_heat_flux
• temp_air_top
• temp_trh_top
• temp_air_bottom
• latent_heat_flux
• rh_bottom_fraction
• temp_trh_bottom
• rh_top_fraction
• vapor_pressure_bottom

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

• temp_air_left
• temp_air_right

SGP/EBBR/E22 - Fluxes Incorrect When Soil Heat Flow #3 Out of Range

When soil heat flow #3 exceeded the range limit in the EBBR program, it was replaced with 
9999es.  This caused the ave_shf and the sensible and latent heat fluxes to be incorrect.

• latent_heat_flux
• sensible_heat_flux
• corr_soil_heat_flow_1
• soil_heat_flow_1
• surface_soil_heat_flux_1
• surface_soil_heat_flux_avg

SGP/EBBR/E22 - Wind Speed Sensor Frozen Stopped

The wind speed sensor was frozen to a stopped condition.

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean

SGP/EBBR/E22 - Net Radiation and Sensible and Latent Heat Fluxes Incorrect

Rain entered the net radiometer, causing net radiation, and thus sensible and latent heat 
fluxes, to be too large.

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

• net_radiation_mv

SGP/EBBR/E22 - Soil Heat Flow #4 Incorrect - Sensible and Latent Heat Fluxes Sometimes 
Affected

Soil heat flow sensor #4 dropped to low values or offscale.

Sensible and latent heat fluxes were sometimes affected.

• latent_heat_flux
• sensible_heat_flux
• corr_soil_heat_flow_4
• soil_heat_flow_4
• surface_soil_heat_flux_avg
• surface_soil_heat_flux_4

• soil_heat_flow_4_mv

SGP/EBBR/E22 - Wind Direction Incorrect

Wind direction was flat-lining at 135 degrees and occasionally changed to 0.4 degrees.

• wspd_vec_mean
• wdir_vec_mean
• wdir_vec_std

• wdir_vec_std
• wdir_vec_mean
• wspd_vec_mean

• wdir_vec_mean_mv

SGP/EBBR/E22 - H and LE Incorrect

Soil Heat Flow 1 bounced around and went offscale at times, resulting in the EBBR program 
setting sensible and latent heat fluxes to 9999es.

The problem ended during a PM visit, possibly because of routine checks and tightening of 
leads in terminal strips.

• latent_heat_flux
• sensible_heat_flux
• corr_soil_heat_flow_1
• soil_heat_flow_1
• surface_soil_heat_flux_1
• surface_soil_heat_flux_avg

• soil_heat_flow_1_mv

SGP/EBBR/E22 - Wind Speed Incorrect

The wind speed sensor was frozen stopped by freezing rain.

• wspd_vec_mean
• wspd_arith_mean

• wspd_vec_mean
• wspd_arith_mean

• wspd_arith_mean