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

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

• surface_soil_heat_flux_avg
• energy_storage_change_4
• soil_moisture_4
• latent_heat_flux
• soil_temp_4
• soil_heat_capacity_4
• corr_soil_heat_flow_4
• sensible_heat_flux
• surface_soil_heat_flux_4

• soil_temp_4_rr
• soil_moisture_4_rr

SGP/EBBR/E20 - Wrong Datalogger Program Installed

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

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

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

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

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

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

• temp_trh_top
• latent_heat_flux
• temp_trh_bottom
• vapor_pressure_bottom
• vapor_pressure_top
• sensible_heat_flux
• bowen_ratio

• temp_trh_left_rr

• vapor_pressure_bottom
• vapor_pressure_top
• temp_trh_top
• temp_trh_bottom

SGP/EBBR/E20 - Improved EBBR CR10 Program

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

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

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

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

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

• energy_storage_change_4
• soil_moisture_4
• soil_temp_4
• soil_heat_capacity_4
• surface_soil_heat_flux_4

• soil_temp_4_rr
• soil_moisture_4_rr

SGP/EBBR/E20 - Average Soil Heat Flux Incorrect

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

• surface_soil_heat_flux_avg
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E20 - metadata corrections

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

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

• base time(base_time)

• base time(base_time)

• base time(base_time)

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

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

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

• soil_temp_5_rr
• home_signal
• soil_moisture_2_rr
• soil_moisture_5_rr
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_4_mv
• wdir_vec_mean_mv
• soil_heat_flow_3_mv
• lat(lat)
• lon(lon)
• temp_air_left
• atmos_pressure_mv
• soil_temp_2_rr
• base time(base_time)
• Time offset of tweaks from base_time(time_offset)
• rh_right_mv
• temp_trh_right_rr
• wspd_arith_mean
• Dummy altitude for Zeb(alt)
• net_radiation_mv
• soil_moisture_1_rr
• soil_heat_flow_1_mv
• soil_moisture_3_rr
• temp_air_right
• soil_heat_flow_2_mv
• temp_trh_left_rr
• soil_temp_1_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_4_rr
• battery_voltage

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

SGP/EBBR/E20 - Suspect Measurements

Some measurements may be incorrect because of low supply voltage.

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

• soil_temp_5_rr
• home_signal
• soil_moisture_2_rr
• soil_moisture_5_rr
• rh_left_mv
• soil_temp_3_rr
• soil_heat_flow_4_mv
• wdir_vec_mean_mv
• soil_heat_flow_3_mv
• lat(lat)
• lon(lon)
• temp_air_left
• atmos_pressure_mv
• soil_temp_2_rr
• base time(base_time)
• Time offset of tweaks from base_time(time_offset)
• rh_right_mv
• temp_trh_right_rr
• wspd_arith_mean
• Dummy altitude for Zeb(alt)
• net_radiation_mv
• soil_moisture_1_rr
• soil_heat_flow_1_mv
• soil_moisture_3_rr
• temp_air_right
• soil_heat_flow_2_mv
• temp_trh_left_rr
• soil_temp_1_rr
• soil_moisture_4_rr
• soil_heat_flow_5_mv
• temp_reference_rr
• soil_temp_4_rr
• battery_voltage

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

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

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

• latent_heat_flux
• sensible_heat_flux
• net_radiation

• net_radiation

SGP/EBBR/E2 - Net Radiation and Fluxes Incorrect

The net radiometer was tipped 37 degrees eastward, resulting in apparent
solar noon being 2.5 hours early.  The net radiation error results in incorrect sensible 
and latent heat fluxes.

• net_radiation

• net_radiation_mv

• net_radiation
• latent_heat_flux
• sensible_heat_flux

SGP/EBBR/E2 - AEM Ventilator Dangling - Sensible and Latent Heat Fluxes Incorrect

The right AEM ventilator unit with temperature and humidity sensors inside was dangling 
from the AEM.  Therefore, the gradients of temperature and relative humidity and thus 
sensible and latent heat flux are suspect for this period.  Often, the fluxes look reasonable.

• temp_trh_right_rr
• rh_right_mv
• temp_air_right

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

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