DQR ID | Subject | Data Streams Affected |
---|---|---|
D000210.3 | SGP/EBBR - EBBR E22 Moved, Data Missing/Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D000210.4 | SGP/EBBR - EBBR E22 Net Radiation Incorrect | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D000301.11 | SGP/EBBR - EBBR E22 Soil Moistures Negative | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D000302.2 | SGP/EBBR - EBBR E22 Soil Moistures Negative | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D010213.8 | SGP/EBBR/E22 - EBBR E22 Wind Speed Iced | sgp30ebbrE22.b1, sgp15ebbrE22.b1, sgp5ebbrE22.b1 |
D010427.11 | SGP EBBR E22 - E22 EBBR Data Incorrect During Logger Replacement | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
D010427.13 | SGP EBBR E22 - E22 EBBR Soil Moisture Lower Than Measurement Capability | sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
D010427.14 | SGP EBBR E22 - E22 EBBR Soil Moisture #3 Lower Than Can Be Measured | sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
D010427.15 | SGP EBBR E22 - E22 EBBR Net Radiation Incorrect | sgp15ebbrE22.b1, sgp5ebbrE22.b1, sgp30ebbrE22.b1 |
D011127.32 | SGP EBBR E22 - E22 EBBR Data Incorrect During 6 Month Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D011206.4 | SGP EBBR E22 - E22 EBBR 30 Minute Data Incorrect After Missing Data | sgp30ebbrE22.b1 |
D020628.19 | SGP/EBBR/E22 - T/RH Check | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D020628.5 | SGP/EBBR/E22 - 3-month Check | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D020716.17 | SGP/EBBR/E22 - 6 Month Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D020716.3 | SGP/EBBR/E22 - Annual Calibration Changeout | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D020717.34 | SGP/EBBR/E22 - All Measurements Zero | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.00, sgp5ebbrE22.b1 |
D020717.35 | SGP/EBBR/E22 - AEM Hung or High Home Signals | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D021113.1 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
D021113.4 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
D030110.26 | SGP/EBBR/E22 - Data Incorrect during 6 month checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D030117.16 | SGP/EBBR/E22 - AEM Hung between home positions | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D030117.17 | SGP/EBBR/E22 - Water inside Broken Net Rad Dome | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D030711.7 | SGP/EBBR/E22 - home30 too large | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D030712.22 | SGP/EBBR/E22 - 6 Month Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D030729.4 | SGP/EBBR/E22 - AEM Hung Inbetween Home Positions | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D030916.2 | SGP/EBBR/E22 - AEM Home Signals Too High | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D031031.8 | SGP/EBBR/E22 - Water in Net Radiometer, Surface Fluxes Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D031204.20 | SGP/EBBR/E22 - 6 Month Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D031222.21 | SGP/EBBR/E22 - Wind Speed Sensor Frozen By Ice Storm | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D031222.22 | SGP/EBBR/E22 - Wind Direction Sensor Frozen By Ice Storm | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D040303.2 | SGP/EBBR/E22 - Wind Speed Sensor Bearings Worn | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D040304.21 | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D040304.22 | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D040706.2 | SGP/EBBR/E22 - Net Radiation Incorrect | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D040723.3 | SGP/EBBR/E22 - Water In Net Radiometer | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D041222.17 | SGP/EBBR/E22 - 6 Month Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050206.15 | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050207.11 | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice Storm | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050215.21 | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050215.22 | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050323.2 | SGP/EBBR/E22 - Net Radiation Too Low - Top Dome Broken | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D050719.14 | SGP/EBBR/E22 - Improved EBBR CR10 Program | sgp30ebbrE22.b1 |
D051106.13 | SGP/EBBR/E22 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D051106.29 | SGP/EBBR/E22 - Average Soil Heat Flux Incorrect | sgp30ebbrE22.b1 |
D051112.8 | SGP/EBBR/E22 - metadata corrections | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D060112.1 | SGP/EBBR/E22 - Sensible and Latent Heat Fluxes Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D060428.4 | SGP/EBBR/E22 - Fluxes Incorrect When Soil Heat Flow #3 Out of Range | sgp30ebbrE22.b1 |
D060501.25 | SGP/EBBR/E22 - Wind Speed Sensor Frozen Stopped | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D060921.8 | SGP/EBBR/E22 - Net Radiation and Sensible and Latent Heat Fluxes Incorrect | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D061106.5 | SGP/EBBR/E22 - Soil Heat Flow #4 Incorrect - Sensible and Latent Heat Fluxes Sometimes Affected | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D061220.13 | SGP/EBBR/E22 - Wind Direction Dependency of Surface Fluxes and General Data Quality Information | sgp30ebbrE22.b1 |
D070426.1 | SGP/EBBR/E22 - Wind Direction Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D070815.6 | SGP/EBBR/E22 - H and LE Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D090313.6 | SGP/EBBR/E22 - Wind Speed Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D940105.10 | SGP/EBBR/E22 - Air Temperature Sensor malfunction | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D940105.7 | SGP/EBBR/E22 - Incorrect averaging interval at E22 | sgp30ebbrE22.b1 |
D941021.10 | SGP/EBBR/E22 - Net Radiometer Hemisphere Changes | sgp5ebbrE22.b1, sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
D960104.3 | SGP/EBBR/E22 - Wind Speed Cups Frozen | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D960408.2 | SGP/EBBR/E22 - Reprocess: Soil Heat Flow Sensor 4 Incorrect Data | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D960508.9 | SGP/EBBR/E22 - 3-month check | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D961122.2 | SGP/EBBR/E22 - Annual Calibration Changeout | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D961122.27 | SGP/EBBR/E22 - EBBR 3 Month Checks - 10 EFs | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D970707.1 | SGP/EBBR/E22 - Reprocess: E22 Soil Heat Flow Sensor # 5 Incorrect Data | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D970730.1 | SGP/EBBR/E22 - Right Aspirator Unit Stolen | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D971017.7 | SGP/EBBR/E22 - Reprocess: E22 EBBR Soil Heat Flow Probe #5 Incorrect Data | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D971021.8 | SGP/EBBR/E22 - EBBR Biannual Checks | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D980117.1 | SGP/EBBR/E22 - Reprocess: E22 Soil Moisture Values Off End of Calibration at High Soil Moistures | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
D980413.5 | SGP/EBBR/E22 - Low Battery - Resulting In Incorrect Data | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D980416.17 | SGP/EBBR/E22 - 3-Month Check | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
D980529.15 | SGP/EBBR/E22 - Six Month Checks | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
D990127.2 | SGP/EBBR/E22 - Battery Voltage Low, Data Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
D990127.30 | SGP/EBBR/E22 - Wind Direction Data Incorrect | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
D990316.1 | SGP/EBBR/E22 - Right Aspirator Fan Replaced | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/1999 | 1415 | 11/02/1999 | 2030 |
Subject: | SGP/EBBR - EBBR E22 Moved, Data Missing/Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/1999 | 1430 | 11/03/1999 | 1930 |
Subject: | SGP/EBBR - EBBR E22 Net Radiation Incorrect |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | 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 |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/1999 | 0300 | 08/04/1999 | 1730 |
Subject: | SGP/EBBR - EBBR E22 Soil Moistures Negative |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | 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 |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/15/1999 | 0800 | 10/30/1999 | 0300 |
Subject: | SGP/EBBR - EBBR E22 Soil Moistures Negative |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | 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 |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/25/2000 | 1315 | 12/27/2000 | 2015 |
Subject: | SGP/EBBR/E22 - EBBR E22 Wind Speed Iced |
DataStreams: | sgp30ebbrE22.b1, sgp15ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2000 | 1900 | 04/05/2000 | 1901 |
04/05/2000 | 2000 | 04/05/2000 | 2001 |
Subject: | SGP EBBR E22 - E22 EBBR Data Incorrect During Logger Replacement |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
Description: | The data was incorrect during replacement of the logger. |
Measurements: | sgp5ebbrE22.00:
sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/21/2000 | 1900 | 04/27/2000 | 1031 |
05/10/2000 | 2000 | 06/11/2000 | 0531 |
07/08/2000 | 1800 | 10/16/2000 | 0231 |
Subject: | SGP EBBR E22 - E22 EBBR Soil Moisture Lower Than Measurement Capability |
DataStreams: | sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | The indicated measurements were incorrect because soil moisture dropped below (sometimes even negative) the ability of the probes to measure it. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/16/2000 | 0235 | 10/22/2000 | 0316 |
Subject: | SGP EBBR E22 - E22 EBBR Soil Moisture #3 Lower Than Can Be Measured |
DataStreams: | sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | The soil moisture was too low to be measured correctly by probe #3. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/16/2000 | 0130 | 10/18/2000 | 1841 |
Subject: | SGP EBBR E22 - E22 EBBR Net Radiation Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp5ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/18/2001 | 1715 | 04/18/2001 | 1821 |
10/10/2001 | 1800 | 10/10/2001 | 1857 |
Subject: | SGP EBBR E22 - E22 EBBR Data Incorrect During 6 Month Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The data was incorrect during the 6 month checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2001 | 2000 | 03/07/2001 | 2001 |
Subject: | SGP EBBR E22 - E22 EBBR 30 Minute Data Incorrect After Missing Data |
DataStreams: | sgp30ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/08/1994 | 1650 | 11/08/1994 | 1800 |
Subject: | SGP/EBBR/E22 - T/RH Check |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1995 | 1630 | 10/11/1995 | 1930 |
Subject: | SGP/EBBR/E22 - 3-month Check |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/15/2002 | 1810 | 05/15/2002 | 1846 |
Subject: | SGP/EBBR/E22 - 6 Month Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The indicated measurements were incorrect during the 6 month checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/07/1996 | 1901 | 11/07/1996 | 1930 |
11/06/1996 | 1300 | 11/06/1996 | 2300 |
Subject: | SGP/EBBR/E22 - Annual Calibration Changeout |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/2002 | 1845 | 02/07/2002 | 1901 |
Subject: | SGP/EBBR/E22 - All Measurements Zero |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.00, sgp5ebbrE22.b1 |
Description: | The measurements are often all zero the first period after a CR10 restart, as occurred here. |
Measurements: | sgp5ebbrE22.00:
sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2002 | 0515 | 01/15/2002 | 0031 |
02/08/2002 | 0845 | 02/08/2002 | 2031 |
01/09/2002 | 1545 | 01/12/2002 | 0001 |
02/08/2002 | 2145 | 02/14/2002 | 2001 |
02/14/2002 | 2015 | 02/16/2002 | 1531 |
02/16/2002 | 1945 | 02/17/2002 | 0001 |
02/17/2002 | 0415 | 02/20/2002 | 0531 |
02/20/2002 | 0815 | 02/20/2002 | 1831 |
02/28/2002 | 1030 | 03/06/2002 | 1901 |
04/21/2002 | 2000 | 05/29/2002 | 1831 |
12/17/2001 | 1230 | 01/09/2002 | 1531 |
Subject: | SGP/EBBR/E22 - AEM Hung or High Home Signals |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 06/18/2003 | 2359 |
Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR |
DataStreams: | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE18.b1, sgp30ebbrE19.b1, sgp30ebbrE2.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE2.b1:
sgp30ebbrE26.b1:
sgp30ebbrE9.b1:
sgp30ebbrE22.b1:
sgp30ebbrE13.b1:
sgp30ebbrE7.b1:
sgp30ebbrE18.b1:
sgp30ebbrE12.b1:
sgp30ebbrE4.b1:
sgp30ebbrE15.b1:
sgp30ebbrE19.b1:
sgp30ebbrE20.b1:
sgp30ebbrE8.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/1993 | 1200 | 06/18/2003 | 1159 |
Subject: | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR |
DataStreams: | sgp30ebbrE12.b1, sgp30ebbrE13.b1, sgp30ebbrE15.b1, sgp30ebbrE20.b1, sgp30ebbrE22.b1, sgp30ebbrE26.b1, sgp30ebbrE4.b1, sgp30ebbrE7.b1, sgp30ebbrE8.b1, sgp30ebbrE9.b1 |
Description: | 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.) |
Measurements: | sgp30ebbrE26.b1:
sgp30ebbrE9.b1:
sgp30ebbrE7.b1:
sgp30ebbrE4.b1:
sgp30ebbrE12.b1:
sgp30ebbrE15.b1:
sgp30ebbrE22.b1:
sgp30ebbrE13.b1:
sgp30ebbrE8.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2002 | 1900 | 11/13/2002 | 1930 |
Subject: | SGP/EBBR/E22 - Data Incorrect during 6 month checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Some of the measurements are incorrect during the 6 month checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/04/2002 | 1715 | 09/04/2002 | 1730 |
10/13/2002 | 1300 | 10/15/2002 | 1930 |
10/15/2002 | 2145 | 10/15/2002 | 1630 |
10/13/2002 | 1230 | 10/13/2002 | 1234 |
Subject: | SGP/EBBR/E22 - AEM Hung between home positions |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/29/2002 | 0830 | 08/07/2002 | 1800 |
Subject: | SGP/EBBR/E22 - Water inside Broken Net Rad Dome |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The net radiation measurement is incorrect. Measurements calculated using net radiation are also incorrect. No work-around is possible for this situation. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2003 | 0000 | 06/25/2003 | 1700 |
Subject: | SGP/EBBR/E22 - home30 too large |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/30/2003 | 1720 | 04/30/2003 | 1800 |
Subject: | SGP/EBBR/E22 - 6 Month Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/16/2003 | 0330 | 07/23/2003 | 1830 |
07/24/2003 | 1500 | 08/06/2003 | 1730 |
Subject: | SGP/EBBR/E22 - AEM Hung Inbetween Home Positions |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | The AEM was hung inbetween home positions. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/16/2003 | 1745 | 09/17/2003 | 1900 |
Subject: | SGP/EBBR/E22 - AEM Home Signals Too High |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2003 | 1800 | 10/01/2003 | 1630 |
Subject: | SGP/EBBR/E22 - Water in Net Radiometer, Surface Fluxes Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2003 | 1900 | 10/15/2003 | 1930 |
Subject: | SGP/EBBR/E22 - 6 Month Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2003 | 1810 | 12/13/2003 | 2100 |
Subject: | SGP/EBBR/E22 - Wind Speed Sensor Frozen By Ice Storm |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind speed sensor was frozen stopped by ice from a storm. The wind speed and residual wind speed measurements are incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/2003 | 2345 | 12/14/2003 | 1520 |
Subject: | SGP/EBBR/E22 - Wind Direction Sensor Frozen By Ice Storm |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/2003 | 0000 | 03/17/2004 | 1835 |
Subject: | SGP/EBBR/E22 - Wind Speed Sensor Bearings Worn |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/24/2004 | 2345 | 01/25/2004 | 0135 |
02/01/2004 | 1920 | 02/02/2004 | 1740 |
02/03/2004 | 0350 | 02/03/2004 | 1440 |
02/05/2004 | 0925 | 02/05/2004 | 1615 |
Subject: | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/05/2004 | 1120 | 02/05/2004 | 1500 |
Subject: | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/22/2004 | 0400 | 06/23/2004 | 1650 |
Subject: | SGP/EBBR/E22 - Net Radiation Incorrect |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 1330 | 07/07/2004 | 1900 |
Subject: | SGP/EBBR/E22 - Water In Net Radiometer |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/27/2004 | 1700 | 10/27/2004 | 1730 |
Subject: | SGP/EBBR/E22 - 6 Month Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0845 | 01/07/2005 | 1555 |
Subject: | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0855 | 01/06/2005 | 1940 |
Subject: | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2005 | 0915 | 01/11/2005 | 2100 |
Subject: | SGP/EBBR/E22 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2005 | 1730 | 01/11/2005 | 1825 |
Subject: | SGP/EBBR/E22 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind direction sensor was frozen stopped by ice from a storm. The wind direction, sigma_wd, and residual wind speed measurements are incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/06/2005 | 1400 | 03/16/2005 | 1900 |
Subject: | SGP/EBBR/E22 - Net Radiation Too Low - Top Dome Broken |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Net radiation values were too low because of a broken top dome. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 03/30/2005 | 1930 |
Subject: | SGP/EBBR/E22 - Improved EBBR CR10 Program |
DataStreams: | sgp30ebbrE22.b1 |
Description: | 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). |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2005 | 2000 | 08/31/2005 | 1730 |
Subject: | SGP/EBBR/E22 - Net Radiation Incorrect; Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The net radiometer top dome was broken and water got inside, making the net radiation, and sensible and latent heat flux measurements incorrect. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/16/2005 | 1830 | 03/30/2005 | 1930 |
Subject: | SGP/EBBR/E22 - Average Soil Heat Flux Incorrect |
DataStreams: | sgp30ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0000 | 07/22/2005 | 2359 |
Subject: | SGP/EBBR/E22 - metadata corrections |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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") |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/10/2006 | 0730 | 01/18/2006 | 2000 |
Subject: | SGP/EBBR/E22 - Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2006 | 1900 | 05/24/2006 | 1700 |
Subject: | SGP/EBBR/E22 - Fluxes Incorrect When Soil Heat Flow #3 Out of Range |
DataStreams: | sgp30ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/21/2006 | 1130 | 01/21/2006 | 1700 |
01/22/2006 | 0100 | 01/22/2006 | 0730 |
Subject: | SGP/EBBR/E22 - Wind Speed Sensor Frozen Stopped |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind speed sensor was frozen to a stopped condition. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/2006 | 0630 | 08/30/2006 | 1800 |
Subject: | SGP/EBBR/E22 - Net Radiation and Sensible and Latent Heat Fluxes Incorrect |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | Rain entered the net radiometer, causing net radiation, and thus sensible and latent heat fluxes, to be too large. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/16/2006 | 0000 | 11/08/2006 | 1940 |
Subject: | SGP/EBBR/E22 - Soil Heat Flow #4 Incorrect - Sensible and Latent Heat Fluxes Sometimes |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Soil heat flow sensor #4 dropped to low values or offscale. Sensible and latent heat fluxes were sometimes affected. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/04/1993 | 1200 | 10/12/2003 | 2330 |
Subject: | SGP/EBBR/E22 - Wind Direction Dependency of Surface Fluxes and General Data Quality |
DataStreams: | sgp30ebbrE22.b1 |
Description: | Beginning in FY2006, Data Quality Reports are not written for missing data or for situations when qc flags clearly show that the data is incorrect (this is true for most of the conditions listed below). DQRs are written for periods when data is incorrect, when the situation is not represented by qc flags in the data, and it's not obvious that the data should have been flagged as incorrect. The EBBR data is only useful for particular wind directions at each Extended Facility. Please use the following resources to help in interpreting the EBBR data. 1) qc flags in the EBBR data. 2) Instrument Mentor Monthly Summaries (IMMS) at http://www.db.arm.gov/IMMS/ 3) SGP EF Surface Conditions Observations (EFSCO) at http://198.124.96.210:591/sfc_cond1/default.htm 4) Surface fluxes are valid only for the following wind directions (in degrees): 0-49, 139-360 Note that there are wind directions at most sites for which the fetch is insufficient and therefore EBBR data is invalid. Appropriate fetch was determined from a 1/40 measurement height to fetch ratio, resulting in a required minimum fetch of 120 m. Particular attention should be paid to the limited valid wind directions for the Central Facility EBBR. The surface vegetation type for the EBBRs is grazed or ungrazed grassland (refer to the EFSCO for state). 5) Some conditions that commonly cause the EBBR primary measurements to be incorrect or missing follow: a) Sensible and latent heat fluxes are not accurate during times when the Automatic Exchange Mechanism (AEM) is not functioning properly. The AEM switches the gradient measuring instrumentation between the top and bottom positions every 15 minutes; this reduces the effects of instrument offsets. Sometimes the AEM does not reach it's full extent of travel, resulting in the home signal being zero. b) Sensible and latent heat fluxes are sometimes incorrect when surface soil heat flow is out of range, as seen in the average soil heat flux (ave_shf). c) Very light winds may be seen at nights for brief periods. Wind direction flops around a lot during low wind conditions (< 1.5 m/s) and is often unreliable during those periods. d) Missing data periods occur at times; this is usually a site data system collection/communication problem; it can also occur during replacement of the system with a newly calibrated unit. Missing data is sometimes filled in later from manual or automatic re-collection of the data. |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2007 | 0400 | 04/26/2007 | 1630 |
Subject: | SGP/EBBR/E22 - Wind Direction Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Wind direction was flat-lining at 135 degrees and occasionally changed to 0.4 degrees. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2007 | 0630 | 08/01/2007 | 2200 |
Subject: | SGP/EBBR/E22 - H and LE Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2009 | 1845 | 01/28/2009 | 1810 |
Subject: | SGP/EBBR/E22 - Wind Speed Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/1993 | 0000 | 12/21/1993 | 1800 |
Subject: | SGP/EBBR/E22 - Air Temperature Sensor malfunction |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | The right air temperature probe (thermocouple) malfunctioned during the periods stated above at Cordell, OK (E22). It was replaced on December 21, 1993 and good data began again with the 1830 GMT half hour average. For the periods of interest, 5 and 30 minute values of tair_top and tair_bot are incorrect when the right probe was in the specified position; 15 minute values of tair_r are incorrect; and 30 minute values of bowen, e, and h are incorrect. None of these values are recoverable or recalculatable through the use of other quantities since both air temperature probes are needed to determine bowen ratio. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/09/1993 | 1700 | 11/22/1993 | 1700 |
Subject: | SGP/EBBR/E22 - Incorrect averaging interval at E22 |
DataStreams: | sgp30ebbrE22.b1 |
Description: | On November 9, 1993 version 4 of the EBBR program installed at Cordell, OK (E22) was mistakenly modified in one area during the process of modifying a calibration in another part of the program. The mistaken modification was a change in the execution interval from 30 seconds to 10 seconds. This modification remained in the program until November 22, 1993 when it was discovered and changed back to a 30 second execution interval. The modification produced no ill effects as the execution interval only changes sampling and averaging periods. A 10 second execution interval results in three times as many samples being taken, which, when averaged, should actually produce more accurate results. Therefore, data quality was not affected. This PIF was written only to document the fact that the mistaken modification was made, and when it was made. |
Measurements: | sgp30ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/13/1994 | 1600 | 09/27/1994 | 1600 |
Subject: | SGP/EBBR/E22 - Net Radiometer Hemisphere Changes |
DataStreams: | sgp5ebbrE22.b1, sgp30ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | The upper hemisphere of the net radiometer at the site was punctured allowing water to collect in the lower (and sometimes upper) section of the sensor. The punctures are most likely the result of migratory birds (a problem that we have experienced almost every year here at ANL also). The punctures (and water in some net radiometers) did not result in obvious invalidation of the data. Whether there is water in the lower hemisphere or not, a small puncture of the upper hemisphere would not have a major effect on the net radiation measurement. Significant amounts of water in the lower hemisphere should have a major effect on nighttime measurements particularly, although that effect is hard to detect in the data. The date when the puncture occurred is approximate - but is certainly no more than two weeks before the hemisphere was replaced. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/1995 | 1705 | 12/19/1995 | 1450 |
Subject: | SGP/EBBR/E22 - Wind Speed Cups Frozen |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | Freezing rain, snow, and below freezing conditions during 18-19 January 1995 caused the wind speed sensor cups to freeze in a stopped state at E22, Cordell, OK on 18 January 1995. When temperatures rose to above freezing on 19 January, the ice thawed and the cups turned freely again. Measurements affected by the stalled wind speed sensor include: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/10/1996 | 0230 | 02/10/1996 | 1300 |
02/10/1996 | 1400 | 02/10/1996 | 1600 |
02/11/1996 | 0100 | 02/11/1996 | 0900 |
02/11/1996 | 1030 | 02/11/1996 | 1400 |
02/11/1996 | 1730 | 02/12/1996 | 0100 |
02/12/1996 | 1200 | 02/12/1996 | 1230 |
02/13/1996 | 0130 | 02/13/1996 | 0230 |
02/13/1996 | 1600 | 02/13/1996 | 1700 |
02/14/1996 | 0130 | 02/14/1996 | 0230 |
02/23/1996 | 0330 | 02/23/1996 | 0530 |
02/23/1996 | 1200 | 02/24/1996 | 0200 |
02/28/1996 | 2330 | 02/29/1996 | 0000 |
03/03/1996 | 1500 | 03/03/1996 | 1830 |
03/04/1996 | 0100 | 03/04/1996 | 0230 |
03/04/1996 | 0400 | 03/04/1996 | 1530 |
03/05/1996 | 1200 | 03/05/1996 | 1430 |
03/05/1996 | 1630 | 03/05/1996 | 1830 |
03/06/1996 | 0200 | 03/07/1996 | 0430 |
03/07/1996 | 2300 | 03/07/1996 | 2330 |
03/08/1996 | 0330 | 03/08/1996 | 1730 |
03/10/1996 | 0400 | 03/10/1996 | 1130 |
03/12/1996 | 0400 | 03/12/1996 | 1130 |
03/12/1996 | 1430 | 03/12/1996 | 1600 |
03/13/1996 | 0830 | 03/13/1996 | 1130 |
03/16/1996 | 0400 | 03/16/1996 | 0830 |
03/16/1996 | 1030 | 03/16/1996 | 1200 |
03/16/1996 | 1500 | 03/16/1996 | 1700 |
03/17/1996 | 0600 | 03/17/1996 | 0630 |
03/17/1996 | 0730 | 03/17/1996 | 2030 |
03/18/1996 | 0300 | 03/18/1996 | 1730 |
03/20/1996 | 1700 | 03/20/1996 | 1830 |
03/21/1996 | 0200 | 03/21/1996 | 0230 |
03/22/1996 | 0330 | 03/22/1996 | 0400 |
03/22/1996 | 1600 | 03/22/1996 | 1700 |
03/23/1996 | 0400 | 03/23/1996 | 1930 |
03/27/1996 | 1800 | 03/27/1996 | 2000 |
01/31/1996 | 1430 | 01/31/1996 | 1500 |
02/12/1996 | 1600 | 02/12/1996 | 1830 |
03/03/1996 | 0130 | 03/03/1996 | 0200 |
03/07/1996 | 2030 | 03/07/1996 | 2130 |
03/19/1996 | 0130 | 03/20/1996 | 1430 |
03/24/1996 | 2200 | 03/25/1996 | 1500 |
02/13/1996 | 1400 | 02/13/1996 | 1430 |
03/15/1996 | 0400 | 03/15/1996 | 2200 |
Subject: | SGP/EBBR/E22 - Reprocess: Soil Heat Flow Sensor 4 Incorrect Data |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Soil heat flow sensor #4 periodically output incorrect values during the period indicated. The output often indicated large negative heat flow. The sensor was replaced on March 19, 1996, which corrected the problem. The data affected (and thus incorrect) includes: 15 minute: mv_hft4 30 minute: shf4, c_shf4, g4, ave_shf, e, h. The dates and times (GMT) of incorrect values are listed below. Only half hour data times are listed. 01/31/96 1500 (shf4 only) 02/10/96 0230-1300, 1400-1600 02/11/96 0100-0900, 1030-1400, 1730-2330 02/12/96 0000-0100, 1200-1230, 1600-1830 02/13/96 0130-0230, 1430, 1600-1700 02/14/96 0130-0230 02/23/96 0330-0530, 1200-2330 02/24/96 0000-0200 02/29/96 0000 03/03/96 0130-0200, 1500-1830 03/04/96 0100-0230, 0400-1530 03/05/96 1200-1430, 1630-1830 03/06/96 0200-2330 03/07/96 0000-0430, 2030-2130, 2330 03/08/96 0330-1730 03/10/96 0400-1130 03/12/96 0400-1130, 1430-1600 03/13/96 0830-1130 03/15/96 0400-2200 03/16/96 0400-0830, 1030-1200, 1500-1700 03/17/96 0630, 0730-2030 03/18/96 0300-1730 03/19/96 0130-2330 03/20/96 0000-1430, 1700-1830 03/21/96 0230 03/22/96 0400, 1600-1700 03/23/96 0400-1930 03/24/96 2200-2330 03/25/96 0000-1500 03/27/96 1800-2000 The latent and sensible heat fluxes can be recalculated by using only soil heat flows 1, 2, 3, and 5 to calculate the average soil heat flow, ave_shf = (g1 + g2 + g3 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q) |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/24/1996 | 1315 | 04/24/1996 | 1402 |
Subject: | SGP/EBBR/E22 - 3-month check |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during this period, at least, do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. The period of incorrect data for the EBBR is listed in the times indicated; data times affected do not include the beginning time and do include the ending time (data files are denoted by the end time). |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1996 | 1300 | 11/06/1996 | 2300 |
Subject: | SGP/EBBR/E22 - Annual Calibration Changeout |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | 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. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1996 | 1500 | 11/06/1996 | 1553 |
Subject: | SGP/EBBR/E22 - EBBR 3 Month Checks - 10 EFs |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/14/1997 | 0000 | 04/09/1997 | 1730 |
Subject: | SGP/EBBR/E22 - Reprocess: E22 Soil Heat Flow Sensor # 5 Incorrect Data |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Soil heat flow sensor #5 frequently produced large negative (and incorrect) values during the period above. The problem ended during a PM visit by site operations. However, there is no documentation by Site Operations in the instrumentation report or corrective maintenance report that Site Operations personnel took action to correct the problem. Site Operations also told me that they have no record of any changes or corrective maintenance. Apparently, something fortuitous happened during the PM to correct the problem. The start date and time of the problem cannot be determined exactly, but it did begin during a period of missing data from Feb. 14-25, 1997. Values affected (and thus incorrect) include: 15 minute: mv_hft5 30 minute: shf5, c_shf5, g5, ave_shf, e, h. The latent and sensible heat fluxes can be recalculated by using only soil heat flows 1, 2, 3, and 4 to calculate the average soil heat flow, ave_shf = (g1 + g2 + g3 + g4)/4 e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q) |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/13/1997 | 0305 | 07/16/1997 | 1500 |
Subject: | SGP/EBBR/E22 - Right Aspirator Unit Stolen |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | On 13 June 1997, vandals stole the right AEM aspirator unit, including the thermocouple and T/RH probe inside. These were replaced on 16 July 1997. Incorrect data fields during the period above are: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot 15 minute: rr_thum_r, mv_hum_r, tair_r 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, bowen, e, h |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/30/1997 | 1700 | 07/30/1997 | 1830 |
Subject: | SGP/EBBR/E22 - Reprocess: E22 EBBR Soil Heat Flow Probe #5 Incorrect Data |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Soil heat flow probe #5 produced large negative (and incorrect) values during the period above. The probe was replaced. Somehow, two half hour records were produced at 1900 GMT as a result, the first record having 9s for the data fields; the second record is correct. Values affected (and thus incorrect) include: 15 minute: mv_hft5 30 minute: shf5, c_shf5, g5, ave_shf, e, h. The latent and sensible heat fluxes can be recalculated by using only soil heat flows 1, 2, 3, and 4 to calculate the average soil heat flow, ave_shf = (g1 + g2 + g3 + g4)/4 e = -(q + ave_shf)/(1 + bowen) h = -(e + ave_shf + q) |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/23/1997 | 1525 | 04/23/1997 | 1605 |
Subject: | SGP/EBBR/E22 - EBBR Biannual Checks |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | During EBBR 6 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for periods indicated. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/1997 | 0000 | 04/21/2000 | 1640 |
Subject: | SGP/EBBR/E22 - Reprocess: E22 Soil Moisture Values Off End of Calibration at High Soil |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Intermittently, since November 1997 soil moisture probes 1, 2, and 3 indicate small positive or else negative values when soil moisture is high (greater than 35%). This situation is similar to that at the Cement EBBR, although the soil at Cordell is not capable of holding as much water as that at Cement. The cause of the problem is inadequate range in the calibration curve equation. Very high soil moisture cannot be obtained with the calibration soil used by REBS. The soil moisture equations could be manipulated to allow larger soil moistures to be calculated. However, the infrequency of occurence does not justify doing so. The soil moisture data must be inspected by the data user to see when soil moisture values for one or more probes is inconsistent with the others. Recalculation of ave_shf, e, and h must be made using only the soil moisture sets with correct soil moisture values. Affected data values are (# for probe number): 15 minute: rr_sm# 30 minute: sm#, c_shf#, cs#, ces#, g#, ave_shf, e, h Sensible, latent, and soil heat fluxes can be recalculated using the soil probe sets that provide correct data. For example, if soil moisture 2 is incorrect, ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), If soil moistures 1 and 2 are incorrect, ave_shf = (g3 + g4 + g5)/3 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), If soil moistures 1, 2, and 3 are incorrect, ave_shf = (g4 + g5)/2 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q), etc. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/1998 | 0300 | 01/15/1998 | 1415 |
Subject: | SGP/EBBR/E22 - Low Battery - Resulting In Incorrect Data |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | A low battery condition (less than 10.5 volts) caused a number of data fields to be incorrect at some times and all data fields to be incorrect at a more limited number of times. All data fields are suspect when the battery voltage drops below 10.5 volts because the CR10 cannot operate properly. Some sensors are affected slightly (i.e. pressure) at slightly larger voltages. The low battery condition resulted from an initially weak battery and a week of extremely low solar radiation (from heavy cloudiness) on the solar panel that provides most of the charging of the battery. Comments added by Marv Wesely: David Cook has been working with Dave Breedlove to try to assess the age of the batteries. The dates on the batteries needs to be read during site visits and provided to David C. It's quite possible that they need to be replaced. It's work in progress, though slow at times. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/08/1997 | 1830 | 10/08/1997 | 1902 |
Subject: | SGP/EBBR/E22 - 3-Month Check |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1 |
Description: | During EBBR 3 month checks the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period above. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/1998 | 1800 | 05/06/1998 | 1840 |
Subject: | SGP/EBBR/E22 - Six Month Checks |
DataStreams: | sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp15ebbrE22.b1 |
Description: | During EBBR 6 month checks (formally called 3 month checks) the Automatic Exchange Mechanism is disabled (reflected by home signals near zero) so that the two aspirator units can be placed at the same height. The measurements during these periods do not produce correct outputs of bowen ratio (bowen), sensible heat flux (h), or latent heat flux (e), nor do the air temperature and relative humidity measurements indicate correct gradients. Checks performed just before or after the AEM is disabled also lead to some incorrect data. Incorrect 5, 15 minute and half hour data occurs for the period indicated. |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/1998 | 0615 | 11/10/1998 | 1430 |
Subject: | SGP/EBBR/E22 - Battery Voltage Low, Data Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
Description: | Battery voltages less than 10.4 volts occurred much of the time. All data should be considered incorrect when the voltage is less than 10.4 volts. |
Measurements: | sgp5ebbrE22.00:
sgp30ebbrE22.b1:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/1999 | 2355 | 01/08/1999 | 1100 |
Subject: | SGP/EBBR/E22 - Wind Direction Data Incorrect |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1, sgp5ebbrE22.b1, sgp5ebbrE22.00 |
Description: | The wind direction sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: res_ws, wind_d, sigma_wd 15 minute: mv_wind_d 30 minute: res_ws, wind_d, sigma_wd |
Measurements: | sgp30ebbrE22.b1:
sgp5ebbrE22.00:
sgp5ebbrE22.b1:
sgp15ebbrE22.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/10/1999 | 2045 | 03/10/1999 | 2100 |
Subject: | SGP/EBBR/E22 - Right Aspirator Fan Replaced |
DataStreams: | sgp15ebbrE22.b1, sgp30ebbrE22.b1 |
Description: | Replacement of the right aspirator fan on the EBBR AEM caused temperature, relative humidity, and vapor pressure data to be incorrect for the 2045 and 2100 GMT 15 minute data and Bowen ratio, sensible heat flux, and latent heat flux to be incorrect for the 2100 GMT data. |
Measurements: | sgp30ebbrE22.b1:
sgp15ebbrE22.b1:
|