DQR ID | Subject | Data Streams Affected |
---|---|---|
D000211.12 | SGP/EBBR - EBBR E20 Thermocouple Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D000228.1 | SGP/EBBR - EBBR E20 Right Air Temperature Incorrect | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D000303.1 | SGP/EBBR - EBBR E20 Left Air Temperature Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D010213.7 | SGP/EBBR/E20 - EBBR E20 Wind Speed Iced | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D010517.2 | SGP EBBR E20 - E20 EBBR Right Air T Incorrect | sgp5ebbrE20.b1, sgp30ebbrE20.b1, sgp15ebbrE20.b1 |
D010517.3 | SGP EBBR E20 - E20 EBBR Right Air T Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D010605.12 | SGP EBBR E20 - E20 EBBR Data Incorrect During STP #3 Replacement | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D010605.13 | SGP EBBR E20 - E20 EBBR Data Incorrect After Program Restart | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D010605.7 | SGP EBBR E20 - E20 EBBR Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D010605.8 | SGP EBBR E20 - E20 EBBR Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D010605.9 | SGP EBBR E20 - E20 EBBR Net Radiation Data Incorrect | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D011127.31 | SGP EBBR E20 - E20 EBBR Data Incorrect During 6 Month Checks | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D020628.18 | SGP/EBBR/E20 - T/RH Check | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D020628.4 | SGP/EBBR/E20 - 3-month Check | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D020716.16 | SGP/EBBR/E20 - 6 Month Checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D020717.40 | SGP/EBBR/E20 - AEM Hung | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D020717.42 | SGP/EBBR/E20 - Battery Voltage Low | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
D020717.43 | SGP/EBBR/E20 - Pressure Almost Constant | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D020717.48 | SGP/EBBR/E20 - Measurements Zero | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
D020717.51 | SGP/EBBR/E20 - Measurements Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
D030110.25 | SGP/EBBR/E20 - Data Incorrect during 6 month checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.10 | SGP/EBBR/E20 - Data Zero following logger restarts | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.13 | SGP/EBBR/E20 - Battery voltage low | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.18 | SGP/EBBR/E20 - AEM Hung between Home Positions | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.2 | SGP/EBBR/E20 - Data incorrect during instrument maintenance | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.3 | SGP/EBBR/E20 - Resistance-based Measurements Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030117.8 | SGP/EBBR/E20 - REPROCESS: Net Rad Coefficients Incorrect | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D030712.21 | SGP/EBBR/E20 - 6 Month Checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D031029.1 | SGP/EBBR/E20 - Fuse Blown in AEM | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D031031.7 | SGP/EBBR/E20 - Water in Net Radiometer, Surface Fluxes Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D031204.19 | SGP/EBBR/E20 - 6 Month Checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D031208.5 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D031211.5 | SGP/EBBR/E20 - Pressure Sensor Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D031222.20 | SGP/EBBR/E20 - Wind Speed Sensor Frozen By Ice Storm | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D040304.19 | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D040304.20 | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D040507.2 | SGP/EBBR/E20 - Left Air Temperature Incorrect | sgp15ebbrE20.b1, sgp30baebbrE20.c1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D040722.1 | SGP/EBBR/E20 - Wind Direction Stuck at 100 Degrees | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D040813.2 | SGP/EBBR/E20 - AEM Failure | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
D041222.16 | SGP/EBBR/E20 - 6 Month Checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D050206.14 | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice Storm | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D050207.10 | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice Storm | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D050404.4 | SGP/EBBR/E20 - Temp. of thum_left Incorrect At Times | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D051112.7 | SGP/EBBR/E20 - metadata corrections | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D060111.13 | SGP/EBBR/E20 - Data Incorrect During J-Panel Replacement | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D060501.22 | SGP/EBBR/E20 - Suspect Measurements | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D060622.6 | SGP/EBBR/E20 - Net Radiation, Fluxes Too Large | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D070716.2 | SGP/EBBR/E20 - Reprocess: Wind Direction 20 Degrees Low | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D071115.1 | SGP/EBBR/E20 - Reprocess: Wind Direction 65 Degrees Low | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D080410.2 | SGP/EBBR/E20 - Wind Direction 50 Degrees High | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D080902.1 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D090313.16 | SGP/EBBR/E20 - Wind Speed Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D090414.1 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D100202.4 | SGP/EBBR/E20 - Wind speed sensor frozen stopped | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D100803.1 | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D100816.1 | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes - a result of low battery voltage. | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D111026.2 | SGP/EBBR/E20 - Sensible and latent heat fluxes overestimated | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D930503.1 | EBBR - soil heat flux plate giving opposite sign | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D940105.2 | SGP/EBBR/E20 - Blown fuse in AEM at E20 | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D940329.2 | SGP/EBBR/E20 - Pressure Sensor Malfunction | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D940921.1 | SGP/EBBR/E20 - Fan Stopped, T and RH Biases | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D941021.7 | SGP/EBBR/E20 - Net Radiometer Hemisphere Changes | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D941021.9 | SGP/EBBR/E20 - Net Radiometer Hemisphere Changes | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D950626.4 | SGP/EBBR/E20 - Frozen Wind Speed Sensor | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D950816.4 | SGP/EBBR/E20 - AEM Home 30 Values Low | sgp5ebbrE20.b1, sgp30ebbrE20.b1 |
D960502.1 | SGP/EBBR/E20 - Temperature/RH Probes Malfunction and Replacement | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.00 |
D960508.8 | SGP/EBBR/E20 - 3-month check | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D961122.26 | SGP/EBBR/E20 - EBBR 3 Month Checks - 10 EFs | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D970330.5 | SGP/EBBR/E20 - Wind Speed Cups Frozen | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D971021.7 | SGP/EBBR/E20 - EBBR Biannual Checks | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
D980117.20 | SGP/EBBR/E20- EBBR Frozen Wind Speed | sgp5ebbrE20.b1, sgp30ebbrE20.b1, sgp15ebbrE20.b1 |
D980117.28 | SGP/EBBR/E20 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
D980410.10 | SGP/EBBR/E20 - Wind Speed Sensor Frozen | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D980416.16 | SGP/EBBR/E20 - 3 Month Check | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D980529.14 | SGP/EBBR/E20 - Six Month Checks | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D980731.2 | SGP/EBBR/E20 - Wind Speed Incorrect | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
D981113.1 | SGP/EBBR/E20 - Incorrect Data - Cattle Vandalism | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D990127.25 | SGP/EBBR/E20 - Wind Direction Data Incorrect (revised) | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D990127.29 | SGP/EBBR/E20 - Wind Direction Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D990127.40 | SGP/EBBR/E20 - Wind Speed Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D990127.41 | SGP/EBBR/E20 - Wind Speed Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
D990129.8 | SGP/EBBR/E20 - Data Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
D990218.2 | SGP/EBBR/E20 - Pressure Low | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
D990415.3 | SGP/EBBR/E20 - Air Temperature Incorrect | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/18/1999 | 1715 | 06/18/1999 | 1745 |
Subject: | SGP/EBBR - EBBR E20 Thermocouple Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Left and right thermocouple air temperature data are incorrect during the replacement of the right thermocouple. Affected data are: 5 minute: tair_bot, tair_top 15 minute: tai_r, tair_l 30 minute: tair_bot, tair_top, e, h, bowen |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/1999 | 0700 | 02/09/2000 | 1715 |
Subject: | SGP/EBBR - EBBR E20 Right Air Temperature Incorrect |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | The right air temperature (thermocouple) output was frequently offscale. Examination of the 15 minute data will clearly show which times are affected during the period. The affected data are: 5 minute: tair_top, tair_bot 15 minute: tair_r 30 minute: tair_top, tair_bot, bowen, h, e |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/23/2000 | 1935 | 02/23/2000 | 2000 |
Subject: | SGP/EBBR - EBBR E20 Left Air Temperature Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Left air temperature (thermocouple) was incorrect during part of the period, thereby affecting top and bottom air temperature. The affected data and times are: 5 minute: tair_top (1935 GMT) 15 minute: tair_l (1945 GMT) 30 minute: tair_top, bowen, e, h (2000 GMT) |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/25/2000 | 1545 | 12/28/2000 | 2145 |
Subject: | SGP/EBBR/E20 - EBBR E20 Wind Speed Iced |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/22/2000 | 0000 | 05/22/2000 | 0000 |
Subject: | SGP EBBR E20 - E20 EBBR Right Air T Incorrect |
DataStreams: | sgp5ebbrE20.b1, sgp30ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | The right air temperature probe was incorrect while connections for it were checked. Bowen ratio, sensible heat flux, and latent heat flux were incorrect as a result. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/2000 | 2345 | 02/21/2001 | 1946 |
Subject: | SGP EBBR E20 - E20 EBBR Right Air T Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The right air temperature probe was incorrect frequently. Inspection of the right air temperature data will quickly show where it went offscale. Bowen ratio, sensible heat flux, and latent heat flux were incorrect as a result. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/15/2000 | 2031 | 11/15/2000 | 2101 |
Subject: | SGP EBBR E20 - E20 EBBR Data Incorrect During STP #3 Replacement |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | All data was incorrect during replacement of soil temperature probe #3. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/2000 | 1831 | 11/29/2000 | 1901 |
Subject: | SGP EBBR E20 - E20 EBBR Data Incorrect After Program Restart |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | All data was incorrect after a datalogger program restart. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/17/2000 | 2001 | 05/17/2000 | 2031 |
Subject: | SGP EBBR E20 - E20 EBBR Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | Data was incorrect right after a datalogger upgrade. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2000 | 1930 | 08/02/2000 | 0331 |
Subject: | SGP EBBR E20 - E20 EBBR Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | The data was incorrect because battery voltage was low. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/04/2000 | 1930 | 10/04/2000 | 1931 |
Subject: | SGP EBBR E20 - E20 EBBR Net Radiation Data Incorrect |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | The net radiation data was incorrect while the top dome was being replaced. Sensible and latent heat fluxes are therefore also incorrect. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/17/2001 | 1500 | 10/17/2001 | 1601 |
04/04/2001 | 1700 | 04/04/2001 | 1736 |
Subject: | SGP EBBR E20 - E20 EBBR Data Incorrect During 6 Month Checks |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The data was incorrect during the 6 month checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/10/1994 | 1520 | 11/10/1994 | 1630 |
Subject: | SGP/EBBR/E20 - T/RH Check |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: 1520, 1525, 1530, 1535, 1540, 1545, 1550, 1555, 1600, 1605 15 minute: 1530, 1545, 1600, 1615 30 minute: 1530, 1600, 1630 (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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/1995 | 1300 | 10/13/1995 | 1600 |
Subject: | SGP/EBBR/E20 - 3-month Check |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2002 | 1910 | 05/01/2002 | 1946 |
Subject: | SGP/EBBR/E20 - 6 Month Checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The indicated measurements were incorrect during the 6 month checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/2001 | 2045 | 01/23/2002 | 1801 |
Subject: | SGP/EBBR/E20 - AEM Hung |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The automatic exchange mechanism frequently hung in one position. The home signals and automated qc in the netcdf data files indicate when this occurred. Bowen ratio, sensible heat flux, and latent heat flux are incorrect for this condition. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/2001 | 0045 | 11/28/2001 | 2031 |
02/06/2002 | 2130 | 02/07/2002 | 0331 |
Subject: | SGP/EBBR/E20 - Battery Voltage Low |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
Description: | When the battery voltage is below 10.5 volts, most of the measurements are suspect. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2001 | 1605 | 11/28/2001 | 2031 |
Subject: | SGP/EBBR/E20 - Pressure Almost Constant |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | During the indicated period the pressure went to an almost constant 102 to 105 kPa. This occurred after the replacement of another sensor. The incorrect pressure values affect the sensible and latent heat flux calculations. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/15/2002 | 1700 | 05/15/2002 | 1701 |
11/14/2001 | 1600 | 11/14/2001 | 1601 |
05/29/2002 | 1830 | 05/29/2002 | 1901 |
11/27/2001 | 1800 | 11/27/2001 | 1801 |
Subject: | SGP/EBBR/E20 - Measurements Zero |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
Description: | Most measurements were zero during the indicated periods. This often happens for the first reported data time after a CR10 datalogger restart. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/27/2001 | 1845 | 12/27/2001 | 1901 |
05/15/2002 | 1715 | 05/15/2002 | 1731 |
Subject: | SGP/EBBR/E20 - Measurements Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.00, sgp5ebbrE20.b1 |
Description: | Many measurements were incorrect because of the lack of an initial 15 minute value to use for gradient or soil change of energy storage calculations. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/26/2002 | 1900 | 11/26/2002 | 1930 |
Subject: | SGP/EBBR/E20 - Data Incorrect during 6 month checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Some of the measurements are incorrect during the 6 month checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2002 | 1830 | 11/13/2002 | 1859 |
12/11/2002 | 1900 | 12/11/2002 | 1929 |
Subject: | SGP/EBBR/E20 - Data Zero following logger restarts |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Most of the measurements were zero, which normally happens after a datalogger restart. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/2002 | 0215 | 10/30/2002 | 2000 |
Subject: | SGP/EBBR/E20 - Battery voltage low |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | When Battery Voltage drops below 10.5 volts, most measurements are suspect and some are often incorrect. The user will need to inspect the data carefully to determine the useability of the data. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/07/2002 | 1630 | 08/07/2002 | 1730 |
Subject: | SGP/EBBR/E20 - AEM Hung between Home Positions |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2002 | 1705 | 08/09/2002 | 1730 |
Subject: | SGP/EBBR/E20 - Data incorrect during instrument maintenance |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Most of the data was incorrect just after the EBBR unit was replaced. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/20/2002 | 1300 | 10/20/2002 | 1500 |
Subject: | SGP/EBBR/E20 - Resistance-based Measurements Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | When the Reference Temperature in the EBBR enclosure is not reported correctly, it affects all resistance-based measurements that are adjusted with the temperature of the reference junction. No work-around is possible for this situation. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2002 | 1730 | 12/11/2002 | 1930 |
Subject: | SGP/EBBR/E20 - REPROCESS: Net Rad Coefficients Incorrect |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The Net Radiometer coefficients were incorrect in the CR10 program when the replacement EBBR unit was installed on 08/09/02. The data can be easily corrected; see the Suggestion area below. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2003 | 1950 | 04/16/2003 | 2045 |
Subject: | SGP/EBBR/E20 - 6 Month Checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2003 | 2100 | 10/29/2003 | 2300 |
Subject: | SGP/EBBR/E20 - Fuse Blown in AEM |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | When the EBBR system restarted on 15 Oct. 2003, the AEM malfunctioned. Surface fluxes data during this period are incorrect. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2003 | 0000 | 10/01/2003 | 2100 |
Subject: | SGP/EBBR/E20 - Water in Net Radiometer, Surface Fluxes Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/29/2003 | 2200 | 10/29/2003 | 2245 |
Subject: | SGP/EBBR/E20 - 6 Month Checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/2003 | 0530 | 12/23/2003 | 2140 |
Subject: | SGP/EBBR/E20 - Wind Direction Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Wind direction is incorrect, reading at or about 0 or 15 to 25 degrees. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/2003 | 1430 | 01/21/2004 | 2130 |
Subject: | SGP/EBBR/E20 - Pressure Sensor Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The E20 pressure sensor suffered from spikes in pressure, which were related to increases in voltage during the day as the solar panels charged the battery. These spikes were not of a magnitude that would affect the 30 minute surface fluxes. Replacement of the pressure sensor solved the problem. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/2003 | 1100 | 12/13/2003 | 1230 |
Subject: | SGP/EBBR/E20 - Wind Speed Sensor Frozen By Ice Storm |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0505 | 02/02/2004 | 1845 |
Subject: | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 0535 | 02/02/2004 | 1755 |
Subject: | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2004 | 0000 | 03/31/2004 | 2355 |
Subject: | SGP/EBBR/E20 - Left Air Temperature Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30baebbrE20.c1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The left air temperature, and therefore top and bottom air temperatures were offscale or incorrect on occasion. Bowen ratio, sensible heat flux, and latent heat flux were also incorrect during those times. Inspection of the data is required to detect the incorrect periods. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30baebbrE20.c1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2004 | 1745 | 08/04/2004 | 1915 |
Subject: | SGP/EBBR/E20 - Wind Direction Stuck at 100 Degrees |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind direction sensor was stuck at about 100 degrees. This did not affect the primary measurements (net radiation, soil heat flow, sensible heat flux, latent heat flux). |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/03/2004 | 0300 | 09/15/2004 | 2000 |
09/24/2004 | 0700 | 09/29/2004 | 1800 |
Subject: | SGP/EBBR/E20 - AEM Failure |
DataStreams: | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
Description: | The AEM hung inbetween positions; home signals were zero. The AEM fuse kept blowing, most likely because of worn rails or sleeves. This condition may reoccur. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2004 | 1730 | 09/29/2004 | 1800 |
Subject: | SGP/EBBR/E20 - 6 Month Checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 1420 | 01/07/2005 | 1650 |
Subject: | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/2005 | 0150 | 01/07/2005 | 1425 |
Subject: | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice Storm |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/20/2005 | 1230 | 04/27/2005 | 2000 |
Subject: | SGP/EBBR/E20 - Temp. of thum_left Incorrect At Times |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | 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. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2003 | 0000 | 07/22/2005 | 2359 |
Subject: | SGP/EBBR/E20 - metadata corrections |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | 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") |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/2005 | 0930 | 12/21/2005 | 1730 |
Subject: | SGP/EBBR/E20 - Data Incorrect During J-Panel Replacement |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Much of the data was incorrect during replacement of J-Panel #1. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/22/2006 | 0300 | 02/25/2006 | 1630 |
Subject: | SGP/EBBR/E20 - Suspect Measurements |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Some measurements may be incorrect because of low supply voltage. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2006 | 0900 | 06/20/2006 | 1915 |
Subject: | SGP/EBBR/E20 - Net Radiation, Fluxes Too Large |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | 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. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2007 | 1500 | 09/12/2007 | 2045 |
Subject: | SGP/EBBR/E20 - Reprocess: Wind Direction 20 Degrees Low |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The EBBR wind direction was found to be misaligned 20 degrees low. This bias should have had no effect on the res_ws or sigma_wd measurements. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2007 | 0000 | 10/24/2007 | 1900 |
Subject: | SGP/EBBR/E20 - Reprocess: Wind Direction 65 Degrees Low |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind direction sensor reported wind directions that were 65 degrees too low because of a mis-alignment. This bias should have no effect on the res_ws or sigma_wd measurements. The wind direction data could be re-processed by adding 65 degrees. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/08/2008 | 0600 | 05/07/2008 | 2000 |
Subject: | SGP/EBBR/E20 - Wind Direction 50 Degrees High |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind direction was offset high about 50 degrees. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/15/2008 | 0230 | 09/10/2008 | 2230 |
Subject: | SGP/EBBR/E20 - Wind Direction Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind direction differed from the co-located SMOS by 50 deg during part of the stated period and the electronics had failed completely resulting in a constant 135 degrees for the following dates and times: 08/15 0230-0430, 0830-1530 and 09/03 0200-0300, 0500 - 09/10 2230. Sensible and latent heat fluxes were not affected by this problem. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2009 | 1910 | 01/27/2009 | 0800 |
Subject: | SGP/EBBR/E20 - Wind Speed Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2009 | 0305 | 04/22/2009 | 1400 |
Subject: | SGP/EBBR/E20 - Wind Direction Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind direction measurement was stuck at 40 degrees. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/28/2010 | 2030 | 02/01/2010 | 1930 |
Subject: | SGP/EBBR/E20 - Wind speed sensor frozen stopped |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/08/2010 | 0730 | 07/29/2010 | 1100 |
Subject: | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Because of a periodic AEM failure, home signal 30 was often stuck at the home signal 15 position. These occurrences resulted in incorrect latent and sensible heat flux values at times. Some missing data occurred because of low battery voltage (the CR10 program stops running when battery voltage is insufficient. The data outage events were preceded and followed by several hours of bad/suspicious data. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2010 | 1030 | 08/04/2010 | 0200 |
Subject: | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes - a result of low battery |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Supply voltage sometimes dropped too low at night, causing incorrect measurements of sensible and latent heat fluxes, pressure, AEM home signal, and soil heat flow. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2011 | 1200 | 08/24/2011 | 1930 |
Subject: | SGP/EBBR/E20 - Sensible and latent heat fluxes overestimated |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Net Radiation was too large resulting in overestimated sensible heat and latent heat fluxes. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/1993 | 0631 | 07/06/1993 | 0632 |
Subject: | EBBR - soil heat flux plate giving opposite sign |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | EDITOR'S NOTE: This DQR refers to data collected by the EBBR at E20 prior to the begin date of regular ARM data. At that time, the data streams which contain the EBBR.E20 data were named Dsgp15ebbr6.a0 Dsgp30ebbr6.a1 Dsgp5ebbr6.a0 These data are not readily available from the ARM archive, but can be made available by special request. The actual time range of the problem described here is 930405.0000-930429.2359. Soil heat flux sensor #3 of EBBR6, at Meeker, Ok extended site was determined by me to have one heat flux plate whose output was out of phase with the other four. The absolute value of the soil heat flux value produced by the plate was good. Normally, this condition is caused either by improper wiring of the sensor into the data acquisition system (this was checked by site operations personnel on 29 April; wiring convention was correct) or by the plate being installed upside down. The latter seems fairly obvious, although the plate was not dug up to check it's orientation; that is not neccesary and would be detrimental since it takes time for such sensors to acclimate themselves to their soil environment. The consequence of this problem is that 5 soil heat flux plate outputs were being averaged, with one of the outputs being of opposite sign from the other four. Since the outputs are similar, in absolute terms, this essentially resulted in an average soil heat flux plate value that is 40% too low. In terms of output, this a reduction of around 10 W per meters squared, or 1-2% of the RN+G term during maximum solar insolation. This is clearly a small error. Site operations personnel switched the soil heat flux plate leads to give the proper sign of output, on 29 April 1993, time unknown (this can be determined from looking at the ingested data later; it hasn't been ingested yet). The instrument operated properly at that point. Thus, the problem has been corrected. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/1993 | 1300 | 11/12/1993 | 1600 |
Subject: | SGP/EBBR/E20 - Blown fuse in AEM at E20 |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | On October 30, 1993, before 1300 GMT, the fuse in the AEM (Automatic Exchange Mechanism) of Meeker, Ok (E20) EBBR blew out. The AEM remained nonfunctional until the fuse was replaced just before 1600 GMT on November 12, 1993. This situation resulted in the following invalid data: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot, home 15 minute: rr_thum_r, rr_thum_l, mv_hum_r, mv_hum_l, mv_home, 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, home_15, home_30 If the biases of the sensors were know, bowen, h, and e could be recalculated from the 15 minute and/or 5 minute data. Since we will not have any idea of what those biases are until an annual calibration of the sensors can take place (which may be months away), the recalculations cannot be performed at this time. Furthermore, it may be invalid to use sensor biases, if determined too far removed in time, due to the gradual calibration drift of some of the sensors. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/17/1994 | 1600 | 03/17/1994 | 1630 |
Subject: | SGP/EBBR/E20 - Pressure Sensor Malfunction |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Pressure sensor malfunction during attempt to monitor it during Preventative Maintenance visit. 30 minute values of pressure for 1600 GMT and 1630 GMT, 15 minute values for 1600, 1615, and 1630, and 5 minute values for 1600, 1605, 1610, 1615, 1620, 1625, and 1630 GMT are incorrect. However, the range of the incorrect values was such as to not adversely affect flux measurements. Some noise was apparently induced in the pressure output voltage as a result of the monitoring, although it is not known how. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/12/1994 | 1300 | 09/14/1994 | 1847 |
Subject: | SGP/EBBR/E20 - Fan Stopped, T and RH Biases |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Another fan stoppage situation occurred. This is the fourth one in the last few months and may indicate a weakening of the fans that aspirate the temperature, relative humidity housings. The 15 minute data reveals that the stoppage occurred at approximately 1300 GMT on September 12. The left fan was cleaned out by site operations personnel and began running again at 1847 GMT on September 14. The 15 minute data during this period shows that during daytime, the left temperature was greater than the right temperature and that the left relative humidity was lower than the right relative humidity (a consequence of greater temperature), irregardless of the positions of the housings. The bowen ratio, sensible heat flux and latent heat flux for this period, as well as all left housing temperatures and relative humidities are incorrect. The data values that are incorrect are: 5 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, hum_bot, vp_top, vp_bot 15 minute: rr_thum_l, mv_hum_l, tair_l, 30 minute: tair_top, tair_bot, thum_top, thum_bot, hum_top, thum_bot, vp_top, vp_bot, bowen, e, h Because of the increased frequency of fan stoppage occurrences, I have submitted a work request to site operations to use the portable vane anemometer to check the flow of the housing fans on each EBBR and visually check (and clean if needed) the fans for debris that would restrict the flow. Included in this work request are instructions for checking the performance of the temperature and relative humidity sensors by manually putting the aspirator housings at the same height for a half hour period (so that two 15 minute and one half hour comparison result). The latter part of the work request is prompted by my close inspection of the Meeker data for the last few weeks. It is clear that significant biases have developed in the pairs of temperature and relative humidity sensors; left thermocouple ~0.5 deg. C greater than right thermocouple, left relative humidity ~5% lower than right relative humidity. Biases were expected in operating the systems over long time periods, and these appear to be the result of simple offsets, not changes in calibrations. At this point, I just want to determine how large the offsets are. Comparison of these offsets between EBBR units, in light of the different lengths of time that EBBR units and individual sensors have been deployed, may provide some interesting information on likely offset changes with time. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/1994 | 1715 | 09/29/1994 | 1800 |
Subject: | SGP/EBBR/E20 - Net Radiometer Hemisphere Changes |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Incorrect data during hemisphere change. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/14/1994 | 1600 | 09/29/1994 | 1735 |
Subject: | SGP/EBBR/E20 - Net Radiometer Hemisphere Changes |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/1995 | 0555 | 03/07/1995 | 2145 |
Subject: | SGP/EBBR/E20 - Frozen Wind Speed Sensor |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | On March 7, 1995 freezing rain stopped the cups of the EBBR wind speed instrument at Meeker, OK (E20). All 5, 15, and 30 minute data values indicated below are incorrect for the period listed above. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/1995 | 2030 | 08/16/1995 | 2359 |
Subject: | SGP/EBBR/E20 - AEM Home 30 Values Low |
DataStreams: | sgp5ebbrE20.b1, sgp30ebbrE20.b1 |
Description: | The first EBBR to achieve annual calibration changeout was Meeker, Ok, E20. However, soon after changeout on August 9, 1995, the home 30 value dropped below 15, intermittently, to typically 0.3 to 0.5; this causes a data quality message to be output in the site operations log as the stated acceptable range for home 30 is 15 to 34.999999. However, no data is incorrect as a result of this condition. No replacement AEM is available, as the changeout kit AEMs are somewhat different from the initial units. Site operations hopes to have time to diagnose the problem on the next PM visit and correct the problem. At present, data quality is not jeopardized. I will submit another DQR or addendum when successful replacement of the AEM is accomplished. |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/01/1995 | 0000 | 05/08/1996 | 1755 |
Subject: | SGP/EBBR/E20 - Temperature/RH Probes Malfunction and Replacement |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.00 |
Description: | Beginning on approximately October 1, 1996 the calibration of the temperature sensor in one or both T/RH probes began to drift; temperatures started to drift higher than the thermocouple probes. This drift caused the upper and lower temperatures measured by the T/RH probe to be 2 to 10 degrees C greater than the thermocouple probes. Comparison with adjacent EBBR sites shows that the thermocouples were measuring properly. The problem affected the vapor pressure outputs primarily, making them as much as 1 kPa greater than they should be (vapor pressure is calculated from probe temperature and relative humidity). The effect on sensible and latent heat fluxes was negligible, although latent heat flux may be overestimated by about 5% presently and sensible heat flux underestimated by approximately the same percentage. Site operations replaced the T/RH probes on 8 May 1996; the new probes are performing well. The serial numbers of replaced probes are: Left 632415, Right 632356. New probe serial numbers are: Left 460428, Right 460412. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/10/1996 | 1500 | 04/10/1996 | 1830 |
Subject: | SGP/EBBR/E20 - 3-month check |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.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 above; data times affected do not include the beginning time and do include the ending time (data files are denoted by the end time). |
Measurements: | sgp5ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/1996 | 1730 | 10/23/1996 | 1755 |
Subject: | SGP/EBBR/E20 - EBBR 3 Month Checks - 10 EFs |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/24/1996 | 1010 | 11/25/1996 | 1805 |
Subject: | SGP/EBBR/E20 - Wind Speed Cups Frozen |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | Freezing rain, snow, and below freezing conditions during 24 November 1996 caused the wind speed sensor cups to freeze in a stopped state at E20, Meeker, OK. On 25 November, the cups broke free of the ice and 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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/09/1997 | 2120 | 04/09/1997 | 2144 |
Subject: | SGP/EBBR/E20 - EBBR Biannual Checks |
DataStreams: | sgp30ebbrE20.b1, sgp15ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1998 | 0330 | 01/08/1998 | 1940 |
Subject: | SGP/EBBR/E20- EBBR Frozen Wind Speed |
DataStreams: | sgp5ebbrE20.b1, sgp30ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | Wind speed cups were frozen during the indicated time periods. All 5, 15, and 30 minute data values indicated are incorrect for the periods listed. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1998 | 1100 | 01/14/1998 | 1545 |
Subject: | SGP/EBBR/E20 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) |
DataStreams: | sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp15ebbrE20.b1 |
Description: | The EBBR AEM stopped exchanging because of icing at during this time period. The calculations of Bowen ratio, latent heat flux, and sensible heat flux are incorrect for the time period indicated. The other measurements listed are also incorrect for those times: Note: Mentor supplied the end date/time to this DQR after submission. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/13/1998 | 0330 | 01/15/1998 | 1630 |
Subject: | SGP/EBBR/E20 - Wind Speed Sensor Frozen |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | The wind speed sensor was frozen during the period. Data values that were incorrect are: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/22/1997 | 1645 | 10/22/1997 | 1705 |
Subject: | SGP/EBBR/E20 - 3 Month Check |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/1998 | 1450 | 05/20/1998 | 1530 |
Subject: | SGP/EBBR/E20 - Six Month Checks |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.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 above. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/03/1998 | 1115 | 07/15/1998 | 1930 |
Subject: | SGP/EBBR/E20 - Wind Speed Incorrect |
DataStreams: | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
Description: | On 3 July 1998 the cup anemometer lost a cup. Until the cup assembly was replaced by site ops personnel on 15 July 1998, wind speed and vector averaged wind speed data were incorrect. The values affected are listed below. 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/19/1998 | 2215 | 10/21/1998 | 1600 |
Subject: | SGP/EBBR/E20 - Incorrect Data - Cattle Vandalism |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Cattle penetrated the electric fence and pulled the aspirator housings from the AEM. Thus T/RH/VP and sensible and latent heat fluxes are incorrect for the period (until 1540 GMT; LE and H through the 30 minute period ending at 1600 GMT) |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/1998 | 1435 | 12/23/1998 | 0200 |
Subject: | SGP/EBBR/E20 - Wind Direction Data Incorrect (revised) |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1999 | 1005 | 01/08/1999 | 1730 |
Subject: | SGP/EBBR/E20 - Wind Direction Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
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: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/1999 | 0545 | 01/09/1999 | 2200 |
Subject: | SGP/EBBR/E20 - Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws, |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/21/1998 | 0735 | 12/21/1998 | 2000 |
Subject: | SGP/EBBR/E20 - Wind Speed Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | The wind speed sensor was iced stopped by freezing rain, resulting in the following values being incorrect: 5 minute: wind_s, res_ws 15 minute: wind_s 30 minute: wind_s, res_ws, |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/25/1998 | 1735 | 12/29/1998 | 1630 |
Subject: | SGP/EBBR/E20 - Data Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1, sgp5ebbrE20.00 |
Description: | Version 6 of the CR10 program was installed during this period instead of version 7 (the initial version 7 program did not work). The calibrations and coefficients in version 6 were incorrect; therefore all data during this period is of questionable quality and e and h are clearly incorrect. The correct version 7 program was installed on 29 Dec 1998. |
Measurements: | sgp5ebbrE20.b1:
sgp5ebbrE20.00:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/13/1999 | 2150 | 02/10/1999 | 1640 |
Subject: | SGP/EBBR/E20 - Pressure Low |
DataStreams: | sgp5ebbrE20.b1, sgp15ebbrE20.b1, sgp30ebbrE20.b1 |
Description: | The pressure sensor values dropped several kPa on 13 January 1999 because of a sensor malfunction and remained that way until the sensor was replaced on 10 February 1999. Comparison of the pressure before and after the problem period shows that Bowen ratio was underestimated by approximately 6% during the period, resulting in a 6% overestimation of latent heat flux and a 6% underestimation of sensible heat flux. Adjustment of the flux data during the period by these amounts should be made by the data user. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/25/1999 | 0040 | 04/07/1999 | 1745 |
Subject: | SGP/EBBR/E20 - Air Temperature Incorrect |
DataStreams: | sgp15ebbrE20.b1, sgp30ebbrE20.b1, sgp5ebbrE20.b1 |
Description: | Right air temperature (15 minute) and top and bottom air temperatures (5 and 30 minute) during this period are incorrect because the right air temperature sensor was not working. |
Measurements: | sgp5ebbrE20.b1:
sgp15ebbrE20.b1:
sgp30ebbrE20.b1:
|