DQR ID | Subject | Data Streams Affected |
---|---|---|
D000211.10 | SGP/EBBR - EBBR E20 Data Incorrect from SHF #5 | sgp30ebbrE20.b1 |
D000211.12 | SGP/EBBR - EBBR E20 Thermocouple Data Incorrect | sgp30ebbrE20.b1 |
D000228.1 | SGP/EBBR - EBBR E20 Right Air Temperature Incorrect | sgp30ebbrE20.b1 |
D000303.1 | SGP/EBBR - EBBR E20 Left Air Temperature Incorrect | sgp30ebbrE20.b1 |
D010213.7 | SGP/EBBR/E20 - EBBR E20 Wind Speed Iced | sgp30ebbrE20.b1 |
D010517.1 | SGP EBBR E20 - E20 EBBR Soil Heat Flow #3 Incorrect | sgp30ebbrE20.b1 |
D010517.2 | SGP EBBR E20 - E20 EBBR Right Air T Incorrect | sgp30ebbrE20.b1 |
D010517.3 | SGP EBBR E20 - E20 EBBR Right Air T Incorrect | sgp30ebbrE20.b1 |
D010605.11 | SGP EBBR E20 - E20 EBBR Soil Temperatures Incorrect | sgp30ebbrE20.b1 |
D010605.12 | SGP EBBR E20 - E20 EBBR Data Incorrect During STP #3 Replacement | sgp30ebbrE20.b1 |
D010605.13 | SGP EBBR E20 - E20 EBBR Data Incorrect After Program Restart | sgp30ebbrE20.b1 |
D010605.14 | SGP EBBR E20 - E20 EBBR Some Data Incorrect | sgp30ebbrE20.b1 |
D010605.7 | SGP EBBR E20 - E20 EBBR Data Incorrect | sgp30ebbrE20.b1 |
D010605.8 | SGP EBBR E20 - E20 EBBR Data Incorrect | sgp30ebbrE20.b1 |
D010605.9 | SGP EBBR E20 - E20 EBBR Net Radiation Data Incorrect | sgp30ebbrE20.b1 |
D011127.31 | SGP EBBR E20 - E20 EBBR Data Incorrect During 6 Month Checks | sgp30ebbrE20.b1 |
D011127.4 | SGP EBBR E20 - E20 EBBR Soil Temperature #3 Incorrect | sgp30ebbrE20.b1 |
D011218.10 | SGP EBBR E20 - E20 EBBR Soil Heat Flow #2 Incorrect | sgp30ebbrE20.b1 |
D011218.11 | SGP EBBR E20 - E20 EBBR Battery Voltage Low, Incorrect Data | sgp30ebbrE20.b1 |
D011218.13 | SGP EBBR E20 - E20 EBBR Battery Voltage Low, Data Incorrect | sgp30ebbrE20.b1 |
D011218.14 | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect | sgp30ebbrE20.b1 |
D011218.9 | SGP EBBR E20 - E20 EBBR Soil Heat Flow #4 Incorrect | sgp30ebbrE20.b1 |
D020628.4 | SGP/EBBR/E20 - 3-month Check | sgp30ebbrE20.b1 |
D020716.16 | SGP/EBBR/E20 - 6 Month Checks | sgp30ebbrE20.b1 |
D020717.40 | SGP/EBBR/E20 - AEM Hung | sgp30ebbrE20.b1 |
D020717.42 | SGP/EBBR/E20 - Battery Voltage Low | sgp30ebbrE20.b1 |
D020717.43 | SGP/EBBR/E20 - Pressure Almost Constant | sgp30ebbrE20.b1 |
D020717.45 | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #3 Incorrect During Sensor Changeout | sgp30ebbrE20.b1 |
D020717.46 | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 Has a Negative Offset | sgp30ebbrE20.b1 |
D020717.47 | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #4 Incorrect | sgp30ebbrE20.b1 |
D020717.48 | SGP/EBBR/E20 - Measurements Zero | sgp30ebbrE20.b1 |
D020717.49 | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect | sgp30ebbrE20.b1 |
D020717.50 | SGP/EBBR/E20 - Measurements Incorrect During Sensor Changeout | sgp30ebbrE20.b1 |
D020717.51 | SGP/EBBR/E20 - Measurements Incorrect | sgp30ebbrE20.b1 |
D020726.1 | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 and #4 incorrect | sgp30ebbrE20.b1 |
D021113.1 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE20.b1 |
D021113.4 | SGP/EBBR - Incorrect Units for Soil Heat Capacity (cs1, cs2, cs3, cs4, cs5) in 30EBBR Header | sgp30ebbrE20.b1 |
D030110.25 | SGP/EBBR/E20 - Data Incorrect during 6 month checks | sgp30ebbrE20.b1 |
D030117.10 | SGP/EBBR/E20 - Data Zero following logger restarts | sgp30ebbrE20.b1 |
D030117.11 | SGP/EBBR/E20 - Reprocess: Soil Temperature #2 Incorrect | sgp30ebbrE20.b1 |
D030117.12 | SGP/EBBR/E20 - Change of Energy Storage Incorrect | sgp30ebbrE20.b1 |
D030117.13 | SGP/EBBR/E20 - Battery voltage low | sgp30ebbrE20.b1 |
D030117.14 | SGP/EBBR/E20 - Wind speed and direction frozen | sgp30ebbrE20.b1 |
D030117.18 | SGP/EBBR/E20 - AEM Hung between Home Positions | sgp30ebbrE20.b1 |
D030117.19 | SGP/EBBR/E20 - Reprocess: Heat Flow #3 and #5 Incorrect | sgp30ebbrE20.b1 |
D030117.2 | SGP/EBBR/E20 - Data incorrect during instrument maintenance | sgp30ebbrE20.b1 |
D030117.20 | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #5 Incorrect | sgp30ebbrE20.b1 |
D030117.22 | SGP/EBBR/E20 - Reprocess: Soil Temperature #1 Incorrect | sgp30ebbrE20.b1 |
D030117.25 | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect | sgp30ebbrE20.b1 |
D030117.3 | SGP/EBBR/E20 - Resistance-based Measurements Incorrect | sgp30ebbrE20.b1 |
D030117.8 | SGP/EBBR/E20 - Reprocess: Net Rad Coefficients Incorrect | sgp30ebbrE20.b1 |
D030121.1 | SGP/EBBR/E20 - Reprocess: Soil Temperature #1 and Soil Heat Flow #5 Incorrect | sgp30ebbrE20.b1 |
D030711.10 | SGP/EBBR/E20 - RHtop Zero | sgp30ebbrE20.b1 |
D030711.8 | SGP/EBBR/E20 - Soil Heat Flow#5 Incorrect | sgp30ebbrE20.b1 |
D030711.9 | SGP/EBBR/E20 - Soil Storage Incorrect After Startup | sgp30ebbrE20.b1 |
D030712.21 | SGP/EBBR/E20 - 6 Month Checks | sgp30ebbrE20.b1 |
D031029.1 | SGP/EBBR/E20 - Fuse Blown in AEM | sgp30ebbrE20.b1 |
D031029.2 | SGP/EBBR/E20 - Reprocess: Soil Temperature Probe #1 Measurements Spiked | sgp30ebbrE20.b1 |
D031031.7 | SGP/EBBR/E20 - Water in Net Radiometer, Surface Fluxes Incorrect | sgp30ebbrE20.b1 |
D031204.19 | SGP/EBBR/E20 - 6 Month Checks | sgp30ebbrE20.b1 |
D031208.5 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp30ebbrE20.b1 |
D031211.5 | SGP/EBBR/E20 - Pressure Sensor Data Incorrect | sgp30ebbrE20.b1 |
D031222.20 | SGP/EBBR/E20 - Wind Speed Sensor Frozen By Ice Storm | sgp30ebbrE20.b1 |
D040304.19 | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice | sgp30ebbrE20.b1 |
D040304.20 | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice | sgp30ebbrE20.b1 |
D040507.2 | SGP/EBBR/E20 - Left Air Temperature Incorrect | sgp30ebbrE20.b1 |
D040722.1 | SGP/EBBR/E20 - Wind Direction Stuck at 100 Degrees | sgp30ebbrE20.b1 |
D040813.2 | SGP/EBBR/E20 - AEM Failure | sgp30ebbrE20.b1 |
D040915.7 | SGP/EBBR/E20 - Soil Heat Flow #3 and Soil Temperature #3 Incorrect | sgp30ebbrE20.b1 |
D041006.3 | SGP/EBBR/E20 - All Soil Measurements Incorrect | sgp30ebbrE20.b1 |
D041222.16 | SGP/EBBR/E20 - 6 Month Checks | sgp30ebbrE20.b1 |
D041222.3 | SGP/EBBR/E20 - Soil Moisture #4 and Soil Temperature #4 Incorrect | sgp30ebbrE20.b1 |
D041223.1 | SGP/EBBR/E20 - Soil Heat Flow #4 Incorrect | sgp30ebbrE20.b1 |
D050206.14 | SGP/EBBR/E20 - Wind Speed Frozen Stopped By Ice Storm | sgp30ebbrE20.b1 |
D050207.10 | SGP/EBBR/E20 - Wind Direction Frozen Stopped By Ice Storm | sgp30ebbrE20.b1 |
D050404.1 | SGP/EBBR/E20 - Wrong Datalogger Program Installed | sgp30ebbrE20.b1 |
D050404.4 | SGP/EBBR/E20 - Temp. of thum_left Incorrect At Times | sgp30ebbrE20.b1 |
D050719.13 | SGP/EBBR/E20 - Improved EBBR CR10 Program | sgp30ebbrE20.b1 |
D050922.2 | SGP/EBBR/E20 - Soil Temperature and Soil Moisture #4 Measurements Incorrect | sgp30ebbrE20.b1 |
D051106.28 | SGP/EBBR/E20 - Average Soil Heat Flux Incorrect | sgp30ebbrE20.b1 |
D051112.7 | SGP/EBBR/E20 - metadata corrections | sgp30ebbrE20.b1 |
D060111.13 | SGP/EBBR/E20 - Data Incorrect During J-Panel Replacement | sgp30ebbrE20.b1 |
D060501.22 | SGP/EBBR/E20 - Suspect Measurements | sgp30ebbrE20.b1 |
D060622.6 | SGP/EBBR/E20 - Net Radiation, Fluxes Too Large | sgp30ebbrE20.b1 |
D070716.2 | SGP/EBBR/E20 - Reprocessing Notice (RID 449) | sgp30ebbrE20.b1 |
D071115.1 | SGP/EBBR/E20 - Reprocessing Notice (RID 453) | sgp30ebbrE20.b1 |
D080410.2 | SGP/EBBR/E20 - Wind Direction 50 Degrees High | sgp30ebbrE20.b1 |
D080902.1 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp30ebbrE20.b1 |
D090313.16 | SGP/EBBR/E20 - Wind Speed Incorrect | sgp30ebbrE20.b1 |
D090414.1 | SGP/EBBR/E20 - Wind Direction Incorrect | sgp30ebbrE20.b1 |
D100202.4 | SGP/EBBR/E20 - Wind speed sensor frozen stopped | sgp30ebbrE20.b1 |
D100803.1 | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes | sgp30ebbrE20.b1 |
D100816.1 | SGP/EBBR/E20 - Incorrect Sensible and Latent Heat Fluxes - a result of low battery voltage. | sgp30ebbrE20.b1 |
D111026.2 | SGP/EBBR/E20 - Sensible and latent heat fluxes overestimated | sgp30ebbrE20.b1 |
D950803.2 | SGP/EBBR/E20 - Reprocess: Soil Temperature Malfunction | sgp30ebbrE20.b1 |
D950815.3 | SGP/EBBR/E20 - Annual Calibration Changeout | sgp30ebbrE20.b1 |
D950816.4 | SGP/EBBR/E20 - AEM Home 30 Values Low | sgp30ebbrE20.b1 |
D951116.2 | SGP/EBBR/E20 - Soil Heat Flow Zero Under Unchanging Conditions | sgp30ebbrE20.b1 |
D951116.6 | SGP/EBBR/E20 - AEM Exchange Stopped in Snow and Freezing Rain | sgp30ebbrE20.b1 |
D960502.1 | SGP/EBBR/E20 - Temperature/RH Probes Malfunction and Replacement | sgp30ebbrE20.b1 |
D960508.8 | SGP/EBBR/E20 - 3-month check | sgp30ebbrE20.b1 |
D961122.17 | SGP/EBBR/E20 - Incorrect Data from Left Humidity Probe | sgp30ebbrE20.b1 |
D961122.26 | SGP/EBBR/E20 - EBBR 3 Month Checks - 10 EFs | sgp30ebbrE20.b1 |
D970330.5 | SGP/EBBR/E20 - Wind Speed Cups Frozen | sgp30ebbrE20.b1 |
D970729.1 | SGP/EBBR/E20 - Reprocess: E20 Soil Probes #3 Cables Cut | sgp30ebbrE20.b1 |
D971021.7 | SGP/EBBR/E20 - EBBR Biannual Checks | sgp30ebbrE20.b1 |
D980117.20 | SGP/EBBR/E20- EBBR Frozen Wind Speed | sgp30ebbrE20.b1 |
D980117.28 | SGP/EBBR/E20 - EBBR AEMs Not Exchanging (Iced Or Fuse Blown) | sgp30ebbrE20.b1 |
D980410.10 | SGP/EBBR/E20 - Wind Speed Sensor Frozen | sgp30ebbrE20.b1 |
D980416.16 | SGP/EBBR/E20 - 3 Month Check | sgp30ebbrE20.b1 |
D980529.14 | SGP/EBBR/E20 - Six Month Checks | sgp30ebbrE20.b1 |
D980731.2 | SGP/EBBR/E20 - Wind Speed Incorrect | sgp30ebbrE20.b1 |
D981113.1 | SGP/EBBR/E20 - Incorrect Data - Cattle Vandalism | sgp30ebbrE20.b1 |
D990127.25 | SGP/EBBR/E20 - Wind Direction Data Incorrect (revised) | sgp30ebbrE20.b1 |
D990127.29 | SGP/EBBR/E20 - Wind Direction Data Incorrect | sgp30ebbrE20.b1 |
D990127.40 | SGP/EBBR/E20 - Wind Speed Data Incorrect | sgp30ebbrE20.b1 |
D990127.41 | SGP/EBBR/E20 - Wind Speed Data Incorrect | sgp30ebbrE20.b1 |
D990129.8 | SGP/EBBR/E20 - Data Incorrect | sgp30ebbrE20.b1 |
D990218.2 | SGP/EBBR/E20 - Pressure Low | sgp30ebbrE20.b1 |
D990415.3 | SGP/EBBR/E20 - Air Temperature Incorrect | sgp30ebbrE20.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/1999 | 1800 | 04/21/1999 | 1730 |
Subject: | SGP/EBBR - EBBR E20 Data Incorrect from SHF #5 |
DataStreams: | sgp30ebbrE20.b1 |
Description: | something, since the problem began during J-panel changeout the 4/7/99 PM. At the 7/21/99 PM, the reference temperature was repaired and reseated. At that time the SHF #5 data became correct again; the two events are probably related only in that other connections, including that of the SHF #5, were probably reseated at the same time. The report of the PM activity is not detailed enough to determine the exact causes and fixes. The incorrect SHF #5 data can be identified by it being an order of magnitude larger than the values from the other soil heat flow sensors. Affected data are: 5 minute: none 15 minute: mv_hft5 30 minute: shf5, c_shf5, g5, ave_shf, e, h |
Measurements: | sgp30ebbrE20.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: | sgp30ebbrE20.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: | 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 |
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: | 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: | sgp30ebbrE20.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: | 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 |
Description: | The anemometer was frozen stopped by freezing rain. Indicated data is incorrect. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2000 | 2000 | 03/06/2000 | 1901 |
03/06/2000 | 1930 | 03/06/2000 | 2031 |
Subject: | SGP EBBR E20 - E20 EBBR Soil Heat Flow #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Heat Flow #3 was incorrect during the indicated periods. Average soil heat flux, latent heat flux, and sensible heat flux were therefore also incorrect. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2000 | 1930 | 11/01/2000 | 1931 |
Subject: | SGP EBBR E20 - E20 EBBR Soil Temperatures Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | All soil temperatures were incorrect for the indicated period. Latent and sensible heat fluxes were therefore incorrect also. |
Measurements: | 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 |
Description: | All data was incorrect during replacement of soil temperature probe #3. |
Measurements: | 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 |
Description: | All data was incorrect after a datalogger program restart. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/2000 | 1930 | 11/29/2000 | 1931 |
Subject: | SGP EBBR E20 - E20 EBBR Some Data Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Quantities requiring a starting value were incorrect; sensible and latent heat fluxes were therefore incorrect also. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Data was incorrect right after a datalogger upgrade. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | The data was incorrect because battery voltage was low. |
Measurements: | 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 |
Description: | The net radiation data was incorrect while the top dome was being replaced. Sensible and latent heat fluxes are therefore also incorrect. |
Measurements: | 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 |
Description: | The data was incorrect during the 6 month checks. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2000 | 2300 | 11/15/2000 | 2031 |
Subject: | SGP EBBR E20 - E20 EBBR Soil Temperature #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The indicated measurements were incorrect while soil temperature probe #3 was not working. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/2001 | 2000 | 03/07/2001 | 1901 |
Subject: | SGP EBBR E20 - E20 EBBR Soil Heat Flow #2 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Broken leads for SHF #2 caused measurements from it to be incorrect during the indicated period. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/30/2001 | 0615 | 03/30/2001 | 1431 |
03/31/2001 | 1115 | 03/31/2001 | 1401 |
Subject: | SGP EBBR E20 - E20 EBBR Battery Voltage Low, Incorrect Data |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Some measurements were incorrect because the battery voltage was low. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2001 | 1115 | 04/06/2001 | 1501 |
04/23/2001 | 1045 | 04/23/2001 | 1331 |
04/07/2001 | 0345 | 04/07/2001 | 1401 |
04/03/2001 | 0215 | 04/03/2001 | 1501 |
04/02/2001 | 1245 | 04/02/2001 | 1701 |
Subject: | SGP EBBR E20 - E20 EBBR Battery Voltage Low, Data Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The indicated data was incorrect because the battery voltage was low. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2001 | 1500 | 10/17/2001 | 0201 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | During the indicated period, TS #3 was large negative or positive or offscale. Average soil heat flow, sensible heat flux, and latent heat flux were incorrect when TS #3 was incorrect. Inspect the 15 and 30 minute TS #3 data to determine the times of incorrect data. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2001 | 1230 | 03/01/2001 | 1231 |
03/07/2001 | 1805 | 03/07/2001 | 1901 |
02/01/2001 | 0000 | 02/22/2001 | 0531 |
Subject: | SGP EBBR E20 - E20 EBBR Soil Heat Flow #4 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The SHF #4 produced large negative values during much of the period because of a broken lead wire. Inspect the data to determine the times of incorrect SHF #4 values. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
Description: | The indicated measurements were incorrect during the 6 month checks. |
Measurements: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/06/2002 | 2130 | 02/07/2002 | 0331 |
11/28/2001 | 0045 | 11/28/2001 | 2031 |
Subject: | SGP/EBBR/E20 - Battery Voltage Low |
DataStreams: | sgp30ebbrE20.b1 |
Description: | When the battery voltage is below 10.5 volts, most of the measurements are suspect. |
Measurements: | 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 |
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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2001 | 1915 | 12/12/2001 | 2031 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #3 Incorrect During Sensor Changeout |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil heat flow #3 measurements were incorrect during it's replacement. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g5)/2 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) Note: during the time period referenced here, soil heat flow #4 and #2 were also incorrect. This quality information is documented in D020717.46, D020717.47 and D020726.1. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2002 | 0315 | 01/13/2002 | 2131 |
01/17/2002 | 0915 | 01/21/2002 | 0901 |
02/09/2002 | 0115 | 02/12/2002 | 0731 |
12/04/2001 | 0000 | 12/12/2001 | 1914 |
02/20/2002 | 1645 | 02/20/2002 | 1831 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 Has a Negative Offset |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil heat flow #2 measurements had a negative offset. Negative values were too small and negative values occurred when positive values should have. This can occur when there is a poor wire connection or a J-panel over-voltage protection device has failed. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g3 + g4 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/24/2001 | 0532 | 12/27/2001 | 1901 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #4 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil heat flow #4 was incorrect because it's wires were loose from the connection terminals. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g2 + g3 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/29/2002 | 1830 | 05/29/2002 | 1901 |
11/27/2001 | 1800 | 11/27/2001 | 1801 |
11/14/2001 | 1600 | 11/14/2001 | 1601 |
05/15/2002 | 1700 | 05/15/2002 | 1701 |
Subject: | SGP/EBBR/E20 - Measurements Zero |
DataStreams: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/06/2002 | 1915 | 03/07/2002 | 1901 |
03/05/2002 | 2015 | 03/06/2002 | 0201 |
02/23/2002 | 1745 | 02/23/2002 | 1801 |
02/24/2002 | 0045 | 02/25/2002 | 0201 |
02/22/2002 | 2015 | 02/22/2002 | 2101 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil temperature 3 was incorrect during the indicated periods. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g2 + g4 + g5)/4 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2002 | 1745 | 02/20/2002 | 1901 |
Subject: | SGP/EBBR/E20 - Measurements Incorrect During Sensor Changeout |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The replacement of soil heat flow 2 caused the loss of initial soil temperature values used in the calculation of CES, G, C, ave_shf, bowen, e, and h. |
Measurements: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2001 | 2032 | 12/24/2001 | 0531 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #2 and #4 incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil heat flow #2 measurements had a negative offset. Negative values were too small and negative values occurred when positive values should have. This can occur when there is a poor wire connection or a J-panel over-voltage protection device has failed. Soil heat flow #4 was incorrect because it's wires were loose from the connection terminals. Average soil heat flow, sensible heat flux, and latent heat flux were affected; these can be recalculated using the remaining good sets of soil sensors as follows: ave_shf = (g1 + g3 + g5)/3 e = -(q + ave_shf)/(1 + bowen) h = -(q + e + ave_shf) |
Measurements: | sgp30ebbrE20.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: | sgp30ebbrE20.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: | sgp30ebbrE20.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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
Description: | Some of the measurements are incorrect during the 6 month checks. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2002 | 1900 | 12/11/2002 | 1929 |
11/13/2002 | 1830 | 11/13/2002 | 1859 |
Subject: | SGP/EBBR/E20 - Data Zero following logger restarts |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Most of the measurements were zero, which normally happens after a datalogger restart. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2002 | 1705 | 09/18/2002 | 1700 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #2 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Temperature #2 was incorrect, apparently from am loose wire after replacement of the EBBR unit. The indicated measurements that are calculated using soil temperature are also incorrect. See the work-around below. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2002 | 2000 | 12/11/2002 | 2029 |
11/13/2002 | 1900 | 11/13/2002 | 1929 |
Subject: | SGP/EBBR/E20 - Change of Energy Storage Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Because soil temperature measurements were not available from the beginning of the half hour, the change in soil energy storage could not be calculated and thus is incorrect. There is no fix to this problem. Average Soil Heat Flow, Sensible Heat Flux (h), and Latent Heat Flux (e) can not be calculated using the available, remaining measurements. |
Measurements: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/04/2002 | 1200 | 12/05/2002 | 1630 |
Subject: | SGP/EBBR/E20 - Wind speed and direction frozen |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Wind Speed and Dierction were frozen in place by an ice storm. |
Measurements: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/30/2002 | 2030 | 01/08/2003 | 1730 |
Subject: | SGP/EBBR/E20 - Reprocess: Heat Flow #3 and #5 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Heat Flow #3 was incorrect because part of the lead wire was cut; apparent vandalism. Soil Heat Flow #5 had been incorrect because of other causes, but was replaced at the same time as #3. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Most of the data was incorrect just after the EBBR unit was replaced. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/2002 | 0930 | 12/20/2002 | 1830 |
12/03/2002 | 1200 | 12/04/2002 | 0400 |
12/08/2002 | 0230 | 12/09/2002 | 0500 |
12/20/2002 | 2100 | 12/21/2002 | 1630 |
12/06/2002 | 2000 | 12/07/2002 | 0230 |
12/22/2002 | 0130 | 12/30/2002 | 2000 |
12/21/2002 | 1730 | 12/22/2002 | 0100 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Heat Flow #5 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Heat Flow #5 was incorrect during these periods. See below for a work-around. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/2002 | 1330 | 11/29/2002 | 2130 |
11/19/2002 | 1700 | 11/19/2002 | 2200 |
11/24/2002 | 1700 | 11/24/2002 | 2200 |
12/02/2002 | 1430 | 12/02/2002 | 2230 |
12/01/2002 | 1930 | 12/01/2002 | 2030 |
11/28/2002 | 1700 | 11/28/2002 | 2300 |
11/27/2002 | 2030 | 11/27/2002 | 2300 |
11/23/2002 | 1430 | 11/23/2002 | 2230 |
11/20/2002 | 1430 | 11/20/2002 | 2200 |
11/22/2002 | 1630 | 11/22/2002 | 2000 |
11/18/2002 | 1900 | 11/18/2002 | 2200 |
11/21/2002 | 2000 | 11/21/2002 | 2030 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #1 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Temperature #1 was intermittently incorrect. The cause is unknown. The indicated measurements that are calculated using soil temperature are also incorrect. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/30/2002 | 2030 | 01/08/2003 | 1730 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Temperature #3 was incorrect. The cause is apparently vandalism; the probe leads were cut. The indicated measurements that are calculated using soil temperature are also incorrect. DQR D030117.19 already provides the work-around for calculating correct sensible (h) and latent heat (e) fluxes, as soil heat flow #3 and soil heat flow #5 were also incorrect during this period. That work-around is repeated below. |
Measurements: | 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: | sgp30ebbrE20.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: | 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 |
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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/20/2002 | 1830 | 12/20/2002 | 2100 |
12/22/2002 | 0100 | 12/22/2002 | 0130 |
12/21/2002 | 1630 | 12/21/2002 | 1730 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature #1 and Soil Heat Flow #5 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Temperature #1 and Soil Heat Flow #5 were incorrect during these periods. The indicated calculated measurements are also incorrect. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2003 | 1000 | 02/01/2003 | 1000 |
Subject: | SGP/EBBR/E20 - RHtop Zero |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The RHtop value in the 30 minute file is zero. 5 and 15 minute files show RHtop correctly. This behavior has been seen infrequently and can probably be attributed to a CR10 communication error. No other data, including the fluxes, are affected. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2003 | 0000 | 01/08/2003 | 1730 |
Subject: | SGP/EBBR/E20 - Soil Heat Flow#5 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Heat Flow #5 was producing incorrect values. Average soil heat flow, sensible heat flux, and latent heat flux were affected. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/2003 | 2100 | 01/08/2003 | 2100 |
Subject: | SGP/EBBR/E20 - Soil Storage Incorrect After Startup |
DataStreams: | sgp30ebbrE20.b1 |
Description: | For the half hour data after CR10 datalogger startup, stored soil temperature values do not exist from the beginning of the half hour. Therefore soil heat storage can not be calculated correctly. This affects numerous measurements that are calculated using soil heat storage. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | 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 |
Description: | When the EBBR system restarted on 15 Oct. 2003, the AEM malfunctioned. Surface fluxes data during this period are incorrect. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/27/2003 | 1800 | 12/10/2003 | 2230 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature Probe #1 Measurements Spiked |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The soil temperature #1 measurement spiked quite high at times. This affected a number of measurements that are dependent on the soil temperature measurements. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Wind direction is incorrect, reading at or about 0 or 15 to 25 degrees. |
Measurements: | 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: | sgp30ebbrE20.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: | 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 |
Description: | The wind speed sensor was frozen stopped by ice from a storm. The wind speed and residual wind speed measurements are incorrect. |
Measurements: | 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: | sgp30ebbrE20.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: | 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 |
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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/2004 | 0700 | 09/29/2004 | 1800 |
08/03/2004 | 0300 | 09/15/2004 | 2000 |
Subject: | SGP/EBBR/E20 - AEM Failure |
DataStreams: | 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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/08/2004 | 2130 | 09/15/2004 | 1930 |
Subject: | SGP/EBBR/E20 - Soil Heat Flow #3 and Soil Temperature #3 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/15/2004 | 1930 | 09/15/2004 | 2030 |
Subject: | SGP/EBBR/E20 - All Soil Measurements Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | All soil measurements were incorrect during the replacement of soil heat flow #3 and soil temperature #3. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Many measurements were incorrect while the AEM was positioned with both aspirators at the same height for comparison checks. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/2004 | 1330 | 03/02/2005 | 1930 |
Subject: | SGP/EBBR/E20 - Soil Moisture #4 and Soil Temperature #4 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Failures of a multiplexer channel and a J-panel channel caused soil temperature #4 and soil moisture #4 to spike and drift at times. Replacement of the failed equipment solved the problem. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/26/2004 | 2100 | 12/08/2004 | 2100 |
Subject: | SGP/EBBR/E20 - Soil Heat Flow #4 Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Soil Heat Flow #4 was missing or offscale and therefore incorrect during the stated period. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/30/2005 | 2000 | 04/13/2005 | 1700 |
Subject: | SGP/EBBR/E20 - Wrong Datalogger Program Installed |
DataStreams: | sgp30ebbrE20.b1 |
Description: | ts4 went offscale and sm4 dropped to a constant 16% when a "new" program was installed on 3/30/05. The wrong program was installed. Because ts4 did not change with time, it did not mess up the calculation of e and h. e and h are slightly overestimated, but only by about 1%, far less than the system error. This is a rare type of instrument problem where the concequences are minimal. Therefore, e and h are not listed as incorrect in this DQR and are still usable during the stated period. |
Measurements: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 03/30/2005 | 1900 |
Subject: | SGP/EBBR/E20 - Improved EBBR CR10 Program |
DataStreams: | sgp30ebbrE20.b1 |
Description: | Effective 20050330.1900, the EBBR.E20 CR10 program was revised to improve the quality of the primary measurements as follows: 1) An RMS procedure is used to determine max and min limits of acceptable soil heat flow. This is applied to the individual soil sets. Measurements outside the limits are rejected and the measurements within the limits are used to calculate the average soil heat flow. 2) Max and min limits are used to determine incorrect values of net radiation, sensible heat flux (h), latent heat flux (e), and automatic exchange mechanism (AEM) signal. If AEM signal is outside the limits, h and e are set to 999s. If net radiation is outside the limits, h and e are set to 999s. If h or e are outside the limits, h and e are set to 999s. Virtually no incorrect soil measurement will affect the primary measurements of h and e. By setting h and e to 999s, it can be easily seen that the primary variables are incorrect; no other interpretation is possible. Prior to 20050330, the improved CR10 program was NOT in effect. DQRs have been submitted for known instances of incorrect soil measurements which affected the quality of the primary measurements of h and e. Note: the DQR begin date is the begin date of the sgp30ebbrE20.b1 data stream. The earlier version of the CR10 program was also used on previous EBBR datastream names (e.g. sgp30ebbrE20.a1). |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2005 | 1730 | 07/06/2005 | 1930 |
09/02/2005 | 1100 | 09/15/2005 | 2230 |
09/01/2005 | 1730 | 09/02/2005 | 0300 |
09/16/2005 | 0100 | 09/28/2005 | 1830 |
08/23/2005 | 1900 | 08/31/2005 | 1700 |
Subject: | SGP/EBBR/E20 - Soil Temperature and Soil Moisture #4 Measurements Incorrect |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The ts4 sensor reported 99999 values because the sensor leads were loose. Soil moisture #4 reported low values (steady 16%) during this time period. The sensible and latent heat fluxes were not affected by this problem, only soil temperature and soil moisture #4. See soil temperatures and soil moistures from sets #2, #3, and #5 for correct values (note: soil temperature #1 was having problems during the same time). |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/02/2005 | 1900 | 03/30/2005 | 1900 |
Subject: | SGP/EBBR/E20 - Average Soil Heat Flux Incorrect |
DataStreams: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
Description: | Much of the data was incorrect during replacement of J-Panel #1. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | Some measurements may be incorrect because of low supply voltage. |
Measurements: | 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 |
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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2007 | 1500 | 09/12/2007 | 2045 |
Subject: | SGP/EBBR/E20 - Reprocessing Notice (RID 449) |
DataStreams: | sgp30ebbrE20.b1 |
Description: | See below for details of reprocessing that was completed on 20150310. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- 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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/15/2007 | 0000 | 10/24/2007 | 1900 |
Subject: | SGP/EBBR/E20 - Reprocessing Notice (RID 453) |
DataStreams: | sgp30ebbrE20.b1 |
Description: | See below for details of reprocessing that was completed on 20150310. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- 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: | 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: | sgp30ebbrE20.b1 |
Description: | The wind direction was offset high about 50 degrees. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | The wind direction measurement was stuck at 40 degrees. |
Measurements: | 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: | sgp30ebbrE20.b1 |
Description: | The wind speed sensor was frozen stopped by freezing rain. |
Measurements: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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 |
Description: | Net Radiation was too large resulting in overestimated sensible heat and latent heat fluxes. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/1995 | 0730 | 07/19/1995 | 1500 |
07/29/1995 | 0700 | 07/29/1995 | 1630 |
07/18/1995 | 0400 | 07/18/1995 | 1400 |
07/19/1995 | 0430 | 07/19/1995 | 0500 |
Subject: | SGP/EBBR/E20 - Reprocess: Soil Temperature Malfunction |
DataStreams: | sgp30ebbrE20.b1 |
Description: | During parts of three days, soil temperature probe #4 indicated values that were either too high or too low, for unknown reasons. Site Operations personnel checked connections and repacked the soil around the probe on 21 July at about 1535 GMT, although ts4 had recovered to proper values the previous day. The times of incorrect data and the affected quantities are shown below. Some of the ts4 values during the listed periods appear to be correct, although the change in energy storage values appear to indicate otherwise. 18 July: 0400-1400 GMT 19 July: 0430-0500, 0730-1500 GMT 29 July: 0700-1630 GMT 15 minute: rr_ts4 30 minute: ts4, ces4, g4, ave_shf, e, h Sensible, latent, and soil heat fluxes need to be recalculated using the change in energy storage of probes 1-3 and 5, as follows. ave_shf = (g1 + g2 + g3 + g5)/4 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q) |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/1995 | 0930 | 08/09/1995 | 2030 |
Subject: | SGP/EBBR/E20 - Annual Calibration Changeout |
DataStreams: | sgp30ebbrE20.b1 |
Description: | On August 9, 1995 between 0930-2030 GMT, the changeout for annual calibration occurred at E20, Meeker, OK. Soil measurements data should be used with caution for the following week at least, as the sensors require time to "settle" into the soil. |
Measurements: | 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: | 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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/10/1995 | 0030 | 11/10/1995 | 1530 |
Subject: | SGP/EBBR/E20 - Soil Heat Flow Zero Under Unchanging Conditions |
DataStreams: | sgp30ebbrE20.b1 |
Description: | This DQR is written to inform users of the data that the EBBR soil heat flow measurements of zero during much of 11 November 1995 at E20, Meeker, OK are correct values. Nearly unchanging conditions of net radiation, air temperature, and soil moisture, plus high wind speeds and near neutral atmospheric stability, resulted in almost unchanging conditions of soil temperature and ten and a half hours of zero soil heat flow output from all soil heat flow plates (some plates outputted zero for longer than this). The change in energy storage (determined from the change in temperature with time of the soil above the plates) was very nearly zero also during the period of interest. Such an extended period of zero soil heat flow and the accompanying unchanging soil and atmospheric conditions is quite rare and therefore worth noting here in case someone using the data might mistakenly think that the data is incorrect. |
Measurements: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/1995 | 0300 | 11/11/1995 | 1600 |
Subject: | SGP/EBBR/E20 - AEM Exchange Stopped in Snow and Freezing Rain |
DataStreams: | sgp30ebbrE20.b1 |
Description: | On the night of November 10-11, a north-south line from south central Kansas through south central Oklahoma received snow and freezing rain and experienced below freezing temperatures. This caused the EBBR automatic exchange mechanism (AEM) to stop exchanging temporarily. Note that temperatures, relative humidities, and vapor pressures are not affected; these are correct as measured, but the height at which the measurements occurred must be determined from the home signal value. |
Measurements: | 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 |
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: | 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 |
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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/08/1996 | 2145 | 06/19/1996 | 1700 |
Subject: | SGP/EBBR/E20 - Incorrect Data from Left Humidity Probe |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The left humidity probe output started drifting upward at 2145 GMT on May 8, 1996 and went offscale (over 105%) at 0200 GMT on May 9, 1996. The output settled at approximately 113% and remained there until the probe was replaced on June 19, 1996. The first correct 15 minute values were at 1630 GMT on June 19 and the first correct 30 minute values were at 1700 GMT. During the period of incorrect left probe RH data, the following values were incorrect: 15 minute: mv_hum_l 30 minute: hum_top, hum_bot, vp_top, vp_bot, h, e, bowen. |
Measurements: | 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 |
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: | 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 |
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: | sgp30ebbrE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/11/1997 | 0000 | 07/16/1997 | 2359 |
Subject: | SGP/EBBR/E20 - Reprocess: E20 Soil Probes #3 Cables Cut |
DataStreams: | sgp30ebbrE20.b1 |
Description: | The cables going to #3 soil temperature, moisture, and heat flow probes were cut by a mower on 11 June 1997 and were repaired on 16 July 1997. Data for the temperature probe was offscale, for the soil moisture probe was a constant 10.1 (close to the actual), and for the soil heat flow was large negative during the period. The following are the data quantities that were affected: 15 minute: rr_ts3, mv_hft3, r_sm3 30 minute: ts3, ces3, shf3, c_shf3, cs3, g3, ave_shf, e, h Sensible, latent, and soil heat fluxes can be recalculated using the values from probes 1, 2, 4, and 5, as follows. ave_shf = (g1 + g2 + g4 + g5)/4 e = -(q + ave_shf)/(1 +bowen) h = -(e + ave_shf +q) |
Measurements: | 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 |
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: | 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: | sgp30ebbrE20.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: | 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 |
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: | 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: | sgp30ebbrE20.b1 |
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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | 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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.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: | 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: | sgp30ebbrE20.b1 |
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: | 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: | 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: | 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: | sgp30ebbrE20.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: | sgp30ebbrE20.b1:
|