DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D040608.2 | SGP/BRS/C1 - NIP sensor failure | sgpbrsC1.b1 | Missing |
D050322.1 | SGP/BRS/C1 - low downwelling shortwave readings | sgpbrsC1.b1 | Suspect |
D060630.7 | SGP/BRS/C1 - Reprocessed: Longwave Calibration error | sgpbrsC1.b1 | Does not affect quality |
D061102.1 | SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement | sgpbrsC1.b1 | Suspect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/02/2004 | 1734 | 06/15/2004 | 2010 | Missing |
Subject: | SGP/BRS/C1 - NIP sensor failure |
DataStreams: | sgpbrsC1.b1 |
Description: | Normal incidence values of downwelling shortwave radiation were reported as -9999 (missing). The NIP instrument was damaged by lightning in the area near the time of failure. |
Measurements: | sgpbrsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/18/2003 | 0000 | 12/17/2004 | 2030 | Suspect |
Subject: | SGP/BRS/C1 - low downwelling shortwave readings |
DataStreams: | sgpbrsC1.b1 |
Description: | Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in clear-sky conditions. Corrective maintenance on 12/17/2004 corrected this offset. It is not clear which CM action corrected the problem since the DS instrument cable was grounded to a new location and the DS ventilator fan was found in poor condition and was replaced. Either of these issues could have led to the problem observed in this instrument. |
Measurements: | sgpbrsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/11/2003 | 1935 | 02/16/2006 | 1903 | Does not affect quality |
Subject: | SGP/BRS/C1 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpbrsC1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in June 2004. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in November 2006. |
Measurements: | sgpbrsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/11/2003 | 1920 | 06/14/2004 | 2359 | Suspect |
Subject: | SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement |
DataStreams: | sgpbrsC1.b1 |
Description: | On 20031211 the Downwelling LW pyrgeometer was replaced but the calibrations were not updated. Calibrations have been corrected in data beginning 20040615. |
Measurements: | sgpbrsC1.b1:
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