DQR ID | Subject | Data Streams Affected |
---|---|---|
D060630.6 | SGP/IRT/C1 - Reprocess: Longwave Calibration error | sgpirt25mC1.b1 |
D080930.2 | SGP/IRT/C1 - Contamination of 25M lens | sgpirt25mC1.b1 |
D121022.1 | SGP/IRT/C1 - Measurement range | sgpirt10mC1.b1, sgpirt25mC1.b1 |
D130501.1 | SGP/IRT/C1 - 25m IRT ground surface temperature | sgpirt25mC1.b1 |
D130924.4 | SGP/IRT/C1 - Degraded hardware | sgpirt25mC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2004 | 2052 | 02/14/2006 | 2050 |
Subject: | SGP/IRT/C1 - Reprocess: Longwave Calibration error |
DataStreams: | sgpirt25mC1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. 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 are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | sgpirt25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2008 | 0000 | 10/01/2008 | 1905 |
Subject: | SGP/IRT/C1 - Contamination of 25M lens |
DataStreams: | sgpirt25mC1.b1 |
Description: | The IRT exhibited a positive bias compared to PIR. The problem was corrected by cleaning the lens. |
Measurements: | sgpirt25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/2012 | 1800 | 08/04/2012 | 2059 |
Subject: | SGP/IRT/C1 - Measurement range |
DataStreams: | sgpirt10mC1.b1, sgpirt25mC1.b1 |
Description: | The ground surface temperature exceeded the maximum measurement of 50C on some days. The maximum was increased to 60C for IRT10m on 10/1/2012 at 15:25 and for IRT25m on 10/9/2012 at 21:45. |
Measurements: | sgpirt25mC1.b1:
sgpirt10mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2012 | 0750 | 02/08/2013 | 1957 |
Subject: | SGP/IRT/C1 - 25m IRT ground surface temperature |
DataStreams: | sgpirt25mC1.b1 |
Description: | The 10m IRT was measuring lower ground surface temperature than the 25m IRT. The 25m lens was cleaned on 12/24/2012 and replaced on 2/8/2013 but the difference in temperature appears to be due to the seasonal difference in surface cover - tall grass vesus bare soil. |
Measurements: | sgpirt25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/26/2012 | 0000 | 09/19/2013 | 1500 |
Subject: | SGP/IRT/C1 - Degraded hardware |
DataStreams: | sgpirt25mC1.b1 |
Description: | The surface temperature from the 25m IRT was ~10K less than measured from the PIR. The lens was replaced on 2/8/2013 but there is still a bias. The problem was corrected when the IRT (and that at 10m) was upgraded to a newer model. |
Measurements: | sgpirt25mC1.b1:
|