| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D050106.4 | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1 |
| D050206.2 | SGP/SIRS/C1 - Monthly Summary | sgpsirsC1.b1 |
| D050929.1 | SGP/SIRS/C1 - sun tracker power failure | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 |
| D061121.2 | SGP/SIRS/C1 - Upwelling SW cable problem | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| D070306.1 | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/2004 | 1429 | 01/07/2005 | 1623 |
| Subject: | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1 |
| Description: | It appears the datalogger program at SIRS/C1 was automatically updated, unbeknownst to anyone, on 9/27/20041423GMT with an older program with incorrect UIR and DIR calibration coefficients. The correct and incorrect cal coeffs for the UIR and DIR pyrgeometers during this DQR period were: incorrectUIR correctUIR K0 -12.84 -13.00 K1 .2250 0.2573 K2 1.024 1.024 K3 -1.9280 -1.8050 incorrectDIR correctDIR K0 -13.15 -26.89 K1 0.2374 0.2967 K2 1.0260 1.0560 K3 -2.478 -3.3080 |
| Measurements: | sgpsirsC1.b1:
sgpsirsC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/2004 | 0000 | 01/01/2005 | 0000 |
| Subject: | SGP/SIRS/C1 - Monthly Summary |
| DataStreams: | sgpsirsC1.b1 |
| Description: | dominant problem here is the daytime 3 component problem. Direct and Diffuse are always too high and Global is too low. The problem occurs around the time that the testing regime switches from twilight to daytime testing regimes or from daytime to twilight. The flags occur in significant numbers on the 1st - 5th, 8th - 20th, 24th - 28th, 30th, and 31st. The failures vary in magnitude and duration. The worst flags for a particular day is typically high level yellow, with respect to this problem. Global goes below daytime empirical limits on both the 5th and 6th for substantial periods of time. Diffuse also goes below daytime empirical limits on the 6th in the evening. Upwelling Longwave is below empirical limits on the 24th. This may not be a problem, as many sites exhibited the same problem on the same night. Exceptionally cold temperatures may be the cause. Direct also exceeds its daytime empirical limit on the 1st, 4th, 10th, 13th, 14th, and 20th. This occurs at the changeover from medium to high air mass and does not last for longer than 30 minutes. |
| Measurements: | sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/2005 | 1430 | 09/27/2005 | 1630 |
| Subject: | SGP/SIRS/C1 - sun tracker power failure |
| DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| Description: | C1 experienced a sun tracker power faulure. The tracker was reset by onsite personnel shortly after the power failed. Only shaded and direct instruments were affected - i.e. the downwelling diffuse measurement from the 8-48 B&W pyranometer and the direct normal measurement from the NIP pyrheliometer. The downwelling longwave PIR data was unaffected by this event. |
| Measurements: | sgpsirsC1.b1:
sgpsirsC1.00:
sgpsirs20sC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/11/2003 | 1950 | 02/16/2006 | 1901 |
| Subject: | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsC1.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 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 October 2006. |
| Measurements: | sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/13/2006 | 0900 | 01/23/2007 | 1930 |
| Subject: | SGP/SIRS/C1 - Upwelling SW cable problem |
| DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| Description: | Starting 11/13/2006, the C1 SIRS Upwelling Shortwave (up_short_hemisp) started to show large differences in comparison to co-located E13 SIRS and C1 IRT25m. After much troubleshooting and gnashing of teeth it was discovered that rodents had chewed through the instrument cables at the bottom of the tilt tower. Cables were replaced 01/23/2007 1930GMT. |
| Measurements: | sgpsirsC1.b1:
sgpsirsC1.00:
sgpsirs20sC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/03/2006 | 1509 | 03/06/2007 | 1610 |
| Subject: | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients |
| DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.00, sgpsirsC1.b1 |
| Description: | Incorrection calibration coefficients were used in the C1/SIRS datalogger program. The PSP-US (upwelling shortwave global hemispheric), 30943F3 should be 126.93 not 129.93 [W/m2/mV]. |
| Measurements: | sgpsirsC1.b1:
sgpsirsC1.00:
sgpsirs20sC1.a0:
|