| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D040706.1 | SGP/SIRS/E22 - Failed NIP sensor cable | sgpsirs20sE22.a0, sgpsirsE22.00, sgpsirsE22.b1 |
| D060630.28 | SGP/SIRS/E22 - Reprocessed: Longwave Calibration error | sgpsirsE22.b1 |
| D080627.1 | SGP/SIRS/E21 - Ventilator Fan Failure | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/30/2004 | 0156 | 07/07/2004 | 1800 |
| Subject: | SGP/SIRS/E22 - Failed NIP sensor cable |
| DataStreams: | sgpsirs20sE22.a0, sgpsirsE22.00, sgpsirsE22.b1 |
| Description: | The suntracker was driven past it optical limit switch and pulled the direct normal (NIP) instrument cable from its connector. |
| Measurements: | sgpsirs20sE22.a0:
sgpsirsE22.b1:
sgpsirsE22.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/23/2003 | 1830 | 02/15/2006 | 1741 |
| Subject: | SGP/SIRS/E22 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE22.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 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 August 2006. |
| Measurements: | sgpsirsE22.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/01/2007 | 0000 | 07/01/2008 | 1500 |
| Subject: | SGP/SIRS/E21 - Ventilator Fan Failure |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | Start time is uncertain due to length of time this problem existed. During the time frame specified the PSP (down_short_hemisp) and 8-48 (down_short_diffuse_hemisp) ventilator fans failed. PM replaced the fans 7/1/2008 1500. Ventilator failure does adversely affect thermopile radiometer measurements but the extent has not been quantified. The 8-48 is significantly less affected than the PSP. Mentor suggests using component sum method detailed in SIRS instrument handbook where down_short_hemisp = down_short_diffuse + short_direct_normal * cos (zenith angle) for each time record. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|