| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D030917.18 | SGP/SIRS/E18 - Missing data due to Ice storm and clock problems | sgpsirsE18.00 |
| D031020.3 | SGP/SIRS/E18 - Instrument noise problem | sgpsirsE18.00 |
| D050205.4 | SGP/SIRS/E18 - Possible PSP dome contamination | sgpsirsE18.00 |
| D061115.2 | SGP/SIRS/E18 - Upwelling SW cable severed | sgpsirsE18.00 |
| D080128.1 | SGP/SIRS/C1/E1/E10/E11/E12/E13/E15/E16/E18/E19/E2/E20/E21/E22/E24/E25/E27/E3/E4/E5/E6/E7/E8/E9 - Ice | sgpsirsE16.00, sgpsirsE18.00 |
| D080626.1 | SGP/SIRS/E18 - Ventilator Fan Failure | sgpsirsE18.00 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/09/2002 | 2102 | 03/10/2002 | 2040 |
| 03/13/2002 | 1702 | 03/14/2002 | 1604 |
| Subject: | SGP/SIRS/E18 - Missing data due to Ice storm and clock problems |
| DataStreams: | sgpsirsE18.00 |
| Description: | Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems. |
| Measurements: | sgpsirsE18.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/09/2003 | 1000 | 10/20/2003 | 0000 |
| Subject: | SGP/SIRS/E18 - Instrument noise problem |
| DataStreams: | sgpsirsE18.00 |
| Description: | Upwelling longwave data was somewhat noisy during this period. There
was a direct relation to the case and dome thermistor measurements for
the upwelling longwave PIR (UIR). Data quality does not appear to be
greatly affected overall, though instantaneous values had greater
than usual variability. The noise disappeared on 10/19. |
| Measurements: | sgpsirsE18.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/03/2005 | 1200 | 02/15/2005 | 2250 |
| Subject: | SGP/SIRS/E18 - Possible PSP dome contamination |
| DataStreams: | sgpsirsE18.00 |
| Description: | Downwelling shortwave hemispheric (DSH) measurements did not agree with derived DSH readings during the morning hours up to 1500GMT each clear day. PM cleaning on 2/16 2250 revealed nothing other than dirty water spots. A dirty or ice covered PSP dome may have been the cause, clearing itself before the PM crew arrived. |
| Measurements: | sgpsirsE18.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/07/2006 | 0100 | 11/20/2006 | 2300 |
| Subject: | SGP/SIRS/E18 - Upwelling SW cable severed |
| DataStreams: | sgpsirsE18.00 |
| Description: | The Upwelling Shortwave signal was exceeding physical limits. Ops reported the upwelling shortwave cable was damaged by rodents. The cable was repaired and returned to service. |
| Measurements: | sgpsirsE18.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/10/2007 | 0000 | 12/25/2007 | 2359 |
| Subject: |
|
| DataStreams: | sgpsirsE16.00, sgpsirsE18.00 |
| Description: | Ice storms affected the SGP central and extended facilities starting Dec 10 0000GMT to mid/late December. Each facility was affected at various times and degrees dependant on elevation, latitude and whether power failed for short or extended periods of time. By December 15th most ice had melted from the radiometers at all the faclities but power outages and tracker failures persisted at some stations. |
| Measurements: | sgpsirsE18.00:
sgpsirsE16.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/18/2008 | 0000 | 06/30/2008 | 2110 |
| Subject: | SGP/SIRS/E18 - Ventilator Fan Failure |
| DataStreams: | sgpsirsE18.00 |
| Description: | At the start time specified the PSP (down_short_hemisp) ventilator fan failed. PM replaced the fan 6/30/2008 2110. Ventilator failure does adversely affect radiometer measurements but the extent has not been quantified. 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: | sgpsirsE18.00:
|