| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D010215.5 | SGP/MWR/C1 - IRT failure | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| D030312.10 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| D040824.1 | SGP/MWR/C1 - Wet window flag "on" more frequently than expected | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/17/2000 | 0000 | 01/24/2001 | 1600 |
| Subject: | SGP/MWR/C1 - IRT failure |
| DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| Description: | The IRT was damaged by internal moisture causing sky temperature measurements that are negatively biased compared to those from the AERI. IRT#0517 was returned to the manufacturer for repair and was replaced with spare IRT#1254. |
| Measurements: | sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/17/1999 | 1800 | 07/31/2002 | 2034 |
| Subject: | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures |
| DataStreams: | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| Description: | Several related and recurring problems with the SGP MWRs have been reported dating back to 1999. These problems were due to the occurrence of blackbody signals (in counts) that were half of those expected. The symptoms included noisy data (especially at Purcell), spikes in the data (especially at Vici), negative brightness temperatures, and apparent loss of serial communication between the computer and the radiometer, which results in a self-termination of the MWR program (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP site operations personnel (1) repeatedly cleaned and replaced the fiber optic comm. components, (2) swapped radiometers, (3) sent radiometers back to Radiometrics for evaluation (which has not revealed any instrument problems), and (4) reconfigured the computer's operating system. Despite several attempts to isolate and correct it, the problem persisted. It became apparent that some component of the Windows98 configuration conflicted with the DOS-based MWR program or affected the serial port or the contents of the serial port buffer. This problem was finally corrected by upgrading the MWR software with a new Windows-compatible program. |
| Measurements: | sgp5mwravgC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/1999 | 0000 | 12/21/1999 | 2359 |
| 11/10/2000 | 0000 | 12/08/2000 | 2359 |
| 01/26/2001 | 0000 | 03/05/2001 | 2359 |
| 12/18/2001 | 0000 | 12/31/2001 | 2359 |
| 02/11/2002 | 0000 | 02/28/2002 | 2359 |
| 02/19/2003 | 0000 | 03/26/2003 | 2359 |
| 10/15/2003 | 0000 | 11/03/2003 | 2359 |
| Subject: | SGP/MWR/C1 - Wet window flag "on" more frequently than expected |
| DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
| Description: | The wet window flag was set "on" more frequently than expected during the time periods specified. This indicates the heater has been running more than necessary. In most instances the moisture sensitivity was adjusted at the end of these periods. |
| Measurements: | sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|