DQR ID | Subject | Data Streams Affected |
---|---|---|
D060419.3 | NIM/MWRP/M1 - Instrument noise problem | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
D060419.4 | NIM/MWR/M1 - Instrument noise problem/RF interference | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
D060713.1 | NIM/MWRP/M1 - 51.25 GHz channel calibration drifted | nimmwrpM1.b1 |
D060718.1 | NIM/MWR/M1 - Radiometer occasionally overheating | nimmwrlosM1.b1, nimmwrtipM1.a1 |
D061117.1 | NIM/MWRP/M1 - Reprocessed: K-band calibration drift corrected | nimmwrpM1.b1 |
Start Date | Start Time | End Date | End Time |
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Subject: | NIM/MWRP/M1 - Instrument noise problem |
DataStreams: | nimmwrpM1.00, nimmwrpM1.b1, nimmwrprawM1.00 |
Description: | There are spikes and elevated noise in MWRP data. The origine of the spikes is RF interference from various sources. All brightness temperatures are affected, but in particular the 5 K-band channels. LWP retrievals are noisy and affected by spikes as a result. |
Measurements: | nimmwrprawM1.00:
nimmwrpM1.b1:
nimmwrpM1.00:
|
Start Date | Start Time | End Date | End Time |
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Subject: | NIM/MWR/M1 - Instrument noise problem/RF interference |
DataStreams: | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | Data are affected by intermittent spikes that become more frequent starting in March 2006. Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably RF interference. |
Measurements: | nimmwrlosM1.b1:
nimmwrM1.00:
nimmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
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Subject: | NIM/MWRP/M1 - 51.25 GHz channel calibration drifted |
DataStreams: | nimmwrpM1.b1 |
Description: | After a power outage on May 5 the 51.25 GHz had a slight change in the calibration. The resulting LWP computed by using all 6 channels increased of about 0.025 mm (25 g/m2). |
Measurements: | nimmwrpM1.b1:
|
Start Date | Start Time | End Date | End Time |
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Subject: | NIM/MWR/M1 - Radiometer occasionally overheating |
DataStreams: | nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | The radiometer is occasionally thermally unstable. The thermal instability occurs when the air temperature exceeds approximately 42.8 degree C (about 316-317 K). This has been happening since March. The most affected months are March, May, and June. |
Measurements: | nimmwrlosM1.b1:
nimmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/01/2006 | 0000 | 11/17/2006 | 1713 |
Subject: | NIM/MWRP/M1 - Reprocessed: K-band calibration drift corrected |
DataStreams: | nimmwrpM1.b1 |
Description: | During October and November there was a drift in the K-Band calibration of the MWRP. This resulted in brightness temperatures that were too high. New calibration coefficients were derived from the median value of the noise diode temperature for the months of October and November and the data were reprocessed to apply the corrected calibrations. The reprocessed data were archived in January 2007. |
Measurements: | nimmwrpM1.b1:
|