DQR ID | Subject | Data Streams Affected |
---|---|---|
D010202.3 | NSA/MWR/C1 - negative sky brightness temperatures | nsamwrlosC1.a1, nsamwrlosC1.b1 |
D010202.5 | NSA/MWR/C1 - Reprocess: calibration change | nsamwrlosC1.a1, nsamwrlosC1.b1 |
D010202.6 | NSA/MWR/C1 - incorrect flagging of data | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
D010202.7 | NSA/MWR/C1 - incorrect flagging of data | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
D030312.6 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | nsamwrlosC1.a1, nsamwrlosC1.b1 |
D030822.7 | NSA/MWR/C1 - min/max/delta values incorrect | nsamwrlosC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/2000 | 0000 | 12/21/2000 | 2359 |
Subject: | NSA/MWR/C1 - negative sky brightness temperatures |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
Description: | The data exhibit occasional negative sky brightness temperatures. The problem was corrected when the computer was reconfigured following a virus infection. |
Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/22/2000 | 2330 | 11/24/2000 | 1400 |
Subject: | NSA/MWR/C1 - Reprocess: calibration change |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
Description: | The thicker (1/2-inch) insulation was installed on the RF deck and the reference temperature was reduced from 50 C to 30 C to prevent thermal instability in winter. A change in the mixer temperature affects the instrument's calibration. A new calibration was automatically derived and applied after 1500 valid tip curves were acquired. During the period after the temperature was reset and before the calibration was updated, the previous calibration was used. |
Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2000 | 0000 | 11/20/2000 | 2359 |
Subject: | NSA/MWR/C1 - incorrect flagging of data |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
Description: | The wet window flag is set high more than expected. |
Measurements: | nsamwrlosC1.a1:
nsamwrtipC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/07/2000 | 0000 | 12/22/2000 | 2359 |
Subject: | NSA/MWR/C1 - incorrect flagging of data |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
Description: | The wet window flag is set high more frequent than expected. |
Measurements: | nsamwrlosC1.a1:
nsamwrtipC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/07/1999 | 1800 | 09/16/2002 | 1820 |
Subject: | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
Description: | Several related and recurring problems with the 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, spikes in the data, 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. Because these all initially appeared to be hardware-related problems, the instrument mentor and 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 did 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: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/1998 | 0000 | 02/08/2003 | 2359 |
Subject: | NSA/MWR/C1 - min/max/delta values incorrect |
DataStreams: | nsamwrlosC1.b1 |
Description: | The values of valid_min, valid_max, and valid_delta for fields tkxc and tknd were incorrect. They should be 303, 333, and 0.5 K, respectively. |
Measurements: | nsamwrlosC1.b1:
|