DQR ID | Subject | Data Streams Affected |
---|---|---|
D030822.7 | NSA/MWR/C1 - min/max/delta values incorrect | nsamwrlosC1.b1 |
D060420.8 | NSA/MWR/C1 - software upgrade (version 3.28) | nsamwrlosC1.a1, nsamwrlosC1.b1 |
D990106.3 | NSA/MWR/C1 - Software Change | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
D990114.1 | NSA/MWR/C1 - Spikes in PWV data | 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:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/1998 | 0000 | 02/03/1999 | 1200 |
Subject: | NSA/MWR/C1 - software upgrade (version 3.28) |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
Description: | The MWR operating program was upgraded to version 3.28 on 3 February 1999. This version includes a beam width correction as well as providing the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) The improvement in the quality of the tip curves resulting from the auto- leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. |
Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/19/1998 | 0053 | 11/16/1998 | 1800 |
Subject: | NSA/MWR/C1 - Software Change |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
Description: | The MWR operating software was changed on 16 November 1998 to provide additional functionality as described below. This change affects the format of the raw and ingested data. NEW FEATURES 1. Faster sampling rate Standard line-of-sight (LOS) observations can now be acquired at 15-second intervals vs. 20-second intervals previously. (The standard LOS cycle is comprised of one sky sample per blackbody sample and gain update.) 2. More flexible sampling strategy Multiple sky observations can be acquired during a LOS cycle, up to 1024 per gain update. This permits sky samples to be acquired at intervals of 2.67 seconds for improved temporal resolution of cloud liquid water variations and better coordination with the millimeter cloud radar during IOPs. 3. Separation of zenith LOS observations from TIP data When the radiometer is in TIP mode, the zenith LOS observations are now extracted, the PWV and LWP computed and reported separately in the output file. This eliminates the periods of missing LOS data during calibration checks/updates. 4. Automatic self-calibration The software now permits the calibration to be updated at specified intervals or continuously. In the first case, LOS mode is automatically changed to TIP mode at user-specified intervals or whenever clear sky conditions occur, the tip data reduced, the calibration updated, and the radiometer returned to LOS mode without operator intervention. In the second case, the radiometer is continuously is TIP mode until changed by the operator. 5. Graphical user display The graphical display is comprised of a status display, a message display, a temperature plot, a plot of the retrieved PWV and LWP, and (in TIP mode) a plot of the latest tip curves. |
Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/09/1998 | 0500 | 06/09/1998 | 2345 |
Subject: | NSA/MWR/C1 - Spikes in PWV data |
DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
Description: | The PWV data began exhibiting a pattern of large (~5 cm) spikes which exponetially degrade to normal values. The problem is due to a fault in the serial or fiber optic data communication. This pattern began intermittent occurrence on 4/9/98 but it dominates the data by 5/1/98. |
Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
|