| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D000717.1 | TWP/MWR/C1 - Rain on window | twpmwrlosC1.b1, twpmwrtipC1.a1 |
| D040220.1 | TWP/MWR/C1 - wrong azimuth | twpmwrlosC1.b1 |
| D060420.6 | TWP/MWR/C1 - Software Change | twpmwrlosC1.b1 |
| D060420.9 | TWP/MWR/C1 - software upgrade (version 3.29) | twpmwrlosC1.b1 |
| D070105.1 | TWP/MWR/C1 - Missing data | twpmwrlosC1.b1 |
| D990916.1 | SGP/MWR/B1/B4/B5/B6 - data file split at 23:59 | sgpmwrlosB1.a1, sgpmwrlosB1.b1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB1.a1, sgpmwrtipB4.a1, sgpmwrtipB5.a1, sgpmwrtipB6.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/25/1997 | 0000 | 11/13/1997 | 0000 |
| 12/01/1997 | 0000 | 01/13/1998 | 0000 |
| 04/01/1998 | 0000 | 03/31/1999 | 0000 |
| Subject: | TWP/MWR/C1 - Rain on window |
| DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
| Description: | The data is subject to contamination due to rain on the sensor window and should be used with caution because the heater/blower assembly that prevents water from accumulating on the sensor's teflon window was out of commission. |
| Measurements: | twpmwrlosC1.b1:
twpmwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/1996 | 0000 | 02/18/2004 | 2250 |
| Subject: | TWP/MWR/C1 - wrong azimuth |
| DataStreams: | twpmwrlosC1.b1 |
| Description: | The MWR was initially installed at an azimuth angle defined as 180 degrees but the value in the configuration file was not changed from the default of 0 degrees. In examining photos taken during the installation of the AWS tower, I noticed that the MWR was rotated opposite the normal orientation. The value in the configuration file was changed to reflect the actual azimuth of the instrument. |
| Measurements: | twpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/1996 | 0000 | 02/27/1999 | 1200 |
| Subject: | TWP/MWR/C1 - Software Change |
| DataStreams: | twpmwrlosC1.b1 |
| Description: | The MWR operating software was changed on 27 February 1999 to provide additional functionality as described below. 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: | twpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/11/1996 | 0000 | 03/15/1999 | 1700 |
| Subject: | TWP/MWR/C1 - software upgrade (version 3.29) |
| DataStreams: | twpmwrlosC1.b1 |
| Description: | The MWR operating program was upgraded to version 3.29 on 15 March 1999. This version included a beam width correction as well as provided 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: | twpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/09/1996 | 2338 | 12/11/1996 | 0003 |
| 02/28/1997 | 0118 | 06/27/1997 | 2048 |
| 11/06/1997 | 1959 | 11/12/1997 | 1800 |
| 01/05/1998 | 0204 | 01/08/1998 | 2048 |
| 04/21/1998 | 0017 | 04/29/1998 | 1803 |
| 09/13/1998 | 0759 | 09/20/1998 | 0900 |
| 11/20/1998 | 2226 | 11/27/1998 | 1026 |
| 02/27/1999 | 0600 | 03/02/1999 | 0159 |
| 03/06/1999 | 0800 | 03/09/1999 | 1807 |
| 09/03/1999 | 0300 | 09/10/1999 | 0400 |
| 10/01/1999 | 0900 | 10/18/1999 | 0000 |
| 10/20/1999 | 0500 | 10/22/1999 | 0600 |
| 01/14/2000 | 0800 | 01/16/2000 | 0342 |
| 01/14/2006 | 1258 | 01/16/2006 | 0638 |
| Subject: | TWP/MWR/C1 - Missing data |
| DataStreams: | twpmwrlosC1.b1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | twpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/29/1998 | 0000 | 08/12/1999 | 2359 |
| Subject: | SGP/MWR/B1/B4/B5/B6 - data file split at 23:59 |
| DataStreams: | sgpmwrlosB1.a1, sgpmwrlosB1.b1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB1.a1, sgpmwrtipB4.a1, sgpmwrtipB5.a1, sgpmwrtipB6.a1 |
| Description: | A problem with the MWR operating software has been corrected. However, several files were generated that contain one record of data collected at midnight but labeled with the previous day's date. |
| Measurements: | sgpmwrlosB5.a1:
sgpmwrlosB1.a1:
sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
sgpmwrtipB5.a1:
sgpmwrlosB1.b1:
sgpmwrtipB1.a1:
sgpmwrlosB4.a1:
sgpmwrlosB5.b1:
sgpmwrlosB6.a1:
|