| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D010202.6 | NSA/MWR/C1 - incorrect flagging of data | nsamwrlosC1.b1, nsamwrlosC1.a1, nsamwrtipC1.a1 |
| D010202.7 | NSA/MWR/C1 - incorrect flagging of data | nsamwrlosC1.b1, nsamwrlosC1.a1, nsamwrtipC1.a1 |
| D010504.4 | NSA/MWR/C1 - Reprocess: calibration change | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D030115.1 | NSA/MWR/C1 - REPROCESS: Wrong Calibration | nsamwrlosC1.a1, nsamwrtipC1.a1 |
| D030515.3 | NSA/MWR/C1 - no air temperature signal | nsamwrC1.00, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D040116.1 | NSA/MWR/C1 - damaged window | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1, nsaqmemwrcolC1.c1 |
| D050112.1 | NSA/C1 - Site-wide power failure | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaeriengineerC1.b1, nsaaerisummaryC1.b1, nsa915rwptempconC1.a1, nsa915rwptempmomC1.a0, nsa915rwptempspecC1.a0, nsa915rwpwindconC1.a1, nsa915rwpwindmomC1.a0, nsa915rwpwindspecC1.a0, nsamettwr4hC1.b1, nsammcrmomC1.b1, nsamplC1.a1, nsamplpsC1.a0, nsamwrlosC1.b1, nsamwrtipC1.a1, nsamwrpC1.b1, nsatwrcam40mC1.a1, nsavceil25kC1.b1 |
| D050203.1 | NSA/MWR/C1 - poor air temperature values | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D050725.7 | NSA/MWR/C1 - Reprocess: Revised Calibration Coefficients | nsa5mwravgC1.c1, nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1, nsaqmemwrcolC1.c1 |
| D050809.2 | NSA/MWR/C1 - Possible loss of accuracy due to missing blower | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D050928.3 | NSA/MWR/C1 - New software version (4.15) installed | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D050930.1 | NSA/MWR/C1 - Reprocess: wrong calibration | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D061114.1 | NSA/MWR/C1 - Rain sensor always on | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D080512.1 | NSA/MWR/C1 - Spikes in air temperature readings | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D080623.1 | NSA/MWR/C1 - Missing surface air temperature data | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D090114.2 | NSA/MWR/C1 - Incorrect brightness temperatures and retrievals | nsa5mwravgC1.c1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D090417.1 | NSA/MWR/C1 - RFI screening test | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D090417.5 | NSA/MWR/C1 - High noise in 23.8-GHz channel | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D090611.1 | NSA/MWR/C1 - Intermittent air temperature readings | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D090611.2 | NSA/MWR/C1 - Air temperature readings missing | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D100326.1 | NSA/MWR/C1 - Elevated noise | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D101025.1 | NSA/MWR/C1 - Missing data | nsamwrtipC1.a1, nsamwrlosC1.b1 |
| D990106.3 | NSA/MWR/C1 - Software Change | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D990205.1 | NSA/MWR/C1 - Wrong azimuth reported | nsamwrtipC1.a1 |
| 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.b1, nsamwrlosC1.a1, nsamwrtipC1.a1 |
| Description: | The wet window flag is set high more than expected. |
| Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| 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.b1, nsamwrlosC1.a1, nsamwrtipC1.a1 |
| Description: | The wet window flag is set high more frequent than expected. |
| Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/31/2001 | 0900 | 02/06/2001 | 0237 |
| Subject: | NSA/MWR/C1 - Reprocess: calibration change |
| DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The computer was replaced but not configured correctly for the MWR. |
| Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/25/2002 | 1930 | 05/27/2002 | 1200 |
| Subject: | NSA/MWR/C1 - REPROCESS: Wrong Calibration |
| DataStreams: | nsamwrlosC1.a1, nsamwrtipC1.a1 |
| Description: | When MWR#20 was returned to service on 4/25/02, the calibration had significantly changed as a result of the repairs made by Radiometrics. I hoped that the previous calibration was close enough to serve as a start of the iterative self-calibration process, but I was wrong. After several days and very little clear sky, no valid tip curves were obtained and the values of vap and liq continued to be too large and unrealistic (resulting in the "******" for these values in the raw file). Radiometrics finally provided the calibration they obtained after the repair and these values were put in the configuration file on 5/23/02. The instrument was then able to obtain valid tip curves and derive a new calibration. |
| Measurements: | nsamwrlosC1.a1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/13/2003 | 1906 | 01/15/2005 | 0054 |
| Subject: | NSA/MWR/C1 - no air temperature signal |
| DataStreams: | nsamwrC1.00, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | When the new blower was upgraded by Radiometrics and reinstalled on the MWR, the air temperature sensor failed to properly report. It was determined that the wires carrying the signal to the analog board did not conform to the standard expected by the upgraded blower. The problem was corrected by changing the wiring and modifying the MWR software to read the signal from the appropriate corresponding channel. |
| Measurements: | nsamwrlosC1.b1:
nsamwrC1.00:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/07/2004 | 2007 | 01/09/2004 | 0032 |
| Subject: | NSA/MWR/C1 - damaged window |
| DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1, nsaqmemwrcolC1.c1 |
| Description: | The MWR dielectric window was damaged by snow from a snow blower and replaced. |
| Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsaqmemwrcolC1.c1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/13/2004 | 1000 | 12/13/2004 | 2330 |
| Subject: | NSA/C1 - Site-wide power failure |
| DataStreams: | nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaeriengineerC1.b1, nsaaerisummaryC1.b1, nsa915rwptempconC1.a1, nsa915rwptempmomC1.a0, nsa915rwptempspecC1.a0, nsa915rwpwindconC1.a1, nsa915rwpwindmomC1.a0, nsa915rwpwindspecC1.a0, nsamettwr4hC1.b1, nsammcrmomC1.b1, nsamplC1.a1, nsamplpsC1.a0, nsamwrlosC1.b1, nsamwrtipC1.a1, nsamwrpC1.b1, nsatwrcam40mC1.a1, nsavceil25kC1.b1 |
| Description: | The Barrow facility experienced a site-wide power failure on 12/13. Power was restored to most instruments between 2250 and 2330 GMT. |
| Measurements: | nsa915rwpwindspecC1.a0:
nsa915rwpwindconC1.a1:
nsaaerich2C1.b1:
nsamwrlosC1.b1:
nsaaerisummaryC1.b1:
nsa915rwptempmomC1.a0:
nsaaerich1C1.b1:
nsamplpsC1.a0:
nsavceil25kC1.b1:
nsa915rwptempspecC1.a0:
nsa915rwptempconC1.a1:
nsaaeriengineerC1.b1:
nsamplC1.a1:
nsammcrmomC1.b1:
nsamettwr4hC1.b1:
nsamwrpC1.b1:
nsa915rwpwindmomC1.a0:
nsamwrtipC1.a1:
nsatwrcam40mC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/15/2005 | 0054 | 01/19/2005 | 1143 |
| Subject: | NSA/MWR/C1 - poor air temperature values |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | After the air temperature sensor was rewired due to a change with the new blower (D030515.3), the measurement was initially incorrect. There is no apparent cause for the bad signal or its improvement. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/25/2002 | 1900 | 06/29/2005 | 0000 |
| Subject: | NSA/MWR/C1 - Reprocess: Revised Calibration Coefficients |
| DataStreams: | nsa5mwravgC1.c1, nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1, nsaqmemwrcolC1.c1 |
| Description: | IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant (1957) liquid water absorption model. Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz (1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption model were developed. The Rosenkranz water vapor absorption model resulted a 2 percent increase in PWV relative to the earlier Liebe and Layton model. The Liebe liquid water absorption model decreased the LWP by 10% relative to the Grant model. However, the increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA). Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz (1998), provided a better fit to the microwave brightness temperature measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which utilizes the HITRAN compilation for its spectroscopic parameters. These new retrievals provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on Rosenkranz (1998). Although the MWR data will be reprocessed to apply the new monortm-based retrievals, for most purposes it will be sufficient to correct the data using the following factors: PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ LWP_MONORTM = 1.026 * LWP_ROSENKRANZ The Rosenkranz-based retrieval coefficients became active at NSA.C1 20020425.1900. The MONORTM-based retrieval coefficients became active at NSA.C1 20050629.0000. Note: a reprocessing effort is already underway to apply the Rosenkranz-based retrieval coefficients to all MWR prior to April 2002. An additional reprocessing task will be undertaken to apply the MONORTM retrieval to all MWR data when the first is completed. Read reprocessing comments in the netcdf file header carefully to ensure you are aware which retrieval is in play. |
| Measurements: | nsa5mwravgC1.c1:
nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsaqmemwrcolC1.c1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/09/2005 | 2354 | 07/20/2005 | 0000 |
| Subject: | NSA/MWR/C1 - Possible loss of accuracy due to missing blower |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | On 7/09 the MWR blower failed. The blower prevents snow and liquid drop from accumulating on the window. Accumulation of snow or liquid results in a loss of accuracy of the instrument. The loss of accuracy has consequencies on the retrieved liquid water path and precipitable water vapor. Usually there will be an overestimation of liquid and vapor. The blower was repaired and reinstalled on 7/20. Between 7/9 and 7/20 the tkair variable is unavailable as well. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/16/2002 | 1820 | 09/15/2005 | 1702 |
| Subject: | NSA/MWR/C1 - New software version (4.15) installed |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | A problem began with the installation of MWR.EXE version 4.12 in September 2002. The software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier problem. The software upgrade corrected the earlier problem but introduced a new one that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these problems. The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/01/2005 | 1945 | 09/06/2005 | 1500 |
| Subject: | NSA/MWR/C1 - Reprocess: wrong calibration |
| DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | When MWR#20 was returned to service on 9/1/2005, the calibration had changed as a result of the repairs made by Radiometrics and the RF deck temperature had been set to 325K for testing. On 9/2, the temperature was decreased to 307K to prevent thermal instability in winter and the calibration was changed in the configuration file with the values supplied on the repair report. The data need to be reprocessed with the calibration coefficients that were automatically derived after these changes were put into affect. They are: tnd_nom23=185.621, tnd_nom31=158.801, tc23=-0.022, tc31=-0.039. |
| Measurements: | nsamwrlosC1.a1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/05/2006 | 1100 | 10/23/2006 | 1600 |
| Subject: | NSA/MWR/C1 - Rain sensor always on |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The rain sensor was always on between 10/5 and 10/23 2006. The user should be aware that not all data flagged as rainy are actually rainy. The problem was caused by a shift in the sensitivity of the rain sensor and was corrected by changing the sensor threshold in the configuration file. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/02/2008 | 0000 | 06/04/2008 | 2200 |
| Subject: | NSA/MWR/C1 - Spikes in air temperature readings |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | During this month there are occasional negative spikes in the Tkair variable. The problem may be corrosion in the temperature sensor or the infiltration of water from melting snow. The dewblower was replaced and a new sensor installed |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/06/2008 | 2200 | 06/20/2008 | 0200 |
| Subject: | NSA/MWR/C1 - Missing surface air temperature data |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | Some wires in the dewblower were not correctly configured. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/09/2008 | 0000 | 12/09/2008 | 1800 |
| Subject: | NSA/MWR/C1 - Incorrect brightness temperatures and retrievals |
| DataStreams: | nsa5mwravgC1.c1, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The brightness temperatures and retrieved PWV and LWP show a sudden jump and have values that are too high. The suddenly jump back to normal at around 1800 UTC. All other parameters seem reasonable so the cause of the jump may just be due to accumulation of either snow or melting ice on the radome. |
| Measurements: | nsa5mwravgC1.c1:
nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/15/2009 | 2100 | 04/15/2009 | 2300 |
| 04/16/2009 | 1715 | 04/16/2009 | 2200 |
| Subject: | NSA/MWR/C1 - RFI screening test |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The instrument was covered with a shield to test the effect on the RF interference that is affecting the measurements since February. The test was performed on 4/15 and 4/16 for a few hours. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/13/2009 | 0000 | 10/15/2009 | 1800 |
| Subject: | NSA/MWR/C1 - High noise in 23.8-GHz channel |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | Starting approximately on February 13 the MWR experienced high level of noise in the 23.8 GHz channel. The spikes became more prominent around Feb 17 and increased after that date as well. The cause of the interference was identified as the nearby MWRP on Oct 13 and the instruments were realigned. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/23/2009 | 0000 | 05/26/2009 | 1900 |
| Subject: | NSA/MWR/C1 - Intermittent air temperature readings |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | Starting on 5/23 the air temperature readings (tkair) were intermittent and had negative spikes |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/26/2009 | 1900 | 06/10/2009 | 2300 |
| Subject: | NSA/MWR/C1 - Air temperature readings missing |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The air temperature readings (tkair) dropped on 5/26. The signal was restored on 6/10. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/10/2010 | 0000 | 02/20/2010 | 2359 |
| Subject: | NSA/MWR/C1 - Elevated noise |
| DataStreams: | nsamwrlosC1.b1, nsamwrtipC1.a1 |
| Description: | The data have high noise levels. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/27/2011 | 1800 | 05/03/2011 | 1900 |
| 05/22/2011 | 1700 | 05/24/2011 | 0000 |
| 07/10/2004 | 2255 | 07/12/2004 | 1918 |
| 08/05/2005 | 1952 | 09/01/2005 | 1945 |
| 09/22/2005 | 0545 | 09/27/2005 | 2357 |
| 02/25/2006 | 0811 | 02/27/2006 | 1827 |
| 09/17/2009 | 2241 | 09/20/2009 | 1734 |
| 09/27/2010 | 0254 | 10/01/2010 | 1924 |
| 08/19/2002 | 1656 | 08/21/2002 | 1925 |
| 12/05/2002 | 2253 | 12/08/2002 | 2120 |
| 06/29/2003 | 1630 | 07/01/2003 | 2233 |
| 08/09/2003 | 0459 | 08/11/2003 | 1807 |
| 02/10/2004 | 0845 | 02/17/2004 | 0156 |
| 08/09/2001 | 0000 | 08/13/2001 | 0000 |
| 08/15/2001 | 0000 | 08/20/2001 | 0000 |
| 12/30/2001 | 2359 | 01/01/2002 | 0000 |
| 02/14/2002 | 2159 | 02/25/2002 | 2009 |
| 02/27/2002 | 0700 | 03/02/2002 | 0100 |
| 04/25/2002 | 1855 | 05/08/2002 | 2138 |
| 05/08/2002 | 2144 | 05/23/2002 | 1925 |
| 02/08/1998 | 1459 | 02/11/1998 | 2254 |
| 02/13/1998 | 1359 | 02/22/1998 | 2022 |
| 03/06/1998 | 1846 | 03/14/1998 | 0200 |
| 03/15/1998 | 2322 | 03/19/1998 | 0053 |
| 04/24/1998 | 1838 | 04/29/1998 | 2340 |
| 05/03/1998 | 1203 | 05/11/1998 | 2137 |
| 05/30/1998 | 1840 | 06/01/1998 | 1858 |
| 06/09/1998 | 2338 | 06/16/1998 | 2243 |
| 07/13/1998 | 0103 | 07/16/1998 | 1816 |
| 07/18/1998 | 1904 | 07/27/1998 | 2133 |
| 07/29/1998 | 0828 | 08/03/1998 | 1901 |
| 08/05/1998 | 0028 | 09/24/1998 | 2042 |
| 09/24/1998 | 2210 | 11/11/1998 | 1830 |
| 11/11/1998 | 1831 | 11/18/1998 | 1929 |
| 01/02/1999 | 0947 | 01/04/1999 | 1756 |
| 10/11/1999 | 2359 | 10/13/1999 | 2200 |
| 11/17/1999 | 0043 | 11/19/1999 | 0033 |
| 01/28/2000 | 1929 | 01/31/2000 | 1754 |
| 12/22/2000 | 2300 | 01/09/2001 | 2233 |
| 03/28/2001 | 2359 | 04/01/2001 | 0001 |
| Subject: | NSA/MWR/C1 - Missing data |
| DataStreams: | nsamwrtipC1.a1, nsamwrlosC1.b1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | nsamwrlosC1.b1:
nsamwrtipC1.a1:
|
| 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 |
|---|---|---|---|
| 03/19/1998 | 0000 | 02/02/1999 | 2250 |
| Subject: | NSA/MWR/C1 - Wrong azimuth reported |
| DataStreams: | nsamwrtipC1.a1 |
| Description: | The MWR was reporting azimuth and actaz values of 0 degrees when in fact the instrument was oriented to 244 degrees. No other data were affected. This has no effect on data at all, it is simply a diagnostic reference. |
| Measurements: | nsamwrtipC1.a1:
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