| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D021017.1 | NSA/MWR/C1 - MWR digital board failure | nsamwrlosC1.a1, nsamwrlosC1.b1 |
| D030312.6 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | nsamwrlosC1.a1, nsamwrlosC1.b1 |
| D030515.3 | NSA/MWR/C1 - no air temperature signal | nsamwrC1.00, nsamwrlosC1.b1, nsamwrtipC1.a1 |
| D030822.7 | NSA/MWR/C1 - min/max/delta values incorrect | nsamwrlosC1.b1 |
| 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 |
| D050920.2 | NSA/MWR/C1 - Instrument problem, Heater problem | nsamwrlosC1.b1, nsamwrC1.00 |
| 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 |
| D051020.1 | NSA/MWR/C1 - Incorrect time stamp | nsamwrC1.00, nsamwrlosC1.b1 |
| D060717.4 | NSA/MWR/C1 - TKAIR sensor failure | nsamwrlosC1.b1 |
| 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 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/04/2002 | 0824 | 03/16/2002 | 0056 |
| Subject: | NSA/MWR/C1 - MWR digital board failure |
| DataStreams: | nsamwrlosC1.a1, nsamwrlosC1.b1 |
| Description: | A power failure at the site apparently damaged some of the components of the digital board. The MWR was replaced with a spare unit and returned to the manufacturer for repair. |
| Measurements: | nsamwrlosC1.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 |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 01/02/1998 | 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 |
|---|---|---|---|
| 01/07/2004 | 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 |
|---|---|---|---|
| 09/13/2005 | 0000 | 10/18/2005 | 2000 |
| Subject: | NSA/MWR/C1 - Instrument problem, Heater problem |
| DataStreams: | nsamwrlosC1.b1, nsamwrC1.00 |
| Description: | The heater of the MWR was ON all the time even when the moisture sensor was dry. Jim Liljegren suspected a problem with the relay that activates the heater. The suggested action was to send the faulty assembly to SGP for repair and get a spare unit from SGP. The spare unit was sent on 9/15 and was installed on 10/18. |
| Measurements: | nsamwrlosC1.b1:
nsamwrC1.00:
|
| 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 |
|---|---|---|---|
| 09/27/2005 | 2200 | 09/30/2005 | 2000 |
| Subject: | NSA/MWR/C1 - Incorrect time stamp |
| DataStreams: | nsamwrC1.00, nsamwrlosC1.b1 |
| Description: | On Sept 27 the motherboard of the MWR computer was replaced. Following the replacement, the date on the computer was not set to the correct time of day, therefore the date and time in the files were wrong. The time on the computer was reset on Sept. 30. Time stamps between Sept. 27 and Sept. 30 were later corrected based on gathered information, however they may have as much as 5 minutes of uncertainty. |
| Measurements: | nsamwrlosC1.b1:
nsamwrC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/14/2006 | 0000 | 07/28/2006 | 0000 |
| Subject: | NSA/MWR/C1 - TKAIR sensor failure |
| DataStreams: | nsamwrlosC1.b1 |
| Description: | Between 7/14 and 7/28 the tkair variable is missing most of the time and sometimes has large negative spikes. On 7/28, the sensor was cleaned of corrosion and the readings came back to normal. |
| Measurements: | nsamwrlosC1.b1:
|
| 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:
|