DQR ID | Subject | Data Streams Affected |
---|---|---|
D030214.1 | SGP/MWR/B4/C1 - LOS cycle skipping | sgpmwrlosC1.b1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosC1.a1 |
D030822.1 | SGP/MWR/C1 - Incorrect min and max values | sgpmwrlosC1.b1 |
D030822.2 | SGP/MWR/B1 - min/max/delta values incorrect | sgpmwrlosB1.b1 |
D030822.3 | SGP/MWR/B4 - min/max/delta values incorrect | sgpmwrlosB4.b1 |
D030822.4 | SGP/MWR/B5 - min/max/delta values incorrect | sgpmwrlosB5.b1 |
D030822.5 | SGP/MWR/B6 - min/max/delta values incorrect | sgpmwrlosB6.b1 |
D030902.1 | SGP/MWR/C1 - no air temperature signal | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D030909.1 | SGP/MWR/B1 - thermal instability | sgpmwrlosB1.a1, sgpmwrlosB1.b1 |
D030909.2 | SGP/MWR/B6 - thermal instability | sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
D030909.3 | SGP/MWR/E14 - thermal instability | sgpmwrlosE14.a1, sgpmwrlosE14.b1 |
D031106.2 | SGP/MWR/B4 - no air temperature signal | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D040210.2 | SGP/MWR/B6 - Heater problem | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D040824.1 | SGP/MWR/C1 - Wet window flag "on" more frequently than expected | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D041001.3 | SGP/MWR/C1 - Instrument problem | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D041014.1 | SGP/MWR/C1 - thermal instability | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D041021.3 | SGP/MWR/B4 - Heater problem | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D041117.1 | SGP/MWR/E14 - Reprocess: wrong retrievals | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
D041117.2 | SGP/MWR/C1 - Reprocess: wrong retrievals | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgpqmemwrcolC1.c1 |
D050203.3 | SGP/MWR/C1 - spare instrument | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D050705.1 | SGP/MWR/E14 - computer problem | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D050722.1 | SGP/MWR/C1 - REPROCESS - Revised Retrieval Coefficients | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgpqmemwrcolC1.c1 |
D050725.2 | SGP/MWR/B1 - Reprocess: Revised Retrieval Coefficients | sgp5mwravgB1.c1, sgpmwrlosB1.a1, sgpmwrlosB1.b1, sgpmwrtipB1.a1, sgpqmemwrcolB1.c1 |
D050725.3 | SGP/MWR/B4 - Reprocess: Revised Retrieval Coefficients | sgp5mwravgB4.c1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1, sgpqmemwrcolB4.c1 |
D050725.4 | SGP/MWR/B5 - Reprocess: Revised Retrieval Coefficients | sgp5mwravgB5.c1, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1, sgpqmemwrcolB5.c1 |
D050725.5 | SGP/MWR/B6 - Reprocess: Revised Retrieval Coefficients | sgp5mwravgB6.c1, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1, sgpqmemwrcolB6.c1 |
D050725.6 | SGP/MWR/E14 - Reprocess: Revised Retrieval Coefficients | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
D050822.2 | SGP/MWR/E14 - Reprocess: thermal instability | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D050822.5 | SGP/MWR/B1 - thermal instability | sgpmwrtipB1.a1, sgpmwrlosB1.b1 |
D050822.6 | SGP/MWR/B1 - Reprocess: mixer temp adjustment | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D050915.1 | SGP/MWR/C1 - Instrument noise problem | sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
D050927.2 | SGP/MWR/B1 - New software version (4.15) installed | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D050927.3 | SGP/MWR/B4 - New software version (4.15) installed | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D050927.4 | SGP/MWR/B5 - New software version (4.15) installed | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D050928.6 | SGP/MWR/B6 - New software version (4.15) installed | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D051011.3 | SGP/MWR/E14 - New software version (4.15) installed | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D051011.6 | SGP/MWR/C1 - New software version (4.15) installed | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D060322.1 | SGP/MWR/E14 - Instrument maintenance | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpmwrE14.00 |
D060420.1 | SGP/MWR/B4 - Reprocess: wrong retrievals | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1, sgpqmemwrcolB4.c1 |
D060420.3 | SGP/MWR/B5 - Reprocess: wrong retrievals | sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1, sgpqmemwrcolB5.c1 |
D060420.4 | SGP/MWR/B6 - Reprocess: wrong retrievals | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1, sgpqmemwrcolB6.c1 |
D060717.2 | SGP/MWR/C1 - Spikes in ambient temperature readings | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D060718.3 | SGP/MWR/B5 - Mixer temp unstable | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D060726.1 | SGP/MWR/B1 - Reprocessed: Corrected calibration | sgpmwrB1.00, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D060726.2 | SGP/MWR/B6 - Reprocessed: Corrected calibration | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D060808.1 | SGP/MWR/B6 - Reprocessed: Corrected calibration | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D061213.5 | SGP/MWR/E14 - Radiometer testing | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D070314.2 | SGP/MWR/C1/E14 - Freezing rain-Incorrect rain flag | sgpmwrlosC1.b1, sgpmwrlosE14.b1, sgpmwrtipC1.a1, sgpmwrtipE14.a1 |
D070406.2 | SGP/MWR/E14 - Power supply failure | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D070801.1 | SGP/MWR/B1 - 23.8-GHz brightness temperature slightly high | sgp5mwravgB1.c1, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D070802.3 | SGP/MWR/C1 - Noisy data | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D070802.4 | SGP/MWR/E14 - Bias in 23.8-GHz measurements | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D071011.3 | SGP/MWR/B6 - Incorrect rain flag | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D071011.4 | SGP/MWR/B5 - Intermittent missing data | sgpmwrtipB5.a1, sgpmwrlosB5.b1 |
D071128.2 | SGP/MWR/C1 - Reprocess: Radiometer reinstalled- Please reprocess | sgp5mwravgC1.c1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D071129.1 | SGP/MWR/B1 - Calibration failure | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D071210.1 | SGP/MWR/B6 - Incorrect mixer kinetic temperature | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D080103.2 | SGP/MWR/C1 - Missing data | sgpmwrlosC1.b1 |
D080410.3 | SGP/MWR/B5 - Some rain events flagged | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D080522.2 | SGP/MWR/B6 - Reprocessed: Re-calibration | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D080701.2 | SGP/MWR/B4 - Missing data | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D080724.1 | SGP/MWR/B5 - Missing data | sgpmwrlosB5.b1 |
D080811.2 | SGP/MWR/B1 - Thermal instability-- Missing data | sgp5mwravgB1.c1, sgpmwrB1.00, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D081013.5 | SGP/MWR/C1 - Increased noise in 31.4 GHz channel | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D090114.7 | SGP/MWR/B1 - Noisy data | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D090115.2 | SGP/MWR/B4 - Occasional spikes in data | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D090202.4 | SGP/MWR/B1 - Missing data | sgpmwrlosB1.b1 |
D090225.11 | SGP/MWR/B6 - Loss of thermal stabilization | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D090225.7 | SGP/MWR/B1 - Noisy data | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D090512.5 | SGP/MWR/B1 - Increased noise level | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
D090720.3 | SGP/MWR/B6 - Missing data | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/31/2002 | 2034 | 11/05/2002 | 1815 |
Subject: | SGP/MWR/B4/C1 - LOS cycle skipping |
DataStreams: | sgpmwrlosC1.b1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosC1.a1 |
Description: | When MWR software version 4.12 was installed at the SGP, it was observed that the MWRs at CF and BF4 skip line-of-sight (LOS) observing cycles. In LOS mode, the software begins an observing cycle at 0, 20, and 40 seconds after the minute to provide 3 LOS cycles per minute. If a cycle is delayed so that it takes more than 20 seconds to complete, then the next start time is missed, the cycle is skipped, and the data that would have been acquired are lost. It was demonstrated that the interaction with the IRT at CF slowed the MWR observing cycle noticeably and contributed significantly to the LOS cycle skipping. The IRT was removed from the MWR on 5 November 2002 and the LOS cycle skipping at the CF was resolved. The IRT data are now available in a new separate datastream: sgpirtC1.a1 (and soon sgpirt2sC1.a1). The BF4 cycle skipping may have resulted from a combination of an additional air temperature sensor on this instrument and the use of a fiber optic cable. However, the cycle skipping on this instrument appears to have abated without modifications to the instrument configuration. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/18/2002 | 0000 | 02/10/2003 | 2359 |
Subject: | SGP/MWR/C1 - Incorrect min and max values |
DataStreams: | sgpmwrlosC1.b1 |
Description: | The values of valid_min and valid_max applied to fields tkxc and tknd were incorrect. They should be 303 and 333, respectively. |
Measurements: | sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 01/24/2003 | 1659 |
Subject: | SGP/MWR/B1 - min/max/delta values incorrect |
DataStreams: | sgpmwrlosB1.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: | sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 02/10/2003 | 2359 |
Subject: | SGP/MWR/B4 - min/max/delta values incorrect |
DataStreams: | sgpmwrlosB4.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: | sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/16/1998 | 0000 | 02/10/2003 | 2359 |
Subject: | SGP/MWR/B5 - min/max/delta values incorrect |
DataStreams: | sgpmwrlosB5.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: | sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0000 | 02/10/2003 | 2359 |
Subject: | SGP/MWR/B6 - min/max/delta values incorrect |
DataStreams: | sgpmwrlosB6.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: | sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/22/2003 | 2115 | 09/30/2004 | 1835 |
Subject: | SGP/MWR/C1 - no air temperature signal |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.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. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/03/2003 | 0000 | 08/27/2003 | 2359 |
Subject: | SGP/MWR/B1 - thermal instability |
DataStreams: | sgpmwrlosB1.a1, sgpmwrlosB1.b1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. |
Measurements: | sgpmwrlosB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/14/2003 | 0000 | 08/27/2003 | 2359 |
Subject: | SGP/MWR/B6 - thermal instability |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. |
Measurements: | sgpmwrlosB6.a1:
sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/11/2003 | 0000 | 08/28/2003 | 2359 |
Subject: | SGP/MWR/E14 - thermal instability |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. |
Measurements: | sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2003 | 1741 | 12/23/2004 | 2025 |
Subject: | SGP/MWR/B4 - no air temperature signal |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.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: | sgpmwrtipB4.a1:
sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/20/2004 | 2235 | 02/17/2004 | 2243 |
Subject: | SGP/MWR/B6 - Heater problem |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | When the heater/blower was replaced, the wet_window flag was constantly set high because the "moisture threshold voltage" value in the configuration file was not changed. The value was corrected for the new heater and the constant flagging stopped. |
Measurements: | sgpmwrlosB6.a1:
sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/1999 | 0000 | 12/21/1999 | 2359 |
11/10/2000 | 0000 | 12/08/2000 | 2359 |
01/26/2001 | 0000 | 03/05/2001 | 2359 |
12/18/2001 | 0000 | 12/31/2001 | 2359 |
02/11/2002 | 0000 | 02/28/2002 | 2359 |
02/19/2003 | 0000 | 03/26/2003 | 2359 |
10/15/2003 | 0000 | 11/03/2003 | 2359 |
Subject: | SGP/MWR/C1 - Wet window flag "on" more frequently than expected |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
Description: | The wet window flag was set "on" more frequently than expected during the time periods specified. This indicates the heater has been running more than necessary. In most instances the moisture sensitivity was adjusted at the end of these periods. |
Measurements: | sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/2004 | 2114 | 09/24/2004 | 1354 |
09/26/2004 | 2332 | 09/27/2004 | 0317 |
09/27/2004 | 1214 | 09/30/2004 | 1820 |
Subject: | SGP/MWR/C1 - Instrument problem |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | The MWR mixer temperature, blackbody temperature, and moisture flag are incorrect. This began when the instrument was returned to service after the analog board was temporarily removed to check the presence and absence of certain resistors. The board must have been accidently damaged during this process. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2004 | 1835 | 10/13/2004 | 2118 |
Subject: | SGP/MWR/C1 - thermal instability |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | The analog board was replaced with a spare (D041001.3) with a reference temperature that was set too low (306 K) so that during periods of high ambient temperature, the instrument became thermally unstable. The problem was corrected when the temperature setting was increased (to 311 K). |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/10/2004 | 1930 | 11/23/2004 | 1720 |
Subject: | SGP/MWR/B4 - Heater problem |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | The heater does not appear to be operating properly when moisture is detected. The problem was corrected by adjusting the heater sensivity. |
Measurements: | sgpmwrtipB4.a1:
sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/24/2004 | 1945 | 11/11/2004 | 2000 |
Subject: | SGP/MWR/E14 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
Description: | When MWR#04 was installed at EF14 (replacing MWR#33), out-of-date retrieval coefficients were used in the configuration file. The correct coefficients were applied when the computer, software, and configuration file were upgraded. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
sgpqmemwrcolE14.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/2004 | 1643 | 11/11/2004 | 2100 |
Subject: | SGP/MWR/C1 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgpqmemwrcolC1.c1 |
Description: | When the computer and core configuration were upgraded, retrieval coefficients for BF1 were accidently included in the configuration file. The correct coefficients for CF1 were applied when the configuration file was updated. |
Measurements: | sgpmwrtipC1.a1:
sgpqmemwrcolC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2003 | 1558 | 08/22/2003 | 2059 |
Subject: | SGP/MWR/C1 - spare instrument |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | The spare MWR, S.N. 04, was installed while the production instrument, S.N. 10, was returned to the manufacturer for upgrades. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/29/2005 | 0000 | 08/09/2005 | 1847 |
Subject: | SGP/MWR/E14 - computer problem |
DataStreams: | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | The computer was operating sporadically, requiring frequent reboots and resulting in periods of missing data. A warranty replacement of the motherboard corrected the problem. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2002 | 2000 | 06/28/2005 | 2300 |
Subject: | SGP/MWR/C1 - REPROCESS - Revised Retrieval Coefficients |
DataStreams: | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgpqmemwrcolC1.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 as follows (BCR 456): SGP/C1 (Lamont) 4/16/2002, 2000 SGP/B1 (Hillsboro) 4/12/2002, 1600 SGP/B4 (Vici) 4/15/2002, 2300 SGP/B5 (Morris) 4/15/2002, 2300 SGP/B6 (Purcell) 4/16/2002, 2200 SGP/E14(Lamont) 4/16/2002, 0000 NSA/C1 (Barrow) 4/25/2002, 1900 NSA/C2 (Atqasuk) 4/18/2002, 1700 TWP/C1 (Manus) 5/04/2002, 0200 TWP/C2 (Nauru) 4/27/2002, 0600 TWP/C3 (Darwin) inception The MONORTM-based retrieval coefficients became active as follows (BCR 984): SGP/C1 (Lamont) 6/28/2005, 2300 SGP/B1 (Hillsboro) 6/24/2005, 2100 SGP/B4 (Vici) 6/24/2005, 2100 SGP/B5 (Morris) 6/24/2005, 2100 SGP/B6 (Purcell) 6/24/2005, 1942 SGP/E14(Lamont) 6/28/2005, 2300 NSA/C1 (Barrow) 6/29/2005, 0000 NSA/C2 (Atqasuk) 6/29/2005, 0000 TWP/C1 (Manus) 6/30/2005, 2100 TWP/C2 (Nauru) 6/30/2005, 2100 TWP/C3 (Darwin) 6/30/2005, 2100 PYE/M1 (Pt. Reyes) 4/08/2005, 1900** ** At Pt. Reyes, the original retrieval coefficients implemented in March 2005 were based on a version of the Rosenkranz model that had been modified to use the HITRAN half-width at 22 GHz and to be consistent with the water vapor continuum in MONORTM. These retrievals yield nearly identical results to the MONORTM retrievals. Therefore the Pt. Reyes data prior to 4/08/2005 may not require reprocessing. |
Measurements: | sgp5mwravgC1.c1:
sgpmwrtipC1.a1:
sgpqmemwrcolC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2002 | 1600 | 06/24/2005 | 2100 |
Subject: | SGP/MWR/B1 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgp5mwravgB1.c1, sgpmwrlosB1.a1, sgpmwrlosB1.b1, sgpmwrtipB1.a1, sgpqmemwrcolB1.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 SGP.B1 20020412.1600. The MONORTM-based retrieval coefficients became active at SGP.B1 20050624.2100. 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: | sgpmwrlosB1.a1:
sgp5mwravgB1.c1:
sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
sgpqmemwrcolB1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2002 | 2300 | 06/24/2005 | 2100 |
Subject: | SGP/MWR/B4 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgp5mwravgB4.c1, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1, sgpqmemwrcolB4.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 SGP.B4 20020415.2300. The MONORTM-based retrieval coefficients became active at SGP.B4 20050624.2100. 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: | sgp5mwravgB4.c1:
sgpmwrtipB4.a1:
sgpqmemwrcolB4.c1:
sgpmwrlosB4.b1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2002 | 2300 | 06/24/2005 | 2100 |
Subject: | SGP/MWR/B5 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgp5mwravgB5.c1, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1, sgpqmemwrcolB5.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 SGP.B5 20020415.2300. The MONORTM-based retrieval coefficients became active at SGP.B5 20050624.2100. 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: | sgp5mwravgB5.c1:
sgpmwrlosB5.a1:
sgpmwrlosB5.b1:
sgpqmemwrcolB5.c1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2002 | 2200 | 06/24/2005 | 1942 |
Subject: | SGP/MWR/B6 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgp5mwravgB6.c1, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1, sgpqmemwrcolB6.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 SGP.B6 20020416.2200. The MONORTM-based retrieval coefficients became active at SGP.B6 20050624.1942. 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: | sgpmwrlosB6.a1:
sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
sgp5mwravgB6.c1:
sgpqmemwrcolB6.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2002 | 0000 | 06/28/2005 | 2300 |
Subject: | SGP/MWR/E14 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.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 SGP.E14 20020416.0000. The MONORTM-based retrieval coefficients became active at SGP.E14 20050628.2300. 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: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
sgpqmemwrcolE14.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2005 | 1828 | 08/02/2005 | 2002 |
Subject: | SGP/MWR/E14 - Reprocess: thermal instability |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. The problem was corrected by increasing the RF deck temperature from 50 to 56 C. The data will need to be reprocessed with calibration coefficients derived after the reference temperature, tkmx, was adjusted. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2005 | 1800 | 08/05/2005 | 1935 |
Subject: | SGP/MWR/B1 - thermal instability |
DataStreams: | sgpmwrtipB1.a1, sgpmwrlosB1.b1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. The problem was corrected by increasing the RF deck temperature from 50 to 52 C. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 2004 | 08/07/2005 | 0555 |
Subject: | SGP/MWR/B1 - Reprocess: mixer temp adjustment |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The RF deck temperature was increased from 50 to 52 C to prevent thermal instability in summer. This resulted in a change in the calibration. The data need to be reprocessed with the calibration coefficients that were automatically derived after the reference temperature, tkmx, was adjusted. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/28/2005 | 1400 | 08/05/2005 | 1700 |
Subject: | SGP/MWR/C1 - Instrument noise problem |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
Description: | Various variables including the mixer temperatures were very noisy. After several attempts to fix the problem, the instrument was taken off line and returned to the manufacturer for repair. |
Measurements: | sgp5mwravgC1.c1:
sgpmwrtipC1.a1:
sgp1mwravgC1.c1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/16/2002 | 2200 | 09/13/2005 | 1806 |
Subject: | SGP/MWR/B1 - New software version (4.15) installed |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in July 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 9/13/2005 at 21:25. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2002 | 1700 | 09/13/2005 | 2121 |
Subject: | SGP/MWR/B4 - New software version (4.15) installed |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in July 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 9/13/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrtipB4.a1:
sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2002 | 1700 | 09/13/2005 | 2124 |
Subject: | SGP/MWR/B5 - New software version (4.15) installed |
DataStreams: | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in July 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 9/13/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrlosB5.b1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2002 | 2100 | 09/23/2005 | 2246 |
Subject: | SGP/MWR/B6 - New software version (4.15) installed |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in July 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 9/23/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2002 | 1458 | 08/01/2005 | 2306 |
Subject: | SGP/MWR/E14 - New software version (4.15) installed |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in May 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 8/1/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/31/2002 | 2027 | 08/04/2005 | 1959 |
Subject: | SGP/MWR/C1 - New software version (4.15) installed |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in July 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 08/04/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2006 | 2200 | 03/29/2006 | 2100 |
Subject: | SGP/MWR/E14 - Instrument maintenance |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpmwrE14.00 |
Description: | The MWR teflon cover was replaced with an old one that is not hydrophobic. This affected the measurements during and immediately after rain. A new teflon window was placed on 3/29 |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/28/2004 | 1729 | 11/23/2004 | 1713 |
Subject: | SGP/MWR/B4 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1, sgpqmemwrcolB4.c1 |
Description: | When the computer and core configuration were upgraded, retrieval coefficients for BF1 were accidently included in the configuration file. The correct coefficients for BF4 were applied when the software was upgraded to ver. 4.14 and the configuration file was updated. |
Measurements: | sgpmwrtipB4.a1:
sgpqmemwrcolB4.c1:
sgpmwrlosB4.b1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/12/2004 | 1725 | 11/12/2004 | 1903 |
Subject: | SGP/MWR/B5 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1, sgpqmemwrcolB5.c1 |
Description: | When the computer and core configuration were upgraded, retrieval coefficients for BF1 were accidently included in the configuration file. The correct coefficients for BF5 were applied when the software was upgraded to ver. 4.14 and the configuration file was updated. |
Measurements: | sgpmwrlosB5.a1:
sgpmwrlosB5.b1:
sgpqmemwrcolB5.c1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2004 | 1624 | 11/23/2004 | 2142 |
Subject: | SGP/MWR/B6 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1, sgpqmemwrcolB6.c1 |
Description: | When the computer and core configuration were upgraded, retrieval coefficients for BF1 were accidently included in the configuration file. The correct coefficients for BF6 were applied when the software was upgraded to ver. 4.14 and the configuration file was updated. |
Measurements: | sgpmwrlosB6.a1:
sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
sgpqmemwrcolB6.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/13/2006 | 1200 | 07/28/2006 | 1600 |
Subject: | SGP/MWR/C1 - Spikes in ambient temperature readings |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | There are intermittent spikes in the Tkair temperature (T ~ 400 K). On 7/28 the sensor was cleaned and the instrument power cycled following a power outage. Readings came back to normal. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/01/2006 | 0000 | 08/21/2006 | 1100 |
Subject: | SGP/MWR/B5 - Mixer temp unstable |
DataStreams: | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | The radiometer mixer temperature was unstable during this time interval. The instability will slightly affect calibration. On 8/21, the instrument was sent to the vendor for repair. June and July data are suspect, the calibration may be slightly incorrect. August data should not be used. |
Measurements: | sgpmwrlosB5.b1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/16/2006 | 0000 | 07/22/2006 | 0600 |
Subject: | SGP/MWR/B1 - Reprocessed: Corrected calibration |
DataStreams: | sgpmwrB1.00, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The radiometer was thermally unstable. Calibration coefficients for the time interval were re-derived after screening for bad values of TKxc and the data were reprocessed. Reprocessed MWRLOS data were archived January 2007. MWRTIP data will not be reprocessed. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrB1.00:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2006 | 1546 | 07/22/2006 | 1700 |
Subject: | SGP/MWR/B6 - Reprocessed: Corrected calibration |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The instrument was overheating so the radiometer temperature set point was increased from 52 C to 56.5 C. The period between 7/20 and 7/22 has been reprocessed with corrected calibration coefficients. Reprocessed MWRLOS data were archived January 2007. MWRTIP data will not be reprocessed. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/15/2006 | 1900 | 08/18/2006 | 0800 |
Subject: | SGP/MWR/B6 - Reprocessed: Corrected calibration |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The instrument was overheating so the radiometer temperature set point was increased from 56.3 C to 57.8 C. The data have been reprocessed with corrected calibration coefficients. Reprocessed MWRLOS data were archived January 2007. MWRTIP data will not be reprocessed. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/2006 | 2100 | 12/01/2006 | 1900 |
Subject: | SGP/MWR/E14 - Radiometer testing |
DataStreams: | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | The radiometer was removed and taken inside for testing |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2007 | 0000 | 01/15/2007 | 0000 |
Subject: | SGP/MWR/C1/E14 - Freezing rain-Incorrect rain flag |
DataStreams: | sgpmwrlosC1.b1, sgpmwrlosE14.b1, sgpmwrtipC1.a1, sgpmwrtipE14.a1 |
Description: | Between 01/12 and 01/15 brightness temperatures show high values (Tb > 100 K) indicative of rain, however the wet_window flag is 0 (indicative of no rain). During that time there where freezing conditions with ice pellets that were not detected by the sensor. The high brightness temperatures may be due to melting ice on the window. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrtipC1.a1:
sgpmwrlosE14.b1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/20/2007 | 0400 | 06/05/2007 | 2000 |
Subject: | SGP/MWR/E14 - Power supply failure |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | On 3/20 the instrument suffered a power supply failure and was removed for repairs |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/2007 | 1600 | 10/16/2009 | 0300 |
Subject: | SGP/MWR/B1 - 23.8-GHz brightness temperature slightly high |
DataStreams: | sgp5mwravgB1.c1, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The radiometer was refurbished and tested at the central facility in 2007. During testing the 23.8-GHz brightness temperature was found to be about 1.5 K higher than the measurements of the C1 radiometer. On 6/19/07 the radiometer was installed at BF1. A comparison with model calculation showed that the measured 23.8-GHz brightness temperature is slightly higher than the model. This offset will affect the PWV retrieval that is on an average about 1.3 mm higher than the radiosonde measurements. The rms error of the retrieved PWV is about 1 mm higher than specified in the netcdf file. On 10/16/2009 the radiometer was removed because of shut down of the boundary facility. |
Measurements: | sgp5mwravgB1.c1:
sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/14/2007 | 0000 | 08/03/2007 | 1508 |
Subject: | SGP/MWR/C1 - Noisy data |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | Since 7/14 the MWR is experiencing intermittent periods of increased noise. The cause for this is under investigation. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/05/2007 | 2000 | 04/26/2009 | 0830 |
Subject: | SGP/MWR/E14 - Bias in 23.8-GHz measurements |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | Since the instrument was returned after a power supply failure the 23.8-GHz channel is constantly 3 K higher than the other co-located radiometer (C1). Since the instrument was just returned after extensive refurbishing at the manufacturer the cause of the bias is not clear. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/29/2007 | 0000 | 10/25/2007 | 1506 |
Subject: | SGP/MWR/B6 - Incorrect rain flag |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The rain flag indicator is coming up too often. On 9/11 the SGP technicians checked and adjusted the rain sensor sensitivity. The operation seemed successful, bu on 9/18 the flag indicator came back up and stayed on too much since. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/02/2007 | 1500 | 04/01/2008 | 0000 |
Subject: | SGP/MWR/B5 - Intermittent missing data |
DataStreams: | sgpmwrtipB5.a1, sgpmwrlosB5.b1 |
Description: | Starting on 9/2/07 data have been intermittent due to frequent software crash. Large chunks (several days in duration) of data are missing. In March 2008 the fiber optics connections were checked and several faulty points were identified. The connections were repaired. Since then the instances of software crashes are much reduced. |
Measurements: | sgpmwrlosB5.b1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/19/2007 | 2136 | 11/22/2007 | 1400 |
Subject: | SGP/MWR/C1 - Reprocess: Radiometer reinstalled- Please reprocess |
DataStreams: | sgp5mwravgC1.c1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | After the radiometer was reinstalled it had to update the calibration coefficients. Data will be reprocessed |
Measurements: | sgp5mwravgC1.c1:
sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2007 | 0000 | 11/26/2007 | 1733 |
Subject: | SGP/MWR/B1 - Calibration failure |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The radiometer suddenly stopped performing successful tip curve calibrations. Brightness temperatures are inaccurate during this time. The instrument was removed from service 20071126. Reprocessing is not possible. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2007 | 1800 | 01/12/2009 | 1700 |
Subject: | SGP/MWR/B6 - Incorrect mixer kinetic temperature |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The mixer kinetic temperature values are incorrect. The mixer temp sensor was on an open circuit. This is a diagnostic variable. The noise diode mount temperature Tknd can be used to monitor the thermal stabilization of the instrument |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/04/1996 | 1910 | 09/08/1996 | 2359 |
09/14/1996 | 0700 | 09/16/1996 | 1759 |
09/30/1996 | 0000 | 09/30/1996 | 2359 |
12/01/1996 | 0000 | 12/01/1996 | 2359 |
07/01/1997 | 0000 | 07/01/1997 | 2359 |
02/20/1998 | 2339 | 02/22/1998 | 0042 |
05/04/1998 | 0000 | 05/04/1998 | 2359 |
07/18/1998 | 0337 | 07/20/1998 | 1355 |
09/28/1998 | 0000 | 09/28/1998 | 2359 |
10/10/1998 | 2359 | 10/12/1998 | 1959 |
10/17/1998 | 1705 | 10/19/1998 | 1535 |
12/25/1998 | 2233 | 12/28/1998 | 2026 |
02/06/1999 | 1235 | 02/08/1999 | 1652 |
03/13/1999 | 2048 | 03/15/1999 | 2040 |
07/23/1999 | 2059 | 07/26/1999 | 1408 |
12/04/1999 | 0800 | 12/06/1999 | 1821 |
01/07/2000 | 1446 | 02/02/2000 | 2224 |
05/24/2000 | 1455 | 05/31/2000 | 1505 |
06/06/2000 | 1620 | 06/14/2000 | 1451 |
09/01/2000 | 2200 | 09/05/2000 | 1526 |
09/15/2000 | 2057 | 09/18/2000 | 1339 |
09/23/2000 | 1236 | 09/25/2000 | 1430 |
01/13/2001 | 2011 | 01/16/2001 | 1647 |
02/24/2001 | 0230 | 02/26/2001 | 1508 |
03/03/2001 | 0701 | 03/05/2001 | 1546 |
03/10/2001 | 0702 | 03/12/2001 | 1535 |
03/17/2001 | 0702 | 03/19/2001 | 1422 |
03/24/2001 | 0703 | 03/26/2001 | 1516 |
03/30/2001 | 2038 | 04/02/2001 | 1423 |
05/05/2001 | 1042 | 05/07/2001 | 1514 |
05/18/2001 | 1534 | 05/21/2001 | 1451 |
06/22/2001 | 2200 | 06/25/2001 | 1438 |
06/30/2001 | 0616 | 07/02/2001 | 1435 |
07/28/2001 | 1944 | 07/30/2001 | 1357 |
08/24/2001 | 1348 | 08/27/2001 | 1751 |
09/07/2001 | 1842 | 09/10/2001 | 1439 |
09/15/2001 | 1533 | 09/17/2001 | 1459 |
10/13/2001 | 0033 | 10/15/2001 | 1526 |
11/03/2001 | 0840 | 11/05/2001 | 1613 |
11/10/2001 | 0558 | 11/13/2001 | 1518 |
11/16/2001 | 1701 | 11/19/2001 | 1706 |
07/21/1993 | 1809 | 07/23/1993 | 1541 |
08/07/1993 | 2143 | 08/09/1993 | 1308 |
08/14/1993 | 2233 | 08/16/1993 | 1300 |
08/29/1993 | 1207 | 08/31/1993 | 1206 |
09/17/1993 | 2158 | 09/20/1993 | 1311 |
10/02/1993 | 1612 | 10/04/1993 | 1338 |
10/09/1993 | 0741 | 10/11/1993 | 1319 |
11/12/1993 | 1207 | 11/15/1993 | 1413 |
11/19/1993 | 2027 | 11/21/1993 | 1957 |
12/14/1993 | 2300 | 03/21/1994 | 1759 |
03/28/1994 | 1459 | 03/30/1994 | 2225 |
05/16/1994 | 1900 | 05/19/1994 | 2018 |
06/22/1994 | 1600 | 07/11/1994 | 1859 |
07/16/1994 | 0300 | 07/19/1994 | 2006 |
09/03/1994 | 1647 | 09/05/1994 | 1341 |
09/09/1994 | 2325 | 09/11/1994 | 1543 |
12/17/1994 | 0049 | 12/19/1994 | 1441 |
01/05/1995 | 0000 | 01/05/1995 | 2359 |
01/28/1995 | 0054 | 01/30/1995 | 1443 |
04/01/1995 | 0000 | 04/03/1995 | 1610 |
05/09/1995 | 2200 | 05/11/1995 | 2350 |
06/24/1995 | 0903 | 06/26/1995 | 0159 |
07/07/1995 | 1625 | 07/10/1995 | 1409 |
07/19/1995 | 1741 | 07/21/1995 | 1906 |
07/28/1995 | 1900 | 07/31/1995 | 1918 |
08/22/1995 | 1616 | 08/25/1995 | 2359 |
12/01/1995 | 1434 | 01/11/1996 | 2214 |
01/12/1996 | 2000 | 01/23/1996 | 2030 |
01/23/1996 | 2332 | 02/08/1996 | 2359 |
08/06/1996 | 0000 | 08/06/1996 | 2359 |
02/25/2006 | 0730 | 02/27/2006 | 1420 |
07/01/2006 | 2225 | 07/03/2006 | 1413 |
11/28/2006 | 2143 | 12/01/2006 | 1911 |
06/09/2007 | 1150 | 06/11/2007 | 1300 |
07/07/2007 | 1642 | 07/09/2007 | 1304 |
08/03/2007 | 1601 | 11/19/2007 | 2135 |
12/22/2007 | 2112 | 12/24/2007 | 1504 |
05/25/2008 | 1815 | 05/27/2008 | 1335 |
06/06/2008 | 1512 | 06/09/2008 | 0238 |
05/08/2009 | 1535 | 05/11/2009 | 1254 |
10/30/2010 | 0400 | 11/01/2010 | 1200 |
09/24/2011 | 1900 | 09/26/2011 | 1600 |
02/03/2006 | 1903 | 02/06/2006 | 1533 |
01/21/2006 | 0708 | 01/23/2006 | 1515 |
12/03/2004 | 1940 | 12/06/2004 | 1454 |
01/15/2005 | 0652 | 01/18/2005 | 1446 |
01/22/2005 | 1449 | 01/24/2005 | 1444 |
06/10/2005 | 2118 | 06/13/2005 | 1603 |
08/05/2005 | 1701 | 08/30/2005 | 2001 |
10/07/2005 | 1658 | 11/16/2005 | 1945 |
11/18/2005 | 1801 | 11/21/2005 | 1521 |
11/23/2005 | 2201 | 11/25/2005 | 1550 |
11/26/2005 | 0101 | 11/28/2005 | 1543 |
12/03/2005 | 1043 | 12/05/2005 | 1559 |
01/14/2006 | 1822 | 01/17/2006 | 1512 |
10/09/2004 | 0745 | 10/11/2004 | 1739 |
10/16/2004 | 2250 | 10/18/2004 | 1355 |
11/13/2004 | 1849 | 11/15/2004 | 1521 |
08/09/2003 | 0037 | 08/11/2003 | 1456 |
08/23/2003 | 2101 | 08/25/2003 | 1456 |
10/12/2003 | 2025 | 10/14/2003 | 1414 |
11/29/2003 | 1840 | 12/01/2003 | 1502 |
01/24/2004 | 0743 | 01/26/2004 | 1505 |
02/14/2004 | 2316 | 02/17/2004 | 1520 |
09/04/2004 | 0250 | 09/07/2004 | 1419 |
01/04/2003 | 0703 | 01/06/2003 | 1529 |
03/02/2002 | 0339 | 03/04/2002 | 1533 |
03/09/2002 | 0340 | 03/11/2002 | 1621 |
06/26/2002 | 1639 | 06/28/2002 | 2057 |
09/01/2002 | 1002 | 09/03/2002 | 1332 |
12/21/2002 | 1124 | 12/23/2002 | 1510 |
12/21/2001 | 2153 | 12/24/2001 | 1442 |
01/30/2002 | 0845 | 02/11/2002 | 1632 |
Subject: | SGP/MWR/C1 - Missing data |
DataStreams: | sgpmwrlosC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/18/2008 | 0600 | 03/19/2008 | 0500 |
Subject: | SGP/MWR/B5 - Some rain events flagged |
DataStreams: | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | March 18 there was a strong rain event. During this time the brightness temperatures where > 100 K due to water accumulating on the radiometer, however the wet window flag indicator was not tripped. Users should not rely on the wet window flag to screen rain-contaminated data. Instead, apply a brightness temperature threshold of 100 K instead to both channels. |
Measurements: | sgpmwrlosB5.b1:
sgpmwrtipB5.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/2008 | 1300 | 04/15/2008 | 1300 |
Subject: | SGP/MWR/B6 - Reprocessed: Re-calibration |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | There was a slight change in the calibration of the instrument after it recovered from a data outage. Data were reprocessed with the following calibration coefficients: Tnd23_nom = 238.29; Tc23 = 0.024 Tnd31_nom = 221.78; Tc31 = 0.013 The reprocessed data were archived June 2008. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2005 | 1344 | 10/28/2005 | 1537 |
10/28/2005 | 2356 | 10/31/2005 | 1756 |
11/05/2005 | 0214 | 11/07/2005 | 1529 |
11/17/2005 | 1517 | 06/11/2007 | 1855 |
05/27/2008 | 0429 | 06/03/2008 | 1714 |
10/03/2008 | 0520 | 10/06/2008 | 1205 |
10/31/2008 | 1413 | 11/03/2008 | 1318 |
Subject: | SGP/MWR/B4 - Missing data |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrtipB4.a1:
sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/10/2001 | 1957 | 11/12/2001 | 1629 |
01/27/2003 | 1413 | 01/31/2003 | 1734 |
03/03/2003 | 1130 | 03/05/2003 | 1904 |
06/14/2003 | 2229 | 06/19/2003 | 1548 |
08/18/2003 | 1131 | 08/20/2003 | 1700 |
10/08/2003 | 0703 | 10/10/2003 | 1545 |
10/10/2003 | 1624 | 10/15/2003 | 1622 |
10/15/2003 | 1700 | 10/17/2003 | 1618 |
12/24/2003 | 2341 | 12/26/2003 | 1741 |
02/16/2004 | 1131 | 02/18/2004 | 1844 |
03/31/2004 | 1917 | 05/07/2004 | 1703 |
09/13/2004 | 1130 | 09/15/2004 | 1559 |
11/13/2004 | 2032 | 11/15/2004 | 1757 |
11/24/2004 | 1834 | 11/26/2004 | 1729 |
12/04/2004 | 1344 | 12/06/2004 | 1846 |
12/25/2004 | 1825 | 12/27/2004 | 1434 |
07/09/2005 | 1114 | 07/11/2005 | 1313 |
03/28/1998 | 1959 | 04/08/1998 | 1626 |
07/07/1998 | 1959 | 07/15/1998 | 1823 |
07/18/1998 | 1900 | 07/29/1998 | 1944 |
09/04/1998 | 1859 | 09/09/1998 | 1848 |
12/15/1998 | 2153 | 12/17/1998 | 1926 |
01/17/1999 | 0549 | 01/19/1999 | 1829 |
06/23/1999 | 1429 | 06/25/1999 | 1945 |
07/23/1999 | 1900 | 07/27/1999 | 1537 |
07/27/1999 | 1759 | 07/29/1999 | 2153 |
07/30/1999 | 1900 | 08/01/1999 | 1453 |
09/11/1999 | 0616 | 09/13/1999 | 1456 |
09/13/1999 | 1700 | 09/15/1999 | 2130 |
09/17/1999 | 1303 | 10/27/1999 | 1716 |
10/24/2005 | 1043 | 10/26/2005 | 1623 |
11/01/2005 | 0911 | 11/09/2005 | 1946 |
11/10/2005 | 0356 | 11/23/2005 | 1440 |
11/29/2005 | 0924 | 12/06/2005 | 1749 |
12/06/2005 | 2100 | 12/09/2005 | 1736 |
12/09/2005 | 2333 | 12/12/2005 | 1429 |
08/21/2006 | 1800 | 06/11/2007 | 1953 |
09/02/2007 | 1451 | 09/07/2007 | 1540 |
02/18/2000 | 1700 | 02/21/2000 | 1522 |
09/01/2000 | 2000 | 09/05/2000 | 1636 |
12/26/2000 | 2343 | 01/02/2001 | 1713 |
01/12/2001 | 1900 | 01/15/2001 | 1542 |
Subject: | SGP/MWR/B5 - Missing data |
DataStreams: | sgpmwrlosB5.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/09/2008 | 0400 | 07/11/2008 | 1600 |
07/12/2008 | 0900 | 07/14/2008 | 1400 |
Subject: | SGP/MWR/B1 - Thermal instability-- Missing data |
DataStreams: | sgp5mwravgB1.c1, sgpmwrB1.00, sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The radiometer had problem keeping the thermal stabilization when the ambient temperature exceeded 34.5 degree C. Data are missing during the times indicated. |
Measurements: | sgpmwrtipB1.a1:
sgp5mwravgB1.c1:
sgpmwrB1.00:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2008 | 0000 | 11/30/2008 | 2300 |
Subject: | SGP/MWR/C1 - Increased noise in 31.4 GHz channel |
DataStreams: | sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | The 31.4 GHz channel has been showing an increased level of noise which results in increased noise in the LWP retrievals. The instrument is tipping and all other parameters seem to be in the range. The elevate noise started in May, but it seems to have become slightly worse after summer. After November the noise level seems to have gone back to normal. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/15/2008 | 1400 | 12/16/2008 | 1100 |
Subject: | SGP/MWR/B1 - Noisy data |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | After the instrument was returned to service, the brightness temperature data came up extremely noisy. Disregard brightness temperature data as well as PWV and LWP retrievals collected during the indicated time. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/07/2008 | 0000 | 12/29/2008 | 0000 |
Subject: | SGP/MWR/B4 - Occasional spikes in data |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | Between 12/7 and 12/29 the 23.8-GHz brightness temperature was affected by the presence of spikes due to interference that was more active between 12/7 and 12/15 and then diminished. The spikes affect the PWV and the LWP as well. Spikes happen two or three times a day. Review the data to determine where the spikes happen and disregard or filter out the affected points. |
Measurements: | sgpmwrtipB4.a1:
sgpmwrlosB4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/20/2006 | 1824 | 06/19/2007 | 1632 |
11/26/2007 | 1733 | 11/28/2007 | 2122 |
11/28/2007 | 2203 | 01/30/2008 | 1804 |
07/09/2008 | 0304 | 07/11/2008 | 1635 |
07/12/2008 | 0836 | 07/14/2008 | 1427 |
12/12/2008 | 1342 | 12/15/2008 | 1435 |
04/24/2004 | 2048 | 04/26/2004 | 1723 |
04/10/2009 | 0029 | 04/13/2009 | 1220 |
06/16/2009 | 0235 | 06/18/2009 | 1617 |
06/07/2003 | 0228 | 06/11/2003 | 1646 |
01/11/2004 | 0001 | 01/13/2004 | 1924 |
02/15/2004 | 0859 | 02/19/2004 | 1646 |
02/24/2004 | 1950 | 04/01/2004 | 1909 |
04/21/2004 | 2121 | 04/23/2004 | 1658 |
05/31/2005 | 2000 | 06/02/2005 | 1446 |
09/17/2005 | 1949 | 09/19/2005 | 1336 |
12/31/2005 | 0033 | 01/03/2006 | 1420 |
02/06/2006 | 0907 | 02/08/2006 | 1651 |
04/28/2006 | 1421 | 05/01/2006 | 1411 |
07/22/2006 | 0557 | 07/27/2006 | 1338 |
07/26/1999 | 1859 | 08/01/1999 | 1449 |
09/05/1999 | 0300 | 09/09/1999 | 1350 |
12/16/2000 | 0000 | 12/18/2000 | 2202 |
01/14/2001 | 1245 | 01/16/2001 | 1543 |
02/02/2001 | 1717 | 02/05/2001 | 1627 |
07/13/2001 | 2059 | 07/17/2001 | 1840 |
07/20/2001 | 1700 | 07/22/2001 | 1930 |
01/20/2003 | 0259 | 01/23/2003 | 1632 |
01/24/2003 | 1713 | 03/06/2003 | 2033 |
05/13/2003 | 0240 | 05/15/2003 | 1618 |
05/26/2003 | 0142 | 05/29/2003 | 1608 |
Subject: | SGP/MWR/B1 - Missing data |
DataStreams: | sgpmwrlosB1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/23/2008 | 1500 | 11/03/2008 | 1759 |
01/12/2009 | 1900 | 01/29/2009 | 1600 |
Subject: | SGP/MWR/B6 - Loss of thermal stabilization |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | Data are erratic due to loss of thermal stabilization of the instrument. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2009 | 1300 | 01/16/2009 | 0500 |
Subject: | SGP/MWR/B1 - Noisy data |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | After a software crash data were very noisy. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2009 | 0000 | 09/01/2009 | 0000 |
Subject: | SGP/MWR/B1 - Increased noise level |
DataStreams: | sgpmwrlosB1.b1, sgpmwrtipB1.a1 |
Description: | The radiometer was experiencing intermittent increase in the noise level of the two channels. Although it looks like the radiometer was still able to calibrate, the increased noise level may have resulted in a reduced number of tip curves collected. The increased noise was intermittent and lasted for a few hours at a time. |
Measurements: | sgpmwrtipB1.a1:
sgpmwrlosB1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/23/1999 | 1959 | 07/27/1999 | 1624 |
07/30/1999 | 1800 | 08/03/1999 | 1550 |
06/24/2000 | 2041 | 06/26/2000 | 1911 |
07/22/2000 | 2355 | 07/24/2000 | 1752 |
07/29/2000 | 2317 | 07/31/2000 | 1813 |
08/04/2000 | 1807 | 08/07/2000 | 1932 |
08/09/2000 | 2042 | 09/20/2000 | 0007 |
10/31/2000 | 2050 | 11/02/2000 | 1710 |
01/23/2001 | 2215 | 01/29/2001 | 1739 |
02/10/2001 | 0007 | 02/12/2001 | 1822 |
10/06/2001 | 2332 | 10/09/2001 | 1749 |
11/09/2001 | 2357 | 11/13/2001 | 2111 |
04/13/2002 | 1758 | 04/15/2002 | 1838 |
01/24/2003 | 1130 | 01/30/2003 | 1759 |
04/11/2003 | 1130 | 04/14/2003 | 1603 |
05/23/2003 | 1130 | 05/27/2003 | 2138 |
06/14/2003 | 1130 | 06/17/2003 | 1541 |
06/27/2003 | 1130 | 06/30/2003 | 1553 |
07/12/2003 | 1131 | 07/15/2003 | 1551 |
09/14/2003 | 0200 | 09/16/2003 | 2006 |
06/23/2006 | 2158 | 06/28/2006 | 1710 |
07/02/2006 | 0213 | 07/05/2006 | 2126 |
07/26/2006 | 1108 | 08/04/2006 | 1515 |
08/09/2006 | 0405 | 08/11/2006 | 1649 |
08/26/2006 | 0809 | 08/29/2006 | 1947 |
09/08/2006 | 1520 | 09/12/2006 | 2138 |
09/20/2006 | 0600 | 08/02/2007 | 1825 |
10/24/2007 | 1451 | 10/26/2007 | 1625 |
04/10/2008 | 1040 | 04/14/2008 | 1308 |
11/03/2008 | 1714 | 01/12/2009 | 1737 |
Subject: | SGP/MWR/B6 - Missing data |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a1:
|