DQR ID | Subject | Data Streams Affected |
---|---|---|
D000121.1 | SGP/MWR/B5 - wrong calibration | sgp5mwravgB5.c1, sgpmwrlosB5.00, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D001110.4 | SGP/MWR/B4 - Sky Temperatures Noisy | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a0 |
D001110.8 | SGP/MWR/B6 - Sky Temperatures Noisy | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a0 |
D001110.9 | SGP/MWR/B6 - Data Missing | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D001114.16 | SGP/MWR/B4 - Sky Temperatures Noisy | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D001121.2 | SGP/MWR/B6 - Data Missing | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D001121.3 | SGP/MWR/B6 - Sky Temperatures Noisy | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a0 |
D001204.2 | SGP/MWR/B6 - missing data | sgpmwrlosB6.00, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D010111.29 | SGP/MWR/B4 - Negtive spikes in sky temperature data | sgpmwrlosB4.a1, sgpmwrlosB4.b1 |
D010112.1 | SGP/MWR/B6 - Spikes in sky temperature data | sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
D010129.1 | SGP/MWR/B6 - incorrect flagging of data | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D010208.2 | SGP/MWR/B4 - noisy data | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D010208.3 | SGP/MWR/B6 - noisy data | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D010215.3 | SGP/MWR/B5 - missing data | sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D010215.4 | SGP/MWR/B6 - missing data | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D010426.1 | SGP/MWR/B4 - spare MWR | sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a0, sgpmwrtipB4.a1 |
D020805.1 | SGP/MWR/B6 - High noise level, poor calibration | sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
D020805.2 | SGP/MWR/B6 - Instrument replaced, calibration incorrect | sgp5mwravgB6.c1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
D020805.3 | SGP/MWR/B6 - Instrument replaced, calibration updating | sgp5mwravgB6.c1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
D030121.2 | SGP/MWR/B6 - Incorrect MWR warmup configuration | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D030214.1 | SGP/MWR/B4/C1 - LOS cycle skipping | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D030312.3 | SGP/MWR/B4 - Intermittent Negative Sky Brightness Temperatures | sgpmwrlosB4.a1, sgpmwrlosB4.b1 |
D030312.4 | SGP/MWR/B5 - Intermittent Negative Sky Brightness Temperatures | sgpmwrlosB5.a1, sgpmwrlosB5.b1 |
D030312.5 | SGP/MWR/B6 - Intermittent Negative Sky Brightness Temperatures | sgpmwrlosB6.a1, sgpmwrlosB6.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 |
D030909.2 | SGP/MWR/B6 - thermal instability | sgpmwrlosB6.a1, sgpmwrlosB6.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 |
D041021.3 | SGP/MWR/B4 - Heater problem | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
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 |
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 |
D051109.1 | SGP/MWR/B5 - computer problem | sgpmwrB5.00, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
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 |
D060718.3 | SGP/MWR/B5 - Mixer temp unstable | sgpmwrlosB5.b1, sgpmwrtipB5.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 |
D060821.1 | SGP/MWR/B6 - Data missing | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D060825.1 | SGP/MWR/B5 - Radiometer removed for repairs | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
D060927.2 | SGP/MWR/B6 - Computer problem | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D061009.2 | SGP/MWR/B6 - Computer failure; Data missing | sgp5mwravgB6.c1, sgpmwrB6.00, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D061009.3 | SGP/MWR/B6 - Radiometer removed for MWR inter-comparison IOP | sgp5mwravgB6.c1, sgpmwrB6.00, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
D080701.2 | SGP/MWR/B4 - Missing data | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
D080724.1 | SGP/MWR/B5 - Missing data | sgpmwrlosB5.b1 |
D991103.1 | SGP/MWR/B5 - repair & upgrade | sgp5mwravgB5.c1, sgpmwrlosB5.00, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.00, sgpmwrtipB5.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/27/1999 | 1716 | 11/15/1999 | 1500 |
Subject: | SGP/MWR/B5 - wrong calibration |
DataStreams: | sgp5mwravgB5.c1, sgpmwrlosB5.00, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | An upgrade of the instrument by the manufacturer significantly changed its calibration and the configuration file was not updated with the new calibration values when the instrument was returned to service. |
Measurements: | sgpmwrlosB5.00:
sgpmwrlosB5.a1:
sgpmwrtipB5.a1:
sgp5mwravgB5.c1:
sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/07/2000 | 0000 | 08/09/2000 | 2359 |
Subject: | SGP/MWR/B4 - Sky Temperatures Noisy |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a0 |
Description: | The sky temperature data are very noisy, per Victor Morris. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrtipB4.a0:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/01/2000 | 0000 | 08/09/2000 | 2359 |
Subject: | SGP/MWR/B6 - Sky Temperatures Noisy |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a0 |
Description: | The sky temperature data are very noisy, per Victor Morris. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a0:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2000 | 0000 | 08/31/2000 | 2359 |
Subject: | SGP/MWR/B6 - Data Missing |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | Instrument was returned to manufacturer for repair, per Victor Morris. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/20/2000 | 0000 | 09/30/2000 | 2359 |
Subject: | SGP/MWR/B4 - Sky Temperatures Noisy |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | The sky temperature data are very noisy, per Victor Morris. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/01/2000 | 0000 | 09/20/2000 | 2359 |
Subject: | SGP/MWR/B6 - Data Missing |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The instrument was returned to manufacturer for repair, per Victor Morris. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/21/2000 | 0000 | 09/30/2000 | 2359 |
Subject: | SGP/MWR/B6 - Sky Temperatures Noisy |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a0 |
Description: | The sky temperature data are very noisy, per Victor Morris. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrtipB6.a0:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2000 | 2043 | 09/20/2000 | 0030 |
Subject: | SGP/MWR/B6 - missing data |
DataStreams: | sgpmwrlosB6.00, sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | Instrument returned to vendor for repair. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.00:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2000 | 0000 | 12/31/2000 | 2359 |
Subject: | SGP/MWR/B4 - Negtive spikes in sky temperature data |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1 |
Description: | There are negative spikes in the sky temperature data, per Victor Morris. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2000 | 0000 | 12/31/2000 | 2359 |
Subject: | SGP/MWR/B6 - Spikes in sky temperature data |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | There are negative spikes in the sky temperature data, per Victor Morris. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/04/1999 | 0000 | 02/14/2000 | 2145 |
Subject: | SGP/MWR/B6 - incorrect flagging of data |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The "wet window" flag was set high more frequent than expected (wet_window = 1 for several hours almost every night). This problem was corrected by the instrument mentor during a site visit. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2000 | 1800 | 01/25/2001 | 2016 |
Subject: | SGP/MWR/B4 - noisy data |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | The MWR exhibited occasional negative sky brightness temperatures that were resolved, after eliminating the instrument and communication lines as the source of the problem, by reformatting and reconfiguring the laptop computer. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/25/2000 | 1100 | 01/29/2001 | 1742 |
Subject: | SGP/MWR/B6 - noisy data |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The MWR exhibited occasional negative sky brightness temperatures that were resolved, after eliminating the instrument and communication lines as the source of the problem, by reformatting and reconfiguring the laptop computer. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/26/2000 | 2300 | 01/02/2001 | 1715 |
Subject: | SGP/MWR/B5 - missing data |
DataStreams: | sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | The data are missing due to a power failure. |
Measurements: | sgpmwrlosB5.a1:
sgpmwrtipB5.a1:
sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/23/2001 | 2228 | 01/29/2001 | 1742 |
Subject: | SGP/MWR/B6 - missing data |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The data are missing because the computer was removed to upgrade the core configuration. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/2001 | 1800 | 01/23/2001 | 1755 |
Subject: | SGP/MWR/B4 - spare MWR |
DataStreams: | sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrtipB4.a0, sgpmwrtipB4.a1 |
Description: | A spare MWR (s.n.38) was temporarily installed at Vici to help resolve problems with the occurance of negative sky brightness temperatures (see BCR-310 and P000712.1). |
Measurements: | sgpmwrlosB4.b1:
sgpmwrlosB4.a0:
sgpmwrtipB4.a1:
sgpmwrtipB4.a0:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2002 | 0000 | 08/02/2002 | 1652 |
Subject: | SGP/MWR/B6 - High noise level, poor calibration |
DataStreams: | sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | The data from this instrument (serial number 18) have become increasingly noisy, most likely due to a failing local oscillator. A consequence of this increased noise level has been few valid calibration scans ("tip curves") since 1 April 2002: during the period 26-31 March 2002 1496 valid tip curves were acquired, whereas only 729 were acquired during April, 387 during May, 143 during June, 243 during July. As a result, the calibration was not as well-maintained as usual. The measured brightness temperatures and retrieved precipitable water vapor and liquid water path should be regarded as suspect. The instrument was replaced with serial number 04 on 2 August 2002. |
Measurements: | sgpmwrlosB6.b1:
sgpmwrlosB6.a0:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2002 | 1652 | 08/02/2002 | 2144 |
Subject: | SGP/MWR/B6 - Instrument replaced, calibration incorrect |
DataStreams: | sgp5mwravgB6.c1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | MWR serial number 18 was replaced with MWR serial number 04 at 1652 on 2 Aug 2002. Between this time and 2214, when a sufficient number of new tip curves were acquired to update the calibration, the old calibration (for serial number 18) was used. During this period the data are incorrect. |
Measurements: | sgpmwrlosB6.b1:
sgp5mwravgB6.c1:
sgpmwrlosB6.a0:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2002 | 2144 | 08/04/2002 | 0213 |
Subject: | SGP/MWR/B6 - Instrument replaced, calibration updating |
DataStreams: | sgp5mwravgB6.c1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | Following replacement of the MWR at B6, an automatically and continuously upated median calibration value was used based on data acquired during this period. After this period, sufficient tip curves were available to automatically and continuously determine and account for the temperature dependence of the calibration. |
Measurements: | sgpmwrlosB6.b1:
sgp5mwravgB6.c1:
sgpmwrlosB6.a0:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/26/2001 | 2205 | 08/01/2002 | 1700 |
Subject: | SGP/MWR/B6 - Incorrect MWR warmup configuration |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The local oscillator warm-up delay in the MWR configuration file was set to 720 milliseconds instead of the typical 100 milliseconds which substantially increased the duration of the observing cycle. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.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: | sgpmwrlosB4.a1, sgpmwrlosB4.b1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
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.b1:
sgpmwrlosC1.a1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2000 | 2100 | 07/09/2002 | 1700 |
Subject: | SGP/MWR/B4 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | sgpmwrlosB4.a1, sgpmwrlosB4.b1 |
Description: | Several related and recurring problems with the SGP 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 (especially at Purcell), spikes in the data (especially at Vici), 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 (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP 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 has 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: | sgpmwrlosB4.b1:
sgpmwrlosB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/23/1999 | 0600 | 07/10/2002 | 1700 |
Subject: | SGP/MWR/B5 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | sgpmwrlosB5.a1, sgpmwrlosB5.b1 |
Description: | Several related and recurring problems with the SGP 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 (especially at Purcell), spikes in the data (especially at Vici), 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 (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP 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 has 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: | sgpmwrlosB5.a1:
sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/02/1999 | 1800 | 07/09/2002 | 2100 |
Subject: | SGP/MWR/B6 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | sgpmwrlosB6.a1, sgpmwrlosB6.b1 |
Description: | Several related and recurring problems with the SGP 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 (especially at Purcell), spikes in the data (especially at Vici), 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 (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP 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 has 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: | sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
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 |
---|---|---|---|
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.b1:
sgpmwrlosB6.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: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
|
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: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpmwrlosB6.a1:
|
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: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
|
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: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
sgpqmemwrcolB4.c1:
sgp5mwravgB4.c1:
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: | sgpmwrlosB5.a1:
sgpmwrtipB5.a1:
sgpqmemwrcolB5.c1:
sgp5mwravgB5.c1:
sgpmwrlosB5.b1:
|
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: | sgpmwrtipB6.a1:
sgp5mwravgB6.c1:
sgpmwrlosB6.b1:
sgpqmemwrcolB6.c1:
sgpmwrlosB6.a1:
|
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: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
|
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: | sgpmwrtipB5.a1:
sgpmwrlosB5.b1:
|
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: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/2005 | 0000 | 12/12/2005 | 0000 |
Subject: | SGP/MWR/B5 - computer problem |
DataStreams: | sgpmwrB5.00, sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | The computer motherboard failed and attempts to replace failed. A new computer was installed on 12/09. The new computer started to collect data continuously on 12/12. |
Measurements: | sgpmwrtipB5.a1:
sgpmwrB5.00:
sgpmwrlosB5.b1:
|
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: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
sgpqmemwrcolB4.c1:
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:
sgpmwrtipB5.a1:
sgpqmemwrcolB5.c1:
sgpmwrlosB5.b1:
|
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: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
sgpqmemwrcolB6.c1:
sgpmwrlosB6.a1:
|
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: | sgpmwrtipB5.a1:
sgpmwrlosB5.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: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
|
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: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2006 | 0300 | 07/05/2006 | 2100 |
07/26/2006 | 1200 | 08/04/2006 | 1500 |
Subject: | SGP/MWR/B6 - Data missing |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | Data are missing because of computer problem and power outage at the site. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/2006 | 1100 | 06/11/2007 | 1953 |
Subject: | SGP/MWR/B5 - Radiometer removed for repairs |
DataStreams: | sgpmwrlosB5.b1, sgpmwrtipB5.a1 |
Description: | The radiometer was removed for repairs |
Measurements: | sgpmwrtipB5.a1:
sgpmwrlosB5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2006 | 0500 | 08/11/2006 | 1600 |
08/26/2006 | 0900 | 08/29/2006 | 1900 |
Subject: | SGP/MWR/B6 - Computer problem |
DataStreams: | sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The computer was found powered off several times and the operators were unable to reboot it remotely |
Measurements: | sgpmwrtipB6.a1:
sgpmwrlosB6.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/08/2006 | 1600 | 09/12/2006 | 2100 |
Subject: | SGP/MWR/B6 - Computer failure; Data missing |
DataStreams: | sgp5mwravgB6.c1, sgpmwrB6.00, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The computer powered off and it was not possible to restart it remotely. Data are missing between 9/8 and 9/12. |
Measurements: | sgpmwrtipB6.a1:
sgpmwrB6.00:
sgpmwrlosB6.b1:
sgp5mwravgB6.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/20/2006 | 0700 | 08/02/2007 | 1545 |
Subject: | SGP/MWR/B6 - Radiometer removed for MWR inter-comparison IOP |
DataStreams: | sgp5mwravgB6.c1, sgpmwrB6.00, sgpmwrlosB6.b1, sgpmwrtipB6.a1 |
Description: | The radiometer was removed and taken to the Central Facility for the MWR inter-comparison IOP. Data from this instrument will be available from the IOP section as datastream S03 |
Measurements: | sgpmwrtipB6.a1:
sgpmwrB6.00:
sgpmwrlosB6.b1:
sgp5mwravgB6.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/24/1999 | 2000 | 07/26/1999 | 1651 |
07/30/1999 | 2100 | 08/01/1999 | 1452 |
06/01/2000 | 1839 | 06/05/2000 | 1800 |
07/03/2000 | 2239 | 07/05/2000 | 1651 |
08/05/2000 | 1736 | 08/07/2000 | 1857 |
08/09/2000 | 1300 | 09/19/2000 | 1808 |
09/23/2000 | 0436 | 09/25/2000 | 1257 |
12/31/2000 | 1645 | 01/02/2001 | 1700 |
07/13/2001 | 1550 | 07/16/2001 | 1515 |
01/31/2002 | 0047 | 02/05/2002 | 1657 |
12/14/2002 | 0700 | 12/20/2002 | 1719 |
03/04/2003 | 1735 | 03/07/2003 | 1708 |
06/06/2003 | 0046 | 06/09/2003 | 1703 |
09/23/2003 | 1948 | 09/25/2003 | 1842 |
10/09/2003 | 2224 | 10/14/2003 | 1741 |
12/15/2003 | 1130 | 12/18/2003 | 1716 |
05/23/2004 | 2003 | 05/25/2004 | 1729 |
12/24/2004 | 0718 | 12/27/2004 | 1435 |
06/18/2005 | 1521 | 06/20/2005 | 1304 |
09/30/2005 | 0405 | 10/03/2005 | 1359 |
10/07/2005 | 2313 | 10/11/2005 | 1400 |
10/12/2005 | 0041 | 10/14/2005 | 1318 |
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 |
Subject: | SGP/MWR/B4 - Missing data |
DataStreams: | sgpmwrlosB4.b1, sgpmwrtipB4.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosB4.b1:
sgpmwrtipB4.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
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 |
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 |
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 |
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 |
09/14/2007 | 1546 | 09/17/2007 | 1811 |
09/18/2007 | 0525 | 09/26/2007 | 1320 |
10/05/2007 | 0331 | 10/09/2007 | 1549 |
11/03/2007 | 2345 | 11/05/2007 | 1620 |
11/10/2007 | 0009 | 11/13/2007 | 1725 |
11/17/2007 | 2345 | 11/19/2007 | 1411 |
11/21/2007 | 1900 | 12/06/2007 | 2100 |
12/06/2007 | 2120 | 12/13/2007 | 1836 |
01/19/2008 | 1024 | 01/23/2008 | 1438 |
04/15/2008 | 1304 | 04/17/2008 | 1312 |
04/19/2008 | 0116 | 04/21/2008 | 1310 |
05/31/2008 | 1809 | 06/04/2008 | 1915 |
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 |
---|---|---|---|
09/17/1999 | 1303 | 10/27/1999 | 1716 |
Subject: | SGP/MWR/B5 - repair & upgrade |
DataStreams: | sgp5mwravgB5.c1, sgpmwrlosB5.00, sgpmwrlosB5.a1, sgpmwrlosB5.b1, sgpmwrtipB5.00, sgpmwrtipB5.a1 |
Description: | The MWR was returned to the manufacturer for repair and upgrade. Radiometric's service report follows: Here are the repairs/modifications that were performed on WVR12. Found dew blower heater IC driver and AC relay failed. Replaced both. Replaced dew blower fan because of aging. Updated R4 (2.4K), R9 (100 ohm) on digital board; makes elevation motor sensor less sensitive to sunlight when cover is off. Installed 0.1 mfd caps on power supply 7840 voltage regulators, pin 8 to 11. Makes PS more stable Set PS voltages 5.1 and 12.5 volts Set PS current limits with dummy load. Installed 0.01 mfd to gnd,, 0.1 mfd across pins 1&2 on AD524. RFI mitigation. Installed ferrite chokes on +/- 15 volts at IF/video amp. RFI mitigation. Replaced cracked crossguide coupler. Undoubtedly the cause of noise diode shifts. Replaced INMET 3016 50 ohm load on IF port with 3016A pseudo-noise figures: 23GHz= 5.19: 31GHz= 5.26 Temp. coefs. 23GHz -0.01: 31GHz 0.03. Data collected during this period should be ignored as they are due to testing by the manufacturer and are unrepresentative of the site. |
Measurements: | sgpmwrlosB5.00:
sgpmwrlosB5.a1:
sgpmwrtipB5.00:
sgpmwrtipB5.a1:
sgp5mwravgB5.c1:
sgpmwrlosB5.b1:
|