DQR ID | Subject | Data Streams Affected |
---|---|---|
D021004.17 | TWP/MWR/C3 - Elevated Skybrightness Temperatures | twpmwrlosC3.a1, twpmwrlosC3.b1 |
D021004.18 | TWP/MWR/C3 - Wet Window Flag not correct | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D030312.8 | TWP/MWR/C3 - Intermittent Negative Sky Brightness Temperatures | twpmwrlosC3.b1, twpmwrlosC3.a1 |
D030312.9 | TWP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | twpmwrlosC1.b1 |
D030822.11 | TWP/MWR/C3 - min/max/delta values incorrect | twpmwrlosC3.b1 |
D040211.4 | TWP/MWR/C2 - thermal instability | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D040220.1 | TWP/MWR/C1 - wrong azimuth | twpmwrlosC1.b1 |
D040920.1 | TWP/MWR/C2 - Data collection problem | twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
D050310.3 | TWP/MWR/C2 - Heater problem | twp5mwravgC2.c1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
D050524.2 | TWP/MWR/C2 - mixer temperature | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D050617.1 | PYE/MWR/M1 - Instrument computer locked up | pyemwrlosM1.b1 |
D050725.10 | TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients | twp5mwravgC2.c1, twpmwrlosC2.b1, twpqmemwrcolC2.c1 |
D050725.11 | TWP/MWR/C3 - Reprocess - Revised Retrieval Coefficients | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D050725.12 | PYE/MWR/M1 - Reprocessed: Revised Retrieval Coefficients | pyemwrlosM1.b1, pyemwrtipM1.a1 |
D050725.9 | TWP/MWR/C1 - Reprocessed: Revised Retrieval Coefficients | twp5mwravgC1.c1, twpmwrlosC1.b1, twpmwrtipC1.a1 |
D050726.4 | PYE/MWR/M1 - Reprocessed: Calibration corrected | pyemwrlosM1.b1, pyemwrtipM1.a1 |
D050927.1 | PYE/MWR/M1 - New software version (4.15) installed | pyemwrlosM1.b1, pyemwrtipM1.a1 |
D050928.1 | TWP/MWR/C1 - New software version (4.15) installed | twpmwrtipC1.a1, twpmwrlosC1.b1 |
D050928.2 | TWP/MWR/C2 - New software version (4.15) installed | twpmwrtipC2.a1, twpmwrlosC2.b1 |
D050928.5 | TWP/MWR/C3 - New software version (4.15) installed | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D051114.2 | TWP/MWR/C3 - Instrument failure, Power outage | twpmwrtipC3.a1, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrC3.00 |
D051214.1 | TWP/MWR/C3 - REPROCESS- Updated retrieval coefficients | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D060419.4 | NIM/MWR/M1 - Instrument noise problem/RF interference | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
D060601.1 | TWP/MWR/C3 - Site shutdown | twpmwrC3.00, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
D060718.1 | NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating. | nimmwrlosM1.b1, nimmwrtipM1.a1 |
D060927.1 | NIM/MWR/M1 - Sun in field of view of radiometer | nimmwrlosM1.b1 |
D061002.1 | TWP/MWR/C2 - Missing data | twp5mwravgC2.c1, twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
D061114.2 | TWP/MWR/C1 - Radiometer failure | twpmwrC1.00, twpmwrlosC1.b1, twpmwrtipC1.a1 |
D061114.4 | TWP/MWR/C3 - Sun in field of view of radiometer | twpmwrlosC3.b1, twpmwrtipC3.a1 |
D061121.1 | TWP/MWR/C2 - Missing Data | twpmwrlosC2.b1 |
D061213.3 | TWP/MWR/C2 - Reprocessed: New Calibration coefficients | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D070105.1 | TWP/MWR/C1 - Missing data | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D070412.3 | TWP/MWR/C1/C2 - Sun in the field of view | twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1 |
D070613.1 | TWP/MWR/C1 - Intermittent data | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D071208.1 | TWP/MWR/C1 - Incorrect ambient temperature readings | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D080828.1 | HFE/MWR/M1 - Insufficient calibration stability | hfemwrlosM1.b1, hfemwrtipM1.a1 |
D081013.2 | TWP/MWR/C1 - Short periods of wrong ambient temperature | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D081216.1 | TWP/MWR/C2 - Incorrect ambient temperature during rain | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D090114.4 | TWP/MWR/C1 - Ambient temperature data missing | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D090311.3 | HFE/MWR/M1 - Missing data | hfemwrlosM1.b1, hfemwrtipM1.a1 |
D090417.3 | TWP/MWR/C2 - Intermittent data | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D090522.1 | GRW/MWR/M1 - Loose mirror | grwmwrlosM1.b1, grwmwrtipM1.a1 |
D100224.6 | GRW/MWR/M1 - Reprocessed: Biased LWP retrievals-Updated retrieval coefficients | grwmwrlosM1.b1, grwmwrtipM1.a1 |
D100326.2 | GRW/MWR/M1 - Incorrect ambient temperature | grwmwrlosM1.b1, grwmwrtipM1.a1 |
D100716.1 | GRW/MWR/M1 - Incorrect instrument computer set-up | grwmwrtipM1.a1, grwmwrlosM1.b1 |
D100830.1 | GRW/MWR/M1 - Erratic brightness temperature | grwmwrlosM1.b1, grwmwrtipM1.a1 |
D100830.3 | GRW/MWR/M1 - Missing data | grwmwrlosM1.b1, grwmwrtipM1.a1 |
D101216.1 | SBS/MWR/S1 - Reprocessed: Incorrect retrievals | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
D110221.2 | TWP/MWR/C1 - Intermittent data due to computer problems | twpmwrtipC1.a1, twpmwrlosC1.b1 |
D110221.4 | SBS/MWR/M1 - Missing data | sbsmwrtipM1.a1, sbsmwrlosM1.b1 |
D110221.5 | SBS/MWR/M1 - Instrument not well calibrated | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
D110221.6 | SBS/MWR/M1 - Reprocessed: Incorrect retrievals | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
D110308.2 | SBS/MWR/S1 - Missing data | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
D110317.2 | SBS/MWR/M1 - Temperature instability | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
D110414.3 | SBS/MWR/M1 - Instrument problem | sbsmwrM1.00, sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
D110426.1 | SBS/MWR/S1 - Interference spikes | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
D110617.1 | TWP/MWR/C2 - Missing ambient temperature | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D110815.1 | PGH/MWR/M1 - Reprocessed: Incorrect calibration | pghmwrlosM1.b1, pghmwrtipM1.a1 |
D110815.2 | PGH/MWR/M1 - Reprocessed: Incorrect retrievals | pghmwrlosM1.b1, pghmwrtipM1.a1 |
D111006.1 | GAN/MWR/M1 - Missing data | ganmwrlosM1.b1, ganmwrtipM1.a1 |
D111117.1 | GAN/MWR/M1 - Sun in the radiometer's field of view | ganmwrlosM1.b1, ganmwrtipM1.a1 |
D111214.1 | TWP/MWR/C1 - Rain events not flagged | twpmwrlosC1.b1, twpmwrtipC1.a1 |
D120501.1 | GAN/MWR/M1 - Surface temperature failure | ganmwrlosM1.b1, ganmwrtipM1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2002 | 2212 | 10/02/2002 | 2359 |
Subject: | TWP/MWR/C3 - Elevated Skybrightness Temperatures |
DataStreams: | twpmwrlosC3.a1, twpmwrlosC3.b1 |
Description: | For an unknown reason, the MWR began to exhibit elevated sky brightness temperatures. This problem was corrected when the instrument was power-cycled. |
Measurements: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/28/2002 | 0000 | 10/02/2002 | 2359 |
Subject: | TWP/MWR/C3 - Wet Window Flag not correct |
DataStreams: | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
Description: | The moisture sensor threshold voltage in the MWR configuration file was set to the wrong value for the new heater/blower assembly. This caused the wet window flag to not be set high during times of rain. |
Measurements: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2002 | 0151 | 10/02/2002 | 2359 |
Subject: | TWP/MWR/C3 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | twpmwrlosC3.b1, twpmwrlosC3.a1 |
Description: | Several related and recurring problems with the MWRs have been reported dating back to 1999. These problems were due to the occurrence of blackbody signals (in counts) that were half of those expected. The symptoms included noisy data, spikes in the data, negative brightness temperatures, and apparent loss of serial communication between the computer and the radiometer, which results in a self-termination of the MWR program. Because these all initially appeared to be hardware-related problems, the instrument mentor and 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 did not revealed any instrument problems), and (4) reconfigured the computer's operating system. Despite several attempts to isolate and correct it, the problem persisted. It became apparent that some component of the Windows98 configuration conflicted with the DOS-based MWR program or affected the serial port or the contents of the serial port buffer. This problem was finally corrected by upgrading the MWR software with a new Windows-compatible program (MWR version 4.12). |
Measurements: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/04/2002 | 2200 | 10/31/2002 | 2220 |
Subject: | TWP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | twpmwrlosC1.b1 |
Description: | Several related and recurring problems with the MWRs have been reported dating back to 1999. These problems were due to the occurrence of blackbody signals (in counts) that were half of those expected. The symptoms included noisy data, spikes in the data, negative brightness temperatures, and apparent loss of serial communication between the computer and the radiometer, which results in a self-termination of the MWR program. Because these all initially appeared to be hardware-related problems, the instrument mentor and 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 did not revealed any instrument problems), and (4) reconfigured the computer's operating system. Despite several attempts to isolate and correct it, the problem persisted. It became apparent that some component of the Windows98 configuration conflicted with the DOS-based MWR program or affected the serial port or the contents of the serial port buffer. This problem was finally corrected by upgrading the MWR software with a new Windows-compatible program. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2002 | 0152 | 02/09/2003 | 2359 |
Subject: | TWP/MWR/C3 - min/max/delta values incorrect |
DataStreams: | twpmwrlosC3.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: | twpmwrlosC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/27/2004 | 1958 | 01/31/2004 | 2059 |
Subject: | TWP/MWR/C2 - thermal instability |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The MWR required an unusually long time to reach thermal stability after a 4-day outage due to a power failure that damaged the blower/heater assembly. Also during this period, the heater, which had been replaced, appears to have been on continously, causing the data to be inappropriately flagged. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/11/1996 | 0000 | 02/18/2004 | 2250 |
Subject: | TWP/MWR/C1 - wrong azimuth |
DataStreams: | twpmwrlosC1.b1 |
Description: | The MWR was initially installed at an azimuth angle defined as 180 degrees but the value in the configuration file was not changed from the default of 0 degrees. In examining photos taken during the installation of the AWS tower, I noticed that the MWR was rotated opposite the normal orientation. The value in the configuration file was changed to reflect the actual azimuth of the instrument. |
Measurements: | twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2004 | 2000 | 09/24/2004 | 0219 |
Subject: | TWP/MWR/C2 - Data collection problem |
DataStreams: | twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | Large, frequent data gaps occurred due to a failing laptop computer. The problem was corrected when a new computer was installed. |
Measurements: | twpmwrtipC2.a1:
twpmwrC2.00:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2005 | 2340 | 03/14/2005 | 1650 |
Subject: | TWP/MWR/C2 - Heater problem |
DataStreams: | twp5mwravgC2.c1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | When the wiring of the air temperature sensor was checked the heater apparently began activating too often. |
Measurements: | twpmwrtipC2.a1:
twp5mwravgC2.c1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2005 | 2340 | 04/19/2005 | 0242 |
Subject: | TWP/MWR/C2 - mixer temperature |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | When the wiring of the air temperature sensor was checked the mixer temperature unexpectedly decreased 4 degrees. It increased to its normal value when the dielectric window was replaced. The problem was probably caused by a loose and/or corroded connection. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2005 | 0000 | 06/09/2005 | 1500 |
Subject: | PYE/MWR/M1 - Instrument computer locked up |
DataStreams: | pyemwrlosM1.b1 |
Description: | The MWR computer locked up and required a reboot at 00Z on June 9, 2005. When the program was restarted, water vapor, liquid path, and temps dropped to zero. They did not recover until 15Z the same day. |
Measurements: | pyemwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/27/2002 | 0600 | 06/30/2005 | 2100 |
Subject: | TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients |
DataStreams: | twp5mwravgC2.c1, twpmwrlosC2.b1, twpqmemwrcolC2.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). The Rosenkranz-based retrieval coefficients became active at TWP.C2 20020427.0600. The MONORTM-based retrieval coefficients became active at TWP.C2 20050630.2100. Note: The TWP.C2 data for 19981028-20050630 have been reprocessed to apply the MONORTM-based retrievals for all time. The reprocessed data were archived 20061003. |
Measurements: | twpqmemwrcolC2.c1:
twp5mwravgC2.c1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2002 | 0151 | 06/30/2005 | 2100 |
Subject: | TWP/MWR/C3 - Reprocess - Revised Retrieval Coefficients |
DataStreams: | twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
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 was active at TWP.C3 from inception of the data, 20020227.0151. The MONORTM-based retrieval coefficients became active at TWP.C3 20050630.2100. 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: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0700 | 05/06/2005 | 0000 |
Subject: | PYE/MWR/M1 - Reprocessed: Revised Retrieval Coefficients |
DataStreams: | pyemwrlosM1.b1, pyemwrtipM1.a1 |
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 water 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). At Point Reyes, the original 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 yielded nearly identical results to the MONORTM retrievals. The MONORTM-based retrieval coefficients became active at PYE.M1 20050506. Note: The PYE.M1 MWRLOS data for 20050201-20050506 have been reprocessed to apply the MONORTM-based retrievals for all time. The reprocessed data were archived in April 2007. The TIP data have not been reprocessed. |
Measurements: | pyemwrlosM1.b1:
pyemwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/04/2002 | 0200 | 06/30/2005 | 2100 |
Subject: | TWP/MWR/C1 - Reprocessed: Revised Retrieval Coefficients |
DataStreams: | twp5mwravgC1.c1, twpmwrlosC1.b1, twpmwrtipC1.a1 |
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). The Rosenkranz-based retrieval coefficients became active at TWP.C1 20020504.0200. The MONORTM-based retrieval coefficients became active at TWP.C1 20050630.2100. Note: The TWP.C1 data for 19961011-20050630 have been reprocessed to apply the |
Measurements: | twp5mwravgC1.c1:
twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/29/2005 | 0000 | 07/17/2005 | 2100 |
Subject: | PYE/MWR/M1 - Reprocessed: Calibration corrected |
DataStreams: | pyemwrlosM1.b1, pyemwrtipM1.a1 |
Description: | On May 28 1:30 GMT the NFOV radiometer was placed in the field of view of the MWR tip calibration. Almost immediately calibration of the MWR was compromised resulting in incorrect brightness temperatures and overestimation of both PWV and LWP. On July 15 the NFOV radiometer was moved away from the MWR and the instantaneous calibration values jumped back to normal. The median values returned to normal on July 17 around 2100. The LOS data were reprocessed using interpolated values for the calibration coefficients. The reprocessed data are available from the ARM Archive effective December 7, 2005. NOTE: the format of the reprocessed data are slightly different than the format of the original data and the data available before and after the reprocessed data period. The quality of the data are not affected, just the format. The MWRTIP data can not be reprocessed and should be used with caution. |
Measurements: | pyemwrlosM1.b1:
pyemwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0700 | 09/13/2005 | 1805 |
Subject: | PYE/MWR/M1 - New software version (4.15) installed |
DataStreams: | pyemwrlosM1.b1, pyemwrtipM1.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: | pyemwrlosM1.b1:
pyemwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2002 | 2200 | 09/13/2005 | 1854 |
Subject: | TWP/MWR/C1 - New software version (4.15) installed |
DataStreams: | twpmwrtipC1.a1, twpmwrlosC1.b1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in October 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: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2002 | 2101 | 09/15/2005 | 1424 |
Subject: | TWP/MWR/C2 - New software version (4.15) installed |
DataStreams: | twpmwrtipC2.a1, twpmwrlosC2.b1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in November 2002. The software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier problem. The software upgrade corrected the earlier problem but introduced a new one that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these problems. The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/2002 | 0000 | 09/20/2005 | 2156 |
Subject: | TWP/MWR/C3 - New software version (4.15) installed |
DataStreams: | twpmwrlosC3.b1, twpmwrtipC3.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in October 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 9/20/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | twpmwrlosC3.b1:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2005 | 0453 | 12/10/2005 | 0000 |
Subject: | TWP/MWR/C3 - Instrument failure, Power outage |
DataStreams: | twpmwrtipC3.a1, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrC3.00 |
Description: | A lightning strike sent the MWR offline. The radiometer suffered extensive damage, was removed from the site and sent to the vendor for repair. A spare radiometer was sent to the TWP/C3 site and was installed on 12/07. However, some hardaware communication issues prevented data collection until 12/10. |
Measurements: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
twpmwrC3.00:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/27/2002 | 0000 | 12/12/2005 | 1600 |
Subject: | TWP/MWR/C3 - REPROCESS- Updated retrieval coefficients |
DataStreams: | twpmwrlosC3.b1, twpmwrtipC3.a1 |
Description: | The statistical retrieval coefficients currently in use at the Darwin (TWP/C3) site were developed using radiosonde RS80 launched from Manus Island during the TOGA-COARE experiment. Data from Manus Island have minimal seasonality, therefore a single, annual set of coefficients was used at all three sites. Retrievals using these coefficients are sufficiently accurate especially during the local summer months (December-January). However, the Darwin site displays a summer/winter seasonality resulting in larger differences during the southern winter (May- June). Since we now have enough radiosonde soundings (RS80 and RS90) available at the Darwin site, the Darwin coefficients were modified to better reflect the local seasonality. |
Measurements: | twpmwrlosC3.b1:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2006 | 0000 | 01/08/2007 | 0000 |
Subject: | NIM/MWR/M1 - Instrument noise problem/RF interference |
DataStreams: | nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | Data are affected by intermittent spikes that become more frequent starting in March 2006. Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably RF interference. |
Measurements: | nimmwrtipM1.a1:
nimmwrM1.00:
nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/24/2006 | 0000 | 04/25/2006 | 2259 |
Subject: | TWP/MWR/C3 - Site shutdown |
DataStreams: | twpmwrC3.00, twpmwrlosC3.a1, twpmwrlosC3.b1, twpmwrtipC3.a1 |
Description: | On 4/24, the site was shutdown in preparation for a cyclone. Instruments were back up on 4/25 at 22:59 |
Measurements: | twpmwrlosC3.b1:
twpmwrlosC3.a1:
twpmwrC3.00:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2006 | 0000 | 01/08/2007 | 0000 |
Subject: | NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating. |
DataStreams: | nimmwrlosM1.b1, nimmwrtipM1.a1 |
Description: | The radiometer was intermittently thermally unstable resulting in poor calibrations for four brief time periods. These data have been reprocessed to apply corrected calibrations. The affected time periods were: 20060302-20060303 20060423-20060425 20060512-20060515 20060531-20060603 |
Measurements: | nimmwrtipM1.a1:
nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2006 | 0000 | 08/31/2006 | 2300 |
Subject: | NIM/MWR/M1 - Sun in field of view of radiometer |
DataStreams: | nimmwrlosM1.b1 |
Description: | Around 12 pm every day between 8/1 and 8/31 there is an increase in the brightness temperature due to the sun being in the field of view of the radiometer. |
Measurements: | nimmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/14/2006 | 1500 | 11/27/2006 | 1900 |
Subject: | TWP/MWR/C2 - Missing data |
DataStreams: | twp5mwravgC2.c1, twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The heater blower assembly was causing the fuse to blow. The instrument was taken offline until a replacement arrives. |
Measurements: | twpmwrtipC2.a1:
twp5mwravgC2.c1:
twpmwrC2.00:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2006 | 1000 | 01/30/2007 | 0457 |
Subject: | TWP/MWR/C1 - Radiometer failure |
DataStreams: | twpmwrC1.00, twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | The instrument stopped responding and had to be powered off. Suspect cause of failure is a faulty digital board. |
Measurements: | twpmwrC1.00:
twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/20/2006 | 0000 | 11/09/2006 | 0400 |
10/15/2008 | 0000 | 11/08/2008 | 0000 |
10/15/2009 | 0000 | 11/10/2009 | 0000 |
02/01/2010 | 0000 | 03/01/2010 | 0000 |
02/01/2011 | 0000 | 03/01/2011 | 0000 |
10/15/2011 | 0000 | 11/10/2011 | 0000 |
Subject: | TWP/MWR/C3 - Sun in field of view of radiometer |
DataStreams: | twpmwrlosC3.b1, twpmwrtipC3.a1 |
Description: | Each day around local noon (2-3 AM UTC), there is an increase in the brightness temperature due to the sun being in the field of view of the radiometer. |
Measurements: | twpmwrlosC3.b1:
twpmwrtipC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/1998 | 2112 | 11/06/1998 | 2140 |
07/02/2000 | 2000 | 07/04/2000 | 0047 |
02/09/2002 | 2300 | 02/11/2002 | 2300 |
01/23/2004 | 1100 | 01/27/2004 | 1957 |
05/27/2005 | 1143 | 05/29/2005 | 2132 |
Subject: | TWP/MWR/C2 - Missing Data |
DataStreams: | twpmwrlosC2.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/27/2006 | 1900 | 11/30/2006 | 0700 |
Subject: | TWP/MWR/C2 - Reprocessed: New Calibration coefficients |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | On 11/27 a spare radiometer was installed to replace a faulty radiometer. Once the radiometer started to collect data it used the default calibration coefficients until it collected enough tip data to determine its own coefficients. The data were reprocessed to apply corrected calibrations and the reprocessed data were archived 20061222. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1996 | 2338 | 12/11/1996 | 0003 |
01/05/2011 | 2300 | 01/07/2011 | 0310 |
02/25/2011 | 1300 | 03/07/2011 | 0400 |
03/16/2011 | 1900 | 03/31/2011 | 0100 |
10/22/2011 | 2200 | 10/25/2011 | 0400 |
10/20/1999 | 0500 | 10/22/1999 | 0600 |
01/14/2000 | 0800 | 01/16/2000 | 0342 |
01/14/2006 | 1258 | 01/16/2006 | 0638 |
10/01/1999 | 0900 | 10/18/1999 | 0000 |
02/28/1997 | 0118 | 06/27/1997 | 2048 |
11/06/1997 | 1959 | 11/12/1997 | 1800 |
01/05/1998 | 0204 | 01/08/1998 | 2048 |
04/21/1998 | 0017 | 04/29/1998 | 1803 |
09/13/1998 | 0759 | 09/20/1998 | 0900 |
11/20/1998 | 2226 | 11/27/1998 | 1026 |
02/27/1999 | 0600 | 03/02/1999 | 0159 |
03/06/1999 | 0800 | 03/09/1999 | 1807 |
09/03/1999 | 0300 | 09/10/1999 | 0400 |
Subject: | TWP/MWR/C1 - Missing data |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2007 | 0000 | 04/02/2007 | 2359 |
03/01/2008 | 0000 | 04/02/2008 | 2359 |
09/10/2008 | 0000 | 10/12/2008 | 0000 |
03/01/2009 | 0000 | 04/02/2009 | 2359 |
09/11/2009 | 0000 | 10/10/2009 | 2359 |
03/01/2010 | 0000 | 04/02/2010 | 2359 |
03/01/2011 | 0000 | 04/02/2011 | 2359 |
09/13/2011 | 0000 | 10/09/2011 | 0000 |
Subject: | TWP/MWR/C1/C2 - Sun in the field of view |
DataStreams: | twpmwrlosC1.b1, twpmwrlosC2.b1, twpmwrtipC1.a1, twpmwrtipC2.a1 |
Description: | Every day between around noon local time (usually between 1 and 2 AM UTC time) there is an increase in the brightness temperatures due to the sun in the field of view of the radiometer. The effect lasts less than an hour around local noon (usually between 1 and 2 AM UTC time). The effect appears as a smooth increase and decrease in brightness temperature. |
Measurements: | twpmwrtipC2.a1:
twpmwrtipC1.a1:
twpmwrlosC1.b1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/12/2007 | 0700 | 06/13/2007 | 2000 |
06/16/2007 | 2100 | 06/17/2007 | 2100 |
Subject: | TWP/MWR/C1 - Intermittent data |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | After a computer change the MWR program did not restart properly. Data are intermittent between 6/12 and 6/17. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2007 | 0000 | 12/11/2007 | 0355 |
Subject: | TWP/MWR/C1 - Incorrect ambient temperature readings |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | Starting on 11/21 the ambient temperature readings are intermittent and have spikes. Site operators replaced the dew-blower on 12/11 and readings came back to normal |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2008 | 0000 | 09/26/2008 | 2359 |
10/01/2008 | 0000 | 10/06/2008 | 1500 |
10/16/2008 | 0201 | 10/16/2008 | 2359 |
10/20/2008 | 0000 | 10/23/2008 | 2359 |
Subject: | HFE/MWR/M1 - Insufficient calibration stability |
DataStreams: | hfemwrlosM1.b1, hfemwrtipM1.a1 |
Description: | The noise diode temperature suddenly jumped to > 60 C after a power outage. Following additional power problems the noise diode injection temperature drifted fast and the radiometer was not able to calibrate properly. Data during the indicated time periods are poorly calibrated and sometimes erratic. Users should be aware that the accuracy of the measurements is dramatically degraded. Users can use the microwave profiler (MWRP) data to supplement the MWR data. |
Measurements: | hfemwrlosM1.b1:
hfemwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/01/2008 | 0000 | 09/30/2008 | 2359 |
Subject: | TWP/MWR/C1 - Short periods of wrong ambient temperature |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | During this month there are a few intermittent instances of bad ambient temperature readings. I will summarize here these short time ranges: 20080909 between 02:00 and 03:00 UTC 20080909 between 09:00 and 14:00 UTC Additionally the ambient temperature has short but frequent data gaps. The data gaps are very short (less than one hour). Users could interpolate missing data or use alternative sensors such as the surface meteorological data available for the site. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2008 | 0100 | 01/09/2009 | 0300 |
Subject: | TWP/MWR/C2 - Incorrect ambient temperature during rain |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The ambient temperature was approximately 15 degree higher than what it should be when it was raining and the heater came. On Jan 9 2009 the dewblower was replaced which solved the problem. The increased ambient temperature (tkair) was happening during times of rain and users should always disregard MWR data during rain events. Therefore this DQR is colored transparent. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/2008 | 1900 | 02/06/2009 | 0530 |
Subject: | TWP/MWR/C1 - Ambient temperature data missing |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | The ambient temperature readings (tkair) suddenly failed. The sensor was replaced on Feb 6. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/06/2008 | 1501 | 10/16/2008 | 0200 |
10/17/2008 | 0000 | 10/19/2008 | 2359 |
10/24/2008 | 0000 | 10/26/2008 | 2359 |
11/09/2008 | 0000 | 12/28/2008 | 0000 |
Subject: | HFE/MWR/M1 - Missing data |
DataStreams: | hfemwrlosM1.b1, hfemwrtipM1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | hfemwrlosM1.b1:
hfemwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/06/2009 | 1600 | 03/14/2009 | 2200 |
Subject: | TWP/MWR/C2 - Intermittent data |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | There are several short data gaps (usually 2 to 7 hours) in the data due to computer malfunction. The problem was solved by replacing the computer. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2009 | 0000 | 06/16/2009 | 0745 |
Subject: | GRW/MWR/M1 - Loose mirror |
DataStreams: | grwmwrlosM1.b1, grwmwrtipM1.a1 |
Description: | The data from the MWR were suspicious and became progressively worse. The problem was traced back to the fact that the screw that keeps the mirror in place had become loose and the mirror was freely rotating. The mirror was tightened on 6/9/2009, however the measurements were noisy until 6/16, when the instrument was rebooted and all the connections checked. Measurements between 5/1 and 6/9 should not be used. Data between 6/9 and 6/16 are usable, although they are very noisy. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2009 | 0000 | 03/31/2010 | 1700 |
Subject: | GRW/MWR/M1 - Reprocessed: Biased LWP retrievals-Updated retrieval coefficients |
DataStreams: | grwmwrlosM1.b1, grwmwrtipM1.a1 |
Description: | Retrieval coefficients were updated to screen for some bad soundings. Data were reprocessed 20100507. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/2010 | 1048 | 02/11/2010 | 1045 |
Subject: | GRW/MWR/M1 - Incorrect ambient temperature |
DataStreams: | grwmwrlosM1.b1, grwmwrtipM1.a1 |
Description: | The ambient temperature readings are incorrect. Problem appeared to have started around 10:48 GMT on 02/09, but was not really noticeable until slightly after 11 GMT, when tkair values dipped considerably. The dewblower was replaced on 2/11 and temperature readings returned to normal. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/11/2010 | 1800 | 08/09/2010 | 1400 |
Subject: | GRW/MWR/M1 - Incorrect instrument computer set-up |
DataStreams: | grwmwrtipM1.a1, grwmwrlosM1.b1 |
Description: | Starting late on 07/11 the instrument began to have very brief (< 1 min) data outages every few hours. By 07/12 data had become noticeably incorrect, particularly the PWV, LWP, TB23, and TB31. At ~17 Z on 0713 the missing data / no data available flags became more frequent. The problem was identified as improper settings of the instrument computer and was solved on 8/9. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2010 | 1200 | 08/09/2010 | 1400 |
Subject: | GRW/MWR/M1 - Erratic brightness temperature |
DataStreams: | grwmwrlosM1.b1, grwmwrtipM1.a1 |
Description: | Around 12 Z on 7/20 both the PWV and 23.8 GHz brightness temp values began to diverge from those of the MWRP. By 7/22 both the LWP and 31.4 GHz brightness temp had followed suit. At 0600 Z on 7/22 multiple (10-20), brief (<=1 min) data outages began appearing hourly. The problem persisted intermittently until 8/9. On 8/9, changes in the settings of the computer restored the proper functionality of the MWR software. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/04/2010 | 1600 | 07/06/2010 | 1400 |
Subject: | GRW/MWR/M1 - Missing data |
DataStreams: | grwmwrlosM1.b1, grwmwrtipM1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | grwmwrtipM1.a1:
grwmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/29/2010 | 0000 | 04/25/2011 | 2359 |
Subject: | SBS/MWR/S1 - Reprocessed: Incorrect retrievals |
DataStreams: | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
Description: | The water vapor and cloud liquid water retrievals were incorrect for lack of radiosondes to derive retrieval coefficients. At the end of the deployment, the mentor provided new retrieval coefficients and the MWRLOS data were reprocessed and archived. The MWRTIP data have not yet been reprocessed. The correction of these data are in the reprocessing queue at a low priority. |
Measurements: | sbsmwrtipS1.a1:
sbsmwrlosS1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/2011 | 0311 | 01/09/2011 | 0500 |
Subject: | TWP/MWR/C1 - Intermittent data due to computer problems |
DataStreams: | twpmwrtipC1.a1, twpmwrlosC1.b1 |
Description: | Between 1/7 and 1/9 there are large segments of data missing because of a computer problem. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/15/2010 | 0000 | 01/12/2011 | 0000 |
03/11/2011 | 2000 | 03/14/2011 | 1400 |
03/17/2011 | 1500 | 03/23/2011 | 2000 |
03/27/2011 | 1300 | 04/01/2011 | 1300 |
Subject: | SBS/MWR/M1 - Missing data |
DataStreams: | sbsmwrtipM1.a1, sbsmwrlosM1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sbsmwrlosM1.b1:
sbsmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2011 | 0000 | 01/14/2011 | 0000 |
Subject: | SBS/MWR/M1 - Instrument not well calibrated |
DataStreams: | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
Description: | After being installed the instrument needed some time to stabilize and collect some tip data. |
Measurements: | sbsmwrlosM1.b1:
sbsmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/2010 | 0000 | 04/25/2011 | 2359 |
Subject: | SBS/MWR/M1 - Reprocessed: Incorrect retrievals |
DataStreams: | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
Description: | The PWV and LWP retrievals at this site were incorrect for lack of radiosonde data. At the end of the deployment, the mentor provided new retrieval coefficients and the MWRLOS data were reprocessed and archived. The MWRTIP data have not yet been reprocessed. The correction of these data are in the reprocessing queue at a low priority. |
Measurements: | sbsmwrlosM1.b1:
sbsmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/17/2010 | 1700 | 11/19/2010 | 2000 |
Subject: | SBS/MWR/S1 - Missing data |
DataStreams: | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sbsmwrtipS1.a1:
sbsmwrlosS1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2011 | 0000 | 02/03/2011 | 0000 |
Subject: | SBS/MWR/M1 - Temperature instability |
DataStreams: | sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
Description: | The radiometer was thermally unstable due to the extremely cold outside temperature. Data are suspect. |
Measurements: | sbsmwrlosM1.b1:
sbsmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/14/2011 | 1400 | 03/17/2011 | 1500 |
03/23/2011 | 2000 | 03/27/2011 | 1300 |
Subject: | SBS/MWR/M1 - Instrument problem |
DataStreams: | sbsmwrM1.00, sbsmwrlosM1.b1, sbsmwrtipM1.a1 |
Description: | The fan in the dewblower malfunctioned from 3/11 to 3/30. During this time it is likely that snow deposited on the radome during snowfall events and it stayed on the radome longer than usual. |
Measurements: | sbsmwrM1.00:
sbsmwrlosM1.b1:
sbsmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/15/2010 | 0000 | 04/25/2011 | 1600 |
Subject: | SBS/MWR/S1 - Interference spikes |
DataStreams: | sbsmwrlosS1.b1, sbsmwrtipS1.a1 |
Description: | Interference spikes appear in the data affecting mostly the 23.8 GHz channel and to a lesser extend the 30 GHz channel. Some days are more affected than others. The number of spikes varies between 1 and ~ 5 per day. The data are mostly unaffected except for the short time interval during which the interference takes place (usually one or two data points). |
Measurements: | sbsmwrtipS1.a1:
sbsmwrlosS1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2011 | 0000 | 06/14/2011 | 1400 |
Subject: | TWP/MWR/C2 - Missing ambient temperature |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The tkair readings (ambient temperatures) is very intermittent and mostly missing for the month of May and June. On June 14 the dewblower was replaced. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/20/2011 | 0532 | 07/15/2011 | 0000 |
Subject: | PGH/MWR/M1 - Reprocessed: Incorrect calibration |
DataStreams: | pghmwrlosM1.b1, pghmwrtipM1.a1 |
Description: | When the radiometer started to collect data it was not at its final location and had an obstructed field of view. The radiometer was moved to its final location on 7/13/2011. After the radiometer was moved it started to collect good data for calibration. The MWRLOS data were reprocessed with appropriate calibrations. The reprocessed data were archived in July 2012. |
Measurements: | pghmwrtipM1.a1:
pghmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/20/2011 | 0532 | 03/27/2012 | 2359 |
Subject: | PGH/MWR/M1 - Reprocessed: Incorrect retrievals |
DataStreams: | pghmwrlosM1.b1, pghmwrtipM1.a1 |
Description: | The retrieval coefficients were incorrect because the site did not have a historical radiosonde database. MWRLOS data were reprocessed at the end of the deployment with correct retrieval coefficients. Reprocessed data were archived in July 2012 |
Measurements: | pghmwrtipM1.a1:
pghmwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/01/2011 | 0000 | 10/05/2011 | 2118 |
Subject: | GAN/MWR/M1 - Missing data |
DataStreams: | ganmwrlosM1.b1, ganmwrtipM1.a1 |
Description: | The MWR was unable to communicate with the software. The problem was identified as an incorrect port configuration. |
Measurements: | ganmwrlosM1.b1:
ganmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/05/2011 | 0000 | 10/10/2011 | 2359 |
Subject: | GAN/MWR/M1 - Sun in the radiometer's field of view |
DataStreams: | ganmwrlosM1.b1, ganmwrtipM1.a1 |
Description: | Between 10/5 and 10/10 the sun was in the field of view of the radiometer approximately between 7 and 8 AM UTC. The brightness temperature display a rapid increase followed by a rapid decrease during this time. |
Measurements: | ganmwrlosM1.b1:
ganmwrtipM1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/09/2011 | 0000 | 11/30/2011 | 2359 |
Subject: | TWP/MWR/C1 - Rain events not flagged |
DataStreams: | twpmwrlosC1.b1, twpmwrtipC1.a1 |
Description: | On some occasions the rain flag did not flag data during likely rain events. Users should carefully examine the data to ensure that they are not contaminated by rain. Also examine the brightness temperature qc variables. |
Measurements: | twpmwrtipC1.a1:
twpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/25/2011 | 0000 | 02/09/2012 | 0400 |
Subject: | GAN/MWR/M1 - Surface temperature failure |
DataStreams: | ganmwrlosM1.b1, ganmwrtipM1.a1 |
Description: | Between 12/25 and 2/9 the surface temperature readings were either wrong or missing. |
Measurements: | ganmwrlosM1.b1:
ganmwrtipM1.a1:
|