DQR ID | Subject | Data Streams Affected |
---|---|---|
D050726.4 | PYE/MWR/M1 - Reprocessed: Calibration corrected | pyemwrlosM1.b1, pyemwrtipM1.a1 |
D050902.2 | PYE/MWRP/M1 - Bias in Ground Relative Humidity Measurement | pyemwrpM1.00, pyemwrpM1.b1 |
D050927.1 | PYE/MWR/M1 - New software version (4.15) installed | pyemwrlosM1.b1, pyemwrtipM1.a1 |
D060630.44 | PYE/GNDRAD/M1 - Reprocess: Longwave Calibration error | pyegndrad60sM1.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: | pyemwrtipM1.a1:
pyemwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2005 | 0000 | 09/03/2005 | 0000 |
Subject: | PYE/MWRP/M1 - Bias in Ground Relative Humidity Measurement |
DataStreams: | pyemwrpM1.00, pyemwrpM1.b1 |
Description: | On June 17 2005, the MWRP was re-installed at PYE after the Super Blower was replaced by the old style dew blower. The relative humidity ground sensor in the dew blower is not as accurate. This resulted in a negative relative humidity bias of about 5.9 %. In other words the MWRP sensor was underestimating the relative humidity. The bias was determined by comparing MWRP measurements with SMET and radiosonde measurements. The MP.cfg file for the MWRP was changed to reflect this bias on 09/02/2005 and will take effect on 09/03/2005 0000 GMT |
Measurements: | pyemwrpM1.b1:
pyemwrpM1.00:
|
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: | pyemwrtipM1.a1:
pyemwrlosM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2005 | 0000 | 09/14/2005 | 0000 |
Subject: | PYE/GNDRAD/M1 - Reprocess: Longwave Calibration error |
DataStreams: | pyegndrad60sM1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | pyegndrad60sM1.b1:
|