DQR ID | Subject | Data Streams Affected |
---|---|---|
D040421.3 | NSA/SKYRAD/C1 - itermittant IRT bias | nsaskyrad60sC1.b1 |
D051101.2 | NSA/SKYRAD/C1 - IRT failure | nsaskyrad60sC1.b1 |
D060630.39 | NSA/GNDRAD/C1 - Reprocess: Longwave Calibration error | nsagndrad60sC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/28/2003 | 0200 | 06/21/2006 | 0215 |
Subject: | NSA/SKYRAD/C1 - itermittant IRT bias |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky temperature measurement then a sudden correction, as compared to AERI, appears to have been caused by a combination of a failing IR detector, a poor signal cable, a contaminated (with condensation or frost) mirror or lens, and low ambient temperatures. The positive bias was apparently not consistant in either frequency or duration but on days when the unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. The instrument was repaired and recalibrated and the signal cable replaced. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2005 | 0600 | 01/18/2006 | 0032 |
Subject: | NSA/SKYRAD/C1 - IRT failure |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The IRT failed and was replaced with a spare. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/04/2004 | 1600 | 12/21/2005 | 1855 |
Subject: | NSA/GNDRAD/C1 - Reprocess: Longwave Calibration error |
DataStreams: | nsagndrad60sC1.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: | nsagndrad60sC1.b1:
|