DQR ID | Subject | Data Streams Affected |
---|---|---|
D040904.2 | TWP/SKYRAD/C3 - Incorrect NIP cal coefficient | twpskyrad60sC3.b1 |
D050104.1 | TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect | twpskyrad60sC3.b1, twpskyradC3.00 |
D060209.4 | NSA/GNDRAD/C1 - power outage affecting some GNDRAD sensors | nsagndrad20sC1.a0, nsagndrad60sC1.b1, nsagndradC1.00 |
D060630.39 | NSA/GNDRAD/C1 - Reprocess: Longwave Calibration error | nsagndrad60sC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/24/2004 | 0000 | 09/02/2004 | 2350 |
Subject: | TWP/SKYRAD/C3 - Incorrect NIP cal coefficient |
DataStreams: | twpskyrad60sC3.b1 |
Description: | During our site visit comparison at Darwin we observed that the skyrad NIP was reading about 50 w/m2 lower than the comparison cavity radfiometer and the replacement NIP on the comparison stand. We found that the calibration coefficient for the NIP (responsivity at 45o)was put in as 8.64X10-6. The NIP was new and had not been calibrated at SGP. The factory number was 8.04X10-6. We corrected the calibration coefficient and the instruments agreed to better than 5 w/m2. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2004 | 0000 | 09/02/2004 | 0400 |
Subject: | TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect |
DataStreams: | twpskyrad60sC3.b1, twpskyradC3.00 |
Description: | On 05/20 during installtion of the new Campbell datalogger system and associated program the NIP (S/N 33551E6) was assigned an incorrect calibration coefficient. A coefficient of 116.01 W/m2/mV was applied when it should have been 124.378 W/m2/mV. TWP reports SV0405D and SV0409D detail the activities which lead to this DQR. |
Measurements: | twpskyradC3.00:
twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/2006 | 0910 | 02/07/2006 | 2350 |
Subject: | NSA/GNDRAD/C1 - power outage affecting some GNDRAD sensors |
DataStreams: | nsagndrad20sC1.a0, nsagndrad60sC1.b1, nsagndradC1.00 |
Description: | During the power outage the upwelling global measurement from the PSP instrument shows a slight increase from -5 to +0 W/m2. This is due to removal of thermal offsets induced by the AC heater during the power outage. This heater is installed within the PSP ventilator - it is necessary for the NSA/C1 climate. The upwelling longwave PIR instrument is unaffected due to case and dome temperature corrections. The IRT is AC powered and was not operational during this time period. |
Measurements: | nsagndradC1.00:
nsagndrad20sC1.a0:
nsagndrad60sC1.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:
|