DQR ID | Subject | Data Streams Affected |
---|---|---|
D040919.1 | NSA/GNDRAD/C1 - IRT power failure | nsagndrad60sC1.b1 |
D041013.3 | NSA/GNDRAD/C1 - Frosting/Condensation | nsagndrad20sC1.a1, nsagndrad60sC1.b1, nsagndradC1.00 |
D050825.3 | NSA/GNDRAD/C1 - Power Disconnected Briefly | nsagndrad60sC1.b1 |
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 |
---|---|---|---|
09/15/2004 | 0000 | 09/22/2004 | 0552 |
Subject: | NSA/GNDRAD/C1 - IRT power failure |
DataStreams: | nsagndrad60sC1.b1 |
Description: | After performing corrective maintenance which involved turning off power to the GNDRAD instruments and data logger, power to the IRT was not restored. The problem was corrected by replacing the data logger. |
Measurements: | nsagndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2004 | 0000 | 10/15/2004 | 2359 |
Subject: | NSA/GNDRAD/C1 - Frosting/Condensation |
DataStreams: | nsagndrad20sC1.a1, nsagndrad60sC1.b1, nsagndradC1.00 |
Description: | The GNDRAD PIR and IRT comparison was showing the IRT 2-4 W/m^2 greater than the PIR. Suspected snow or frost on the instrument(s). Corrective maintenance performed 10/15/04 at 21:30 UT. Optics of both instruments were cleaned. Upwelling longwave measurement agreement restored (+/- 5 W/^2). Although the relative performance (agreement) of the two instruments improved after corrective maintenance (+/- 2 W/m^2), no correction is suggested because the agreement remains with the estimated measurement uncertainty of +/- 4 W/m^2 (IRT) and +/-10 W/m^2 (Inverted PIR) |
Measurements: | nsagndradC1.00:
nsagndrad60sC1.b1:
nsagndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/24/2005 | 0030 | 08/24/2005 | 0030 |
Subject: | NSA/GNDRAD/C1 - Power Disconnected Briefly |
DataStreams: | nsagndrad60sC1.b1 |
Description: | Power to the Tip tower and Groundrad was disconnected briefly while ground resistance measurements were made. The following comments are from Inst. Mentor Tom Stoffel: The longwave and shortwave irradiances from GNDRAD were not effected by the temporary power disconnect. Data are good. This would have only stopped the ventilators for a brief time and the data do not show any signs of poor instrument responses. The "sfc_ir_temp" data were, however, impacted during the brief (2 readings?) interval. |
Measurements: | nsagndrad60sC1.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:
|