DQR ID | Subject | Data Streams Affected |
---|---|---|
D111017.1 | GAN/GNDRAD/M1 - IRT calibration error | gangndrad60sM1.b1 |
D111101.1 | GAN/GNDRAD/M1 - Incorrect up_long_hemisp | gangndrad20sM1.a0, gangndrad60sM1.b1 |
D120113.7 | GAN/SKYRAD/M1 - Degraded IRT mirror | ganskyrad60sM1.b1 |
D120127.1 | GAN/SKYRAD/M1 - PIR2 failure | ganskyrad20sM1.a0, ganskyrad60sM1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/23/2011 | 0742 | 10/09/2011 | 0413 |
Subject: | GAN/GNDRAD/M1 - IRT calibration error |
DataStreams: | gangndrad60sM1.b1 |
Description: | The IRT surface temperature reported was incorrect because the analog output configuration did not agree with the data logger scale factors. The IRT configuration was corrected on 10/9. |
Measurements: | gangndrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/25/2011 | 0000 | 10/05/2011 | 0444 |
Subject: | GAN/GNDRAD/M1 - Incorrect up_long_hemisp |
DataStreams: | gangndrad20sM1.a0, gangndrad60sM1.b1 |
Description: | The up_long_hemisp values from the pyrgeometer were much too low, hovering near or just above 100 W/m^2. This was particularly noticeable when comparing these values to those derived from the surface IRT. On 10/05/11, at 0348Z, tower was lowered for removal of PIR SN35836 and installation of PIR SN35839; tower raised at 0444Z. Following installation of PIR SN35839, data quality plots indicate proper up_long_hemisp values. |
Measurements: | gangndrad20sM1.a0:
gangndrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/2011 | 1424 | 01/04/2012 | 0529 |
Subject: | GAN/SKYRAD/M1 - Degraded IRT mirror |
DataStreams: | ganskyrad60sM1.b1 |
Description: | The gold mirror was worn and needed to be replaced. Degradation of the mirror occurs gradually and it is difficult to determine when it begins to affect the measurement. To estimate the beginning of the problem, I used the time when the difference in IR sky temperature from the MWR3C was consistantly greater that 2.4K (2 times the resolution of the IRT measurement). The problem was corrected when the mirror was replaced. |
Measurements: | ganskyrad60sM1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/12/2011 | 0000 | 12/27/2011 | 0542 |
Subject: | GAN/SKYRAD/M1 - PIR2 failure |
DataStreams: | ganskyrad20sM1.a0, ganskyrad60sM1.b1 |
Description: | Increasing difference between PIR1 and PIR2 beginning December 12. Suspected problem with PIR2 thermistor bridge or instrument thermistor. OPS replaced PIR2 unit with a spare. The data from PIR2 after replacement appears to be normal. |
Measurements: | ganskyrad60sM1.b1:
ganskyrad20sM1.a0:
|