DQR ID | Subject | Data Streams Affected |
---|---|---|
D021004.20 | NSA/GNDRAD/C1 - PIR thermopile instantaneous values intermittently read zero | nsagndrad20sC1.a1 |
D021211.11 | NSA/GNDRAD/C1 - Noisy PIR Data | nsagndrad60sC1.a1 |
D080725.1 | NSA/GNDRAD/C1 - IRT not connected | nsagndrad60sC1.a1 |
D990924.1 | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated | nsagndrad60sC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/1998 | 2157 | 03/31/2001 | 2359 |
Subject: | NSA/GNDRAD/C1 - PIR thermopile instantaneous values intermittently read zero |
DataStreams: | nsagndrad20sC1.a1 |
Description: | GNDRAD intermittently reported false zero values for the third instantaneous value (50 sec after the minute) of the PIR thermopile voltage. |
Measurements: | nsagndrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/01/1998 | 0000 | 02/28/1999 | 2359 |
Subject: | NSA/GNDRAD/C1 - Noisy PIR Data |
DataStreams: | nsagndrad60sC1.a1 |
Description: | During the period referenced, the ground PIR was noisy in comparison to the sky PIR data. At the end of November, the noise increased to roughly 10 W/m2 from peak to peak. After 12/23/98, the noise decreased in amplitude but still had noisy patterns. On 01/17-18/99, there was an increase again in the noise level (4 GMT 01/17 - 5 GMT 01/18). During this period the gndrad IRT data also exhibited noise patterns (the IRT was not operational). In February, the instrument exhibited large noise variations again. On 02/16, a wiring problem was corrected and the noise dropped back to 1-5 W/m2. However, the noise levels began to increase again. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/10/1998 | 2200 | 01/20/1999 | 0059 |
Subject: | NSA/GNDRAD/C1 - IRT not connected |
DataStreams: | nsagndrad60sC1.a1 |
Description: | The IRT was unplugged from the Zeno data logger on 12/10/1998 for a interference test and when it was plugged back in on 12/22, the connector at the data logger was damaged. The data logger and connecter were replaced on 1/20/1999. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/1998 | 2156 | 12/22/2000 | 2020 |
Subject: | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated |
DataStreams: | nsagndrad60sC1.a1 |
Description: | IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of surface temperature were over-estimated when instrument was below freezing. Data will be reprocessed, but users can correct data using the following correction factor: If T_reference < -5?C, then IRT_corrected = (IRT_original - 32.993K)/0.87238 where T_reference can be estimated with the ambient temperature (e.g. inst_up_long_hemisp_dome_temp or inst_up_long_dome_temp) |
Measurements: | nsagndrad60sC1.a1:
|