| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D021211.12 | NSA/GNDRAD/C1 - Noisy PIR Data | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
| D021212.8 | NSA/GNDRAD/C1 - Rad instruments shaded by shelter | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
| D090209.2 | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated | nsagndrad60sC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/01/1999 | 0000 | 12/31/2000 | 2359 |
| Subject: | NSA/GNDRAD/C1 - Noisy PIR Data |
| DataStreams: | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
| Description: | During the period referenced, the ground PIR was noisy in
comparison to the the sky PIR data. (Note U021211.1 documents
same problem for 9/1/98-2/28/99)
The noise problem continued after the GNDRAD data logger was
replaced in late September. Particularly strong examples of the
noise can be seen in data from 11/10 - 11/19/99. The peak to
peak noise reaches 12 W/m2. |
| Measurements: | nsagndrad60sC1.b1:
nsagndrad60sC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/08/1999 | 0000 | 09/30/1999 | 2359 |
| Subject: | NSA/GNDRAD/C1 - Rad instruments shaded by shelter |
| DataStreams: | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
| Description: | Each day around 02:00 - 03:30 GMT there is a unexpected decrease
for the PSP irradiance measurement due to a shading problem
associated with the swing set location relative to the instrument
shelter. The GNDRAD NET and MFR instrument data also reflects
this problem. Problem was resolved when the GNDRAD instruments
were moved to the 10 meter tip tower. |
| Measurements: | nsagndrad60sC1.b1:
nsagndrad60sC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/01/1999 | 0000 | 12/22/2000 | 2020 |
| Subject: | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated |
| DataStreams: | nsagndrad60sC1.b1 |
| 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.b1:
|