| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D021213.2 | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
| D021213.4 | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
| D031007.2 | NSA/SKYRAD/C1 - IRT measurements during precipitation events | nsaskyrad60sC1.b1 |
| D060724.2 | NSA/SKYRAD/C1 - Summer solstice shading of radiometers | nsaskyrad60sC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/01/1999 | 0000 | 08/10/1999 | 0000 |
| 05/01/2000 | 0000 | 08/10/2000 | 0000 |
| 05/01/2001 | 0000 | 08/10/2001 | 0000 |
| 05/01/2002 | 0000 | 08/10/2002 | 0000 |
| Subject: | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight |
| DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
| Description: | Around local midnight 9:30-10:30 GMT during summer clear sky the normal incidence pyranometer is shaded by the instrument stand.This causes the reading to be 0 W/m2. If cosine correction is applied for irradiance calulations this effect is negligible due to the low solar angle. |
| Measurements: | nsaskyrad60sC1.a1:
nsaskyrad60sC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/01/1999 | 0000 | 08/10/1999 | 0000 |
| 05/01/2000 | 0000 | 08/10/2000 | 0000 |
| 05/01/2001 | 0000 | 08/10/2001 | 0000 |
| 05/01/2002 | 0000 | 08/10/2002 | 0000 |
| Subject: | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight |
| DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
| Description: | Just past local midnight (11:00-11:40 GMT during summer clear sky) the global hemispherical pyranometer is shaded by the MFRSR instrument for about 40 minutes. This causes the reading to be 0 W/m2. This effect would be negligible in a daily average due to the low solar angle. |
| Measurements: | nsaskyrad60sC1.a1:
nsaskyrad60sC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/01/1999 | 0000 | 03/28/2003 | 0200 |
| Subject: | NSA/SKYRAD/C1 - IRT measurements during precipitation events |
| DataStreams: | nsaskyrad60sC1.b1 |
| Description: | The IRT measurement of sky/cloud temperature was in question during precipitation events because rain or snow could accumulate in the upward-pointed lens barrel. This was corrected by reorienting the IRT to measure the sky temperature as reflected by a gold mirror. |
| Measurements: | nsaskyrad60sC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/08/1999 | 0000 | 08/05/1999 | 0000 |
| 05/08/2000 | 0000 | 08/05/2000 | 0000 |
| 05/08/2001 | 0000 | 08/05/2001 | 0000 |
| 05/08/2002 | 0000 | 08/05/2002 | 0000 |
| 05/08/2003 | 0000 | 08/05/2003 | 0000 |
| 05/08/2004 | 0000 | 08/05/2004 | 0000 |
| 05/08/2005 | 0000 | 08/05/2005 | 0000 |
| 05/08/2006 | 0000 | 08/05/2006 | 0000 |
| Subject: | NSA/SKYRAD/C1 - Summer solstice shading of radiometers |
| DataStreams: | nsaskyrad60sC1.b1 |
| Description: | On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP (global hemispheic shortwave measurement) radiometers are shaded by other instruments or support structures. Shading azimuths have been determined for this site. The radiometer mentor suggests not using the data from the NIP and PSP radiometers when the sun is within the following azimuth bounds (typically from May 8th to August 5th of each year): Instrmt Obstruction AzStart AzEnd NIP rad table 346 358 NIP met tower 13 15 PSP mfrsr 6 16 |
| Measurements: | nsaskyrad60sC1.b1:
|