| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 02/21/2009 | 0445 | 03/04/2009 | 2359 | Suspect |
| 01/13/2009 | 1602 | 01/20/2009 | 2359 | Suspect |
| 08/07/2001 | 1300 | 10/23/2001 | 2359 | Suspect |
| 05/15/2009 | 1130 | 10/14/2009 | 2359 | Suspect |
| Subject: | SGP/QCRAD/E1 - Tracker malfunction |
| DataStreams: | sgpqcrad1longE1.s2, sgpqcrad1longE1.c2 |
| Description: | The solar tracker was inoperative during these time periods indicating that the shortwave direct normal, the shortwave diffuse, and possibly the downwelling longwave irradiance are inaccurate. This also impacts the best estimate value because the sum of direct and diffuse cannot be used, and some tests can't be applied to the data. Some problems documented in instrument DQRs: D090520.1 & D090121.1 |
| Suggestions: | Don't use SW direct or diffuse data during these time periods. If "source_BestEstimate_down_short_hemisp" is 0, don't use Best Estimate GSW data. Note that fewer quality checks can be applied accurately to the BestEstimate data. Use caution with downwelling longwave irradiance. |
| Measurements: | sgpqcrad1longE1.c2: more
sgpqcrad1longE1.s2: more |