| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D081218.1 | SGP/SWATS/E7 - Soil temperature irregular, 125cm E | sgpswatsE7.b1 |
| D090320.2 | SGP/SWATS/E1 - Instrument failure | sgpswatsE1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/28/2008 | 1900 | 02/04/2009 | 2025 |
| Subject: | SGP/SWATS/E7 - Soil temperature irregular, 125cm E |
| DataStreams: | sgpswatsE7.b1 |
| Description: | The 125 cm E sensor was demonstrating temporal irregularities in its soil temperature measurements. These irregularities consisted of dips and increases of around 2-4 C that typically started around 14:00 or 15:00 GMT on most days. On other days the values appeared somewhat noisy throughout the day. In both cases, the temporal changes did not compare well with the other sensors installed at E7. A bad fiber optic cable was replaced. |
| Measurements: | sgpswatsE7.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/20/2009 | 0000 | 10/14/2009 | 1620 |
| Subject: | SGP/SWATS/E1 - Instrument failure |
| DataStreams: | sgpswatsE1.b1 |
| Description: | The diurnal temperature change in the tsoil measurements from all sensors installed below 5 cm at this facility appear questionable. On a daily basis, the diurnal trends in the tsoil measurements from depths below 5 cm did not match the above ground tref measurements or the tsoil measurements from the 5 cm W sensor (the 5 cm E sensor has failed). The tsoil measurements from these deeper sensors began to decrease prior to solar noon nearly every day. Also, the magnitudes of the diurnal change in these instruments appear to be the same for all sensors (Normally, the diurnal changes in tsoil are damped as we progress deeper below the surface). Attempts to correct the problem were unsuccessful until the time of site decommissioning. This facility was decommissioned and maintenance efforts ceased 10/1/2009. |
| Measurements: | sgpswatsE1.b1:
|