DQR ID | Subject | Data Streams Affected |
---|---|---|
D020920.4 | SGP/SWATS/E1 - Reprocess: Wrong Calibration | sgpswatsE1.00, sgpswatsE1.a1, sgpswatsE1.b1 |
D040213.1 | SGP/SWATS/E1 - Incorrect Soil Moisture Data, 5cm E | sgpswatsE1.b1 |
D050223.4 | SGP/SWATS/E1 - Questionable Soil Moisture Data | sgpswatsE1.b1 |
D090320.2 | SGP/SWATS/E1 - Instrument failure | sgpswatsE1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/1996 | 0000 | 08/02/2000 | 1450 |
Subject: | SGP/SWATS/E1 - Reprocess: Wrong Calibration |
DataStreams: | sgpswatsE1.00, sgpswatsE1.a1, sgpswatsE1.b1 |
Description: | Two sensor connections were switched. The East 125-cm sensor was plugged into the East 85-cm sensor's connection, and vice versa. Technicians corrected the problem on 1440 GMT, 08/02/00, and returned the instrument to service 10 minutes later at 1450 GMT. As the datalogger was confusing the 2 sensors, incorrect calibrations were applied. The correct calibrations can be applied to the raw data to obtain the correct temperature rises, soil moisture, etc. However, this is a rather large amount of work to apply toward just 1 measurement profile. This has been identified as a medium priority reprocessing task. |
Measurements: | sgpswatsE1.a1:
sgpswatsE1.00:
sgpswatsE1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/2004 | 2000 | 02/18/2004 | 2100 |
Subject: | SGP/SWATS/E1 - Incorrect Soil Moisture Data, 5cm E |
DataStreams: | sgpswatsE1.b1 |
Description: | The temperature rise readings from the 5-cm depth on the east profile (trise_E) were incorrect. This also caused the matric potential (soilwatpot_E) and water content (watcont_E) data for the 5-cm depth to be incorrect. |
Measurements: | sgpswatsE1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/14/2005 | 0630 | 01/23/2005 | 2330 |
Subject: | SGP/SWATS/E1 - Questionable Soil Moisture Data |
DataStreams: | sgpswatsE1.b1 |
Description: | Between the 06GMT and 07GMT measurements on January 14th, it appears that some sort of non-atmospheric moisture source affected the 4 shallowest sensors (5-cm West & East, 15-cm West & East). No precipitation was recorded at the site, but data indicate a sharp increase in soil moisture that caused suspicious behavior that gradually lessened through January 23rd. Animal intrusion, but more probably adolescent mischief, is suspected. Be aware that the soil moisture responses on January 14th most likely are not due to natural causes. For the remainder of the period, soil moisture measurements at 5cm and 15cm may be adversely affected. |
Measurements: | sgpswatsE1.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:
|