DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D070912.1 | SGP/IRT/E13 - Missing data | sgpirtE13.b1 | Missing |
D080131.1 | SGP/IRT/E13 - Reprocess: Sky temperature bias | sgpirtE13.b1 | Suspect |
D081216.3 | SGP/IRT/E13 - Reprocess: Sensor Calibration | sgpirtE13.b1 | Suspect |
D081217.1 | SGP/IRT/E13 - Reprocessing Notice (RID 545) | sgpirtE13.b1 | Does not affect quality |
D091215.5 | SGP/IRT/E13 - Response time | sgpirtE13.b1 | Does not affect quality |
D101215.3 | SGP/IRT/E13 - Instrument output invalid | sgpirtE13.b1 | Incorrect |
D120724.2 | SGP/IRT/E13 - Bird intrusion | sgpirtE13.b1 | Suspect |
D130618.4 | SGP/IRT/E13 - Mirror contamination | sgpirtE13.b1 | Suspect |
D141107.4 | SGP/IRT/E13 - Sky temperature too warm | sgpirtE13.b1 | Incorrect |
D151201.2 | SGP ALL INSTRUMENTS - Icing Event | sgpirtE13.b1 | Does not affect quality |
D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpirtE13.b1 | Does not affect quality |
D160212.4 | SGP/IRT/E13 - Data system Upgrades: Data Missing | sgpirtE13.b1 | Missing |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/13/2008 | 2040 | 02/22/2008 | 1815 | Missing |
01/28/2008 | 1857 | 01/30/2008 | 1631 | Missing |
03/02/2008 | 0430 | 03/07/2008 | 1736 | Missing |
08/29/2007 | 1328 | 09/06/2007 | 2000 | Missing |
05/03/2008 | 1756 | 05/27/2008 | 1148 | Missing |
02/09/2008 | 2002 | 02/13/2008 | 1414 | Missing |
03/09/2008 | 2200 | 05/02/2008 | 2209 | Missing |
12/22/2007 | 1848 | 12/26/2007 | 2006 | Missing |
09/08/2007 | 0700 | 09/10/2007 | 1937 | Missing |
05/27/2008 | 1732 | 08/04/2008 | 0708 | Missing |
08/04/2008 | 1400 | 10/16/2008 | 2018 | Missing |
10/11/2007 | 0156 | 10/31/2007 | 1852 | Missing |
01/07/2008 | 0000 | 01/10/2008 | 1430 | Missing |
09/11/2007 | 0001 | 09/19/2007 | 1410 | Missing |
07/25/2007 | 2200 | 07/27/2007 | 1457 | Missing |
09/20/2007 | 0151 | 10/10/2007 | 2118 | Missing |
Subject: | SGP/IRT/E13 - Missing data |
DataStreams: | sgpirtE13.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/11/2006 | 0000 | 07/25/2007 | 2315 | Suspect |
Subject: | SGP/IRT/E13 - Reprocess: Sky temperature bias |
DataStreams: | sgpirtE13.b1 |
Description: | Measurements of sky temperature, especially those <250K,, were positively biased compared with AERI because there was no compensation for the effect of the emissivity and temperature of the gold mirror. The problem was corrected by changing the IRT emissivity from 1.000 to 0.987, adding an RTD and transmitter electronics to measure the temperature of the mirror, and changing the ambient temperature measurement for internal reference to external mirror temperature. Use sky temperature measurements less than 230K with caution. Biases as large as 30K have been observed when the actual temperature, as measured by AERI, is less than 210 K. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/20/2008 | 1607 | 02/12/2009 | 2140 | Suspect |
Subject: | SGP/IRT/E13 - Reprocess: Sensor Calibration |
DataStreams: | sgpirtE13.b1 |
Description: | The measurements are greater than AERI, especially when sky temperature is less than -40C. The lens and mirror was cleaned on 11/21/2008 and the mirror was replaced on 1/28/2009 but these actions did not correct the problem. It was learned that the internal calibration factor was not changed by the manufacturer after the unit was repaired and recalibrated on 9/6/2007. The calibration factor was corrected from 1.2172 to 1.4100 on 2/12/2009. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/12/2008 | 2110 | 10/27/2008 | 2030 | Does not affect quality |
Subject: | SGP/IRT/E13 - Reprocessing Notice (RID 545) |
DataStreams: | sgpirtE13.b1 |
Description: | See below for details of reprocessing that was completed on 20150113. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- While diagnosing serial communication problems, the IRT configuration was reset to factory defaults so the temperature unit parameter was set to C instead of K. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/11/2006 | 0000 | 03/17/2006 | 2359 | Does not affect quality |
Subject: | SGP/IRT/E13 - Response time |
DataStreams: | sgpirtE13.b1 |
Description: | The time response of the temperature measurement was changed from 1.0 to 0.1 sec to accommodate the 5Hz sample rate. This caused a 370% decrease in the resolution (to 1.85C at a sky temperature of -50C) and a significant decrease in the signal-to-noise ratio. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/09/2010 | 1534 | 10/04/2010 | 1445 | Incorrect |
Subject: | SGP/IRT/E13 - Instrument output invalid |
DataStreams: | sgpirtE13.b1 |
Description: | The signal was missing for 25 min and then changed to a constant values of sky_ir_temp=262.22K and ref_ir_temp=313.10K. The problem was corrected when the intrument was power-cycled. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/27/2012 | 1700 | 06/06/2012 | 1445 | Suspect |
Subject: | SGP/IRT/E13 - Bird intrusion |
DataStreams: | sgpirtE13.b1 |
Description: | A bird entered and nested inside the enclosure. The measurement of sky temperature was interrupted everytime the bird was in the field-of-view. The nest was removed on 5/10 and 5/24 in attempts to discourage the bird but it persisted on rebuilding the nest until 6/6 when the nest was replaced with bird deterrent spikes. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/22/2012 | 0000 | 06/17/2013 | 1805 | Suspect |
Subject: | SGP/IRT/E13 - Mirror contamination |
DataStreams: | sgpirtE13.b1 |
Description: | The sky temperature was abnormally high compared to all other sites and the AERI. The gold mirror was found to be worn (mostly by birds nesting inside the enclosure) and was replaced. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/19/2014 | 0000 | 10/31/2014 | 1553 | Incorrect |
Subject: | SGP/IRT/E13 - Sky temperature too warm |
DataStreams: | sgpirtE13.b1 |
Description: | The sky temperature exhibited a "stepped feature" and was ~10K larger than that measured by AERI and MWR3C, increasing to ~50K on 10/26. The IRT was replaced. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/27/2015 | 0000 | 11/30/2015 | 2359 | Does not affect quality |
Subject: | SGP ALL INSTRUMENTS - Icing Event |
DataStreams: | sgpirtE13.b1 |
Description: | An icing event (winter storm Cara) passed slowly through the area during this time frame. Instruments at the SGP may have been affected by ice accumulation. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/26/2015 | 0000 | 01/01/2016 | 2359 | Does not affect quality |
Subject: | SGP Site Power Outage Due to Winter Storm |
DataStreams: | sgpirtE13.b1 |
Description: | On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result was very very slick roads and mass power outages. The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th. The power was restored on 7:56 PM CDT on Wednesday, December 30th Site Emergency procedures were activated and Technicians drained water out of instrument reservoirs and other measures as needed, early Monday morning. On Wednesdays as roads and power started was restored to much of the areas east of I-35 , Site Technicians performed maintenance on several Extended Facilities. During this period, data are potentially missing, incorrect, or suspect. Carefully inspect the data before use. |
Measurements: | sgpirtE13.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/26/2016 | 1800 | 01/29/2016 | 1440 | Missing |
Subject: | SGP/IRT/E13 - Data system Upgrades: Data Missing |
DataStreams: | sgpirtE13.b1 |
Description: | The site data system was upgraded. Data were not collected during this period. |
Measurements: | sgpirtE13.b1:
|