| DQR ID | Subject | Data Streams Affected | Data Quality Metric |
|---|---|---|---|
| D040615.5 | SGP/SIRS/E12 - Incorrect Times | sgpsirsE12.b1 | Suspect |
| D050109.3 | SGP/SIRS/E12 - Ice obscured NIP | sgpsirsE12.b1 | Incorrect |
| D050429.1 | SGP/SIRS/E12 - Reprocessed and Corrected: Incorrect calibrations | sgpsirsE12.b1 | Does not affect quality |
| D060630.20 | SGP/SIRS/E12 - Reprocessed: Longwave Calibration error | sgpsirsE12.b1 | Does not affect quality |
| D070927.2 | SGP/SIRS/E12 - Power supply problem affecting solar tracker | sgpsirsE12.b1 | Incorrect |
| D071220.2 | SGP/SIRS/E12 - Failed ventilator fan | sgpsirsE12.b1 | Suspect |
| D080128.1 | SGP/SIRS/C1/E1/E10/E11/E12/E13/E15/E16/E18/E19/E2/E20/E21/E22/E24/E25/E27/E3/E4/E5/E6/E7/E8/E9 - Ice | sgpsirsE12.b1 | Suspect |
| D090514.2 | SGP/SIRS/E12 - NIP failure | sgpsirsE12.b1 | Incorrect |
| D121018.8 | SGP/SIRS/E12 - Shadowband misalignment | sgpsirsE12.b1 | Incorrect |
| D150502.1 | SGP/SIRS/E12 - Lightning strike caused missing data | sgpsirsE12.b1 | Incorrect |
| D151117.1 | SGP/SIRS/E12 - Tracker failure | sgpsirsE12.b1 | Incorrect |
| D151201.2 | SGP ALL INSTRUMENTS - Icing Event | sgpsirsE12.b1 | Does not affect quality |
| D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpsirsE12.b1 | Does not affect quality |
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 02/19/2004 | 2212 | 03/10/2004 | 2247 | Suspect |
| Subject: | SGP/SIRS/E12 - Incorrect Times |
| DataStreams: | sgpsirsE12.b1 |
| Description: | The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the clock was corrected by -5600.177269 seconds on March 10th at 22:47 GMT. The recorded times for observations are off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds on March 10th. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 01/06/2005 | 0000 | 01/07/2005 | 2359 | Incorrect |
| Subject: | SGP/SIRS/E12 - Ice obscured NIP |
| DataStreams: | sgpsirsE12.b1 |
| Description: | During the morning hours of 01/06, the direct normal shortwave readings are anomalously low in clear sky conditions, causing very large differences (approaching/exceeding 300 W/m^2) between the downwelling shortwave hemispheric (DSH) readings and the derived downwelling shortwave hemispheric readings. It would appear the NIP window had iced over during the previous days storm. The NIP window appears to have cleared itself by the morning of 2005/01/08. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 04/26/2005 | 1726 | 05/03/2005 | 1840 | Does not affect quality |
| Subject: | SGP/SIRS/E12 - Reprocessed and Corrected: Incorrect calibrations |
| DataStreams: | sgpsirsE12.b1 |
| Description: | DATA REPROCESSED and CORRECTED: During a site corrective maintenance, the SIRS.E12 data logger was power cycled. The data logger reverted to an old SIRS program with incorrect S/Ns and calibration coefficients for all Instruments at this a station. The raw data were modified and were run through the ingest to recalibrate the SW and LW data. The data were Archived in August 2016. Please retrieve the reprocessed data for use in your Analysis. You may find these data using the ARM Discovery tool at the following link: http://www.archive.arm.gov/discovery/#v/results/s/finst::sirs/fsite::sgp/ffac::sgp.E12 ORIGINAL DQR CATEGORY: Red( Incorrect) REPROCESSED and CORRECTED DATA ARCHIVED:2016-08 REPROCESS IDENTIFICATION NUMBER: RID 202 --------------------------------------------------- --- ORIGINAL DQR DESCRIPTION --- --------------------------------------------------- During site corrective maintenance to resolve an Extended Facility data collection problem, the SIRS.E12 datalogger was power cycled (1725 GMT). The datalogger reverted to an old SIRS program with incorrect S/Ns and calibration coefficients for all instruments at this station. The SW data can be recalibrated as follows: First divide value by incorrectly applied cal coeff (first number) then multiply by correct cal coeff (second number) down_short_diffuse_hemisp 107.27 118.68 up_short_hemisp 113.19 127.95 short_direct_normal 120.17 120.52 down_short_hemisp 118.46 102.11 The LW data were recalibrated and reprocessed as part of a larger LW calibration task. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 07/22/2003 | 1640 | 02/14/2006 | 1710 | Does not affect quality |
| Subject: | SGP/SIRS/E12 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE12.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 08/28/2007 | 2000 | 08/31/2007 | 1630 | Incorrect |
| Subject: | SGP/SIRS/E12 - Power supply problem affecting solar tracker |
| DataStreams: | sgpsirsE12.b1 |
| Description: | The tracker failed during this time period due to a failed UPS. Tracker was placed on unregulated power on 8/31/2007 to correct the problem while a new UPS was ordered. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 06/19/2007 | 0000 | 08/14/2007 | 1700 | Suspect |
| Subject: | SGP/SIRS/E12 - Failed ventilator fan |
| DataStreams: | sgpsirsE12.b1 |
| Description: | Ventilator fan for the downwelling shortwave hemisheric failed during this time period. The thermal effects of daytime heating will skew the radiometric measurements of the thermopile instrument. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 12/10/2007 | 0000 | 12/25/2007 | 2359 | Suspect |
| Subject: |
|
| DataStreams: | sgpsirsE12.b1 |
| Description: | Ice storms affected the SGP central and extended facilities starting Dec 10 0000GMT to mid/late December. Each facility was affected at various times and degrees dependant on elevation, latitude and whether power failed for short or extended periods of time. By December 15th most ice had melted from the radiometers at all the faclities but power outages and tracker failures persisted at some stations. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 05/06/2009 | 1550 | 05/18/2009 | 1830 | Incorrect |
| Subject: | SGP/SIRS/E12 - NIP failure |
| DataStreams: | sgpsirsE12.b1 |
| Description: | The short_direct_normal values are mostly missing (-9999) starting when the datastream came back from an extended period of no data files. Ops determined the NIP (short_direct_normal datastream) instrument had failed and it was replaced. Values of short_direct_normal can be reconstructed using the following relationship applied for each time period: short_direct_normal = (down_short_hemisp - down_short_diffuse)/cos (zenith angle) |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 08/02/2012 | 1530 | 10/18/2012 | 1930 | Incorrect |
| Subject: | SGP/SIRS/E12 - Shadowband misalignment |
| DataStreams: | sgpsirsE12.b1 |
| Description: | The E12 tracker had failed from 7/20 to 8/2. The tracker was replaced and returned to service on 8/2. However, the tracker was not aligned correctly until 10/18. Data for short_direct_normal (NIP instrument) and down_short_diffuse (8-48 instrument) are bad and not recoverable during this entire time range. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 04/17/2015 | 1253 | 04/22/2015 | 1541 | Incorrect |
| Subject: | SGP/SIRS/E12 - Lightning strike caused missing data |
| DataStreams: | sgpsirsE12.b1 |
| Description: | |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 07/20/2012 | 0144 | 08/02/2012 | 1521 | Incorrect |
| Subject: | SGP/SIRS/E12 - Tracker failure |
| DataStreams: | sgpsirsE12.b1 |
| Description: | Tracker failed and instrument was not correctly tracking the sun. |
| Measurements: | sgpsirsE12.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: | sgpsirsE12.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: | sgpsirsE12.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: | sgpsirsE12.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: | sgpsirsE12.b1:
|