DQR ID | Subject | Data Streams Affected |
---|---|---|
D030917.17 | SGP/SIRS/E13 - Missing data due to Ice storm and clock problems | sgpsirsE13.00 |
D040608.3 | SGP/SIRS/E15 - NIP cable failure results in missing data | sgpsirsE15.00 |
D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirsE13.00 |
D050114.5 | SGP/SIRS/E15 - Failed NIP cable | sgpsirsE15.00 |
D050420.4 | SGP/SIRS/E13 - Adjust Direct Normal Irradiance | sgpsirsE13.01, sgpsirsE13.00 |
D050601.1 | SGP/SIRS/E13 - Reprocess: incorrect calibrations | sgpsirsE13.00 |
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 | sgpsirsE13.00, sgpsirsE15.00 |
D121003.1 | SGP/SIRS/E13 - Instrument problem | sgpsirsE13.01, sgpsirsE13.00 |
D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpsirsE13.00, sgpsirsE15.00, sgpsirsE15.01, sgpsirsE13.01 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/13/2002 | 1806 | 03/14/2002 | 1607 |
03/09/2002 | 2006 | 03/10/2002 | 1902 |
Subject: | SGP/SIRS/E13 - Missing data due to Ice storm and clock problems |
DataStreams: | sgpsirsE13.00 |
Description: | Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems. |
Measurements: | sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/03/2004 | 1122 | 06/08/2004 | 1700 |
Subject: | SGP/SIRS/E15 - NIP cable failure results in missing data |
DataStreams: | sgpsirsE15.00 |
Description: | The NIP began reporting -9999 (missing) for all direct normal downwelling shortwave radiation. Maintenance 6/8 revealed a broken cable. Cable was repaired and NIP data returned to normal. |
Measurements: | sgpsirsE15.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2004 | 1830 | 09/07/2004 | 2130 |
Subject: | SGP/SIRS/C1/E13 - Incorrect calibration coefficients |
DataStreams: | sgpsirsE13.00 |
Description: | After the DIR changeout on 8/27, the DLH measurements at the central facility vary significantly between pyrgeometers by as much as 65 Wm^(-2). It was discovered that the two downwelling pyrgeometers destined for C1 and E13 may have been swapped during installation. The instrument mentor is unsure of applied calibration coefficients during this DQR's time period. Backing out new downwelling longwave irradiances would be difficult in this case. Fortunately, the problem period is less than a fortnight. |
Measurements: | sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/2005 | 0849 | 01/18/2005 | 1900 |
Subject: | SGP/SIRS/E15 - Failed NIP cable |
DataStreams: | sgpsirsE15.00 |
Description: | After the ice storm, the SHORT_DIRECT_NORMAL values were bad or missing continuously. Corrective Maintenance on 01/18 found the NIP cable had broken inside the Bendix connector. The NIP cable was repaired and returned to service. |
Measurements: | sgpsirsE15.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/03/2000 | 1330 | 08/15/2001 | 1500 |
Subject: | SGP/SIRS/E13 - Adjust Direct Normal Irradiance |
DataStreams: | sgpsirsE13.01, sgpsirsE13.00 |
Description: | Direct normal broadband shortwave irradiance measured by NIP s/n 30585E6 was found to have a 1.76% negative bias when compared in-situ with absolute cavity radiometer measurements taken on August 21, 2000. The estimated measurement uncertainty of the calibration of NIP s/n 30585E6 on July 18, 2000 was -2.2% to +2.8%. Data from NIP s/n 30585E6 can be adjusted according to the in-situ comparisons to reduce the apparent measurement bias. |
Measurements: | sgpsirsE13.01:
sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2005 | 1409 | 06/02/2005 | 2205 |
Subject: | SGP/SIRS/E13 - Reprocess: incorrect calibrations |
DataStreams: | sgpsirsE13.00 |
Description: | After a long data gap on 5/25/2005, presumably a power outage, the following datastreams were showing incorrect values as well as incorrect calibration coefficients in the datalogger program: down_long_hemisp_shaded (downwelling PIR instrument) up_long_hemisp (upwelling PIR instrument) short_direct_normal (NIP instrument) The SIRS.E13 datalogger was power cycled (6/2/2005 2200GMT) and the correct program loaded into the SIRS datalogger and storage module. The data during this time range can be recalibrated as follows: First divide value by incorrectly applied cal coeff (first number) then multiply by correct cal coeff (second number) short_direct_normal 120.28 124.58 up_long_netir 0.2386 0.2595 down_long_netir 0.3052 0.2304 Reapply cal coeffs below using up_long_netIR(uV), inst_up_long_dome_temp(K), inst_up_long_dome_temp(K) using procedure described in SIRS instrument manual. up_long_hemisp k0 -18.3400 W/m^2\n, k1 0.2595 W/(m^2*uV)\n, k2 1.0380 unitless\n, k3 -2.7420 unitless\n, kr 0.0007044 K/uV\n, Reapply cal coeffs below using down_long_netIR(uV),inst_down_long_dome_temp (K),inst_down_long_dome_temp(K). down_long_hemisp_shaded k0 -11.6300 W/m^2\n, k1 0.2304 W/(m^2*uV)\n, k2 1.0190 unitless\n, k3 -2.4230 unitless\n, kr 0.0007044 K/uV\n, |
Measurements: | sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/10/2007 | 0000 | 12/25/2007 | 2359 |
Subject: |
|
DataStreams: | sgpsirsE13.00, sgpsirsE15.00 |
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: | sgpsirsE15.00:
sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2012 | 0000 | 09/20/2012 | 2045 |
Subject: | SGP/SIRS/E13 - Instrument problem |
DataStreams: | sgpsirsE13.01, sgpsirsE13.00 |
Description: | up_long_hemisp measurements are intermittant and remain so after extensive troubleshooting. This problem will likly remain open ended until site ops can replace the cable which serves the up_long_hemisp instrument (i.e. the Eppley PIR). |
Measurements: | sgpsirsE13.01:
sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/26/2015 | 0000 | 01/01/2016 | 2359 |
Subject: | SGP Site Power Outage Due to Winter Storm |
DataStreams: | sgpsirsE13.00, sgpsirsE15.00, sgpsirsE15.01, sgpsirsE13.01 |
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: | sgpsirsE13.01:
sgpsirsE15.00:
sgpsirsE13.00:
sgpsirsE15.01:
|