DQR ID | Subject | Data Streams Affected |
---|---|---|
D000907.1 | SGP/SIRS/E24 - SIRS Signal Cable Damage at E24 | sgpsirsE24.00, sgpsirsE24.01 |
D020402.1 | SGP/SIRS/E24 - bad records in sneakernet data file | sgpsirsE24.01 |
D030529.3 | SGP/SIRS/E21 - Shadowband Misalignment/Tracker Failure | sgpsirsE21.00 |
D030612.1 | SGP/SIRS/E21 - Shadowband Misalignment/Tracker Failure | sgpsirsE21.00 |
D030722.2 | SGP/SIRS/E21 - Shadowband Misalignment | sgpsirsE21.00 |
D031020.4 | SGP/SIRS/E21 - Bird Poop Contamination | sgpsirsE21.00 |
D040126.3 | SGP/SIRS/E21 - False signal | sgpsirsE21.00 |
D040229.2 | SGP/SIRS/E21 - Shadowband Misalignment | sgpsirsE21.00 |
D040329.1 | SGP/SIRS/E21 - Instrument logger time problem, Unknown | sgpsirsE21.00 |
D040601.1 | SGP/SIRS/E21 - Dirt on dome | sgpsirsE21.00 |
D040706.1 | SGP/SIRS/E22 - Failed NIP sensor cable | sgpsirsE22.00 |
D050227.1 | SGP/SIRS/E24 - Erratic downwelling shortwave data | sgpsirsE24.00 |
D050412.3 | SGP/SIRS/E24 - Dirt on dome | sgpsirsE24.00 |
D050520.1 | SGP/SIRS/E22 - Intermittent upwelling longwave data loss | sgpsirsE22.00 |
D051117.1 | SGP/SIRS/E24 - Reprocessing Notice (RID 216) | sgpsirsE24.00 |
D060405.1 | SGP/SIRS/E24 - Reprocessing Notice (RID 257) | sgpsirsE24.00 |
D060424.1 | SGP/SIRS/E21 - Roosting birds in field of view | sgpsirsE21.00 |
D070320.1 | SGP/SIRS/E22 - Reprocess: Incorrect calibration coefficients | sgpsirsE22.00 |
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 | sgpsirsE22.00, sgpsirsE21.00, sgpsirsE24.00 |
D080627.1 | SGP/SIRS/E21 - Ventilator Fan Failure | sgpsirsE21.00 |
D101103.3 | SGP/SIRS/E21 - Reprocess: TimeCheck Error | sgpsirsE21.00 |
D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpsirsE21.00, sgpsirsE21.01 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/08/2000 | 0510 | 02/10/2000 | 1700 |
Subject: | SGP/SIRS/E24 - SIRS Signal Cable Damage at E24 |
DataStreams: | sgpsirsE24.00, sgpsirsE24.01 |
Description: | Cattle from adjoining field had broken the electric fence wire around the equipment and chewed radiometer cables in half adn damaged the shading arm(s) on the SciTec tracker. The NIP and DD shortwave data collected during this time were recorded by the logger as 'over-range' or 'open-channel' (with corresponding data values stored as '-99999') or a numeric value not representative of the real irradiance conditions due to faulty connections. Data for this period are to be considered MISSING. |
Measurements: | sgpsirsE24.00:
sgpsirsE24.01:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/03/2002 | 0000 | 02/03/2002 | 2359 |
Subject: | SGP/SIRS/E24 - bad records in sneakernet data file |
DataStreams: | sgpsirsE24.01 |
Description: | The sneakernet raw data file sgpsirsE24.01.20020203.052800.raw.200202031156.sneak.v0 has two corrupt data records. If this file is used for a future reprocessing effort, these two records should be discarded. The remainder of the data from this file should be carefully examined for additional abnormalities. The two bad records are: 25,2002,34,554,323.27, ... and 126,2002,34,605,321.73, ... |
Measurements: | sgpsirsE24.01:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2003 | 1000 | 05/28/2003 | 1430 |
Subject: | SGP/SIRS/E21 - Shadowband Misalignment/Tracker Failure |
DataStreams: | sgpsirsE21.00 |
Description: | The solar tracker failed beginning around sunrise on 05/19/03 most likely during the previous nights reset. Failure time was approximate time of sunrise at 1000 on 05/19/03. The tracker was power cycled and RTS at 1415 GMT on 05/28/03. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/03/2003 | 1000 | 06/16/2003 | 1835 |
Subject: | SGP/SIRS/E21 - Shadowband Misalignment/Tracker Failure |
DataStreams: | sgpsirsE21.00 |
Description: | Suntracker appears to have failed beginning on 6/3/03, most likely during previous night reset. Start time listed is approximate time of sunrise. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/17/2003 | 1000 | 08/06/2003 | 1350 |
Subject: | SGP/SIRS/E21 - Shadowband Misalignment |
DataStreams: | sgpsirsE21.00 |
Description: | Solar tracker stopped functioning on 7/17. Tracker power cycled on 07/24 and returned to normal tracking but failed again 7/25. Power was cycled again 8/6 and tracker performance was sustained thereafter. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/18/2003 | 1600 | 10/29/2003 | 1630 |
Subject: | SGP/SIRS/E21 - Bird Poop Contamination |
DataStreams: | sgpsirsE21.00 |
Description: | Downwelling shortwave values were erratic during the day on 10/18 and in very poor agreement at times with downwelling shortwave values calculated from direct and diffuse measurements. Bi-weekly preventative maintenace records indicate bird poop was cleaned from the downwelling shortwave instrument on 10/29 at 16:30. Review of maintenance records and instrument data indicate no bird contamination since 10/29. Turkey vultures are the usual suspects in data quality problems at this facility. The RBD(rotating bird deterrent) had failed the week of 10/13 and is awaiting parts. However, beginning in late October the birds had left the site. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/19/2003 | 0000 | 02/26/2004 | 2359 |
Subject: | SGP/SIRS/E21 - False signal |
DataStreams: | sgpsirsE21.00 |
Description: | During clear-sky conditions, downwelling shortwave values spike downward approximately 50 to 200 W/m^2 around 22:15 UTC for about 15 minutes. This problem occurs at about the same time for the same duration each day during the indicated period of the year. This effect is due to a shadow from the Rotating Bird Deterrent (RBD) installed earlier in the year to prevent extensive bird droppings at the site. The RBD is installed at such a location that it will partially shade the downwelling shortwave PSP from 19 October to 23 February of the year. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2004 | 1300 | 03/03/2004 | 1300 |
Subject: | SGP/SIRS/E21 - Shadowband Misalignment |
DataStreams: | sgpsirsE21.00 |
Description: | The NIP reported values close to zero and downwelling shortwave global and diffuse were equivalent due to tracker failure. Maintenance replaced tracker 2/27, but couldn't replace instruments until 03/02 2000 GMT due to bird poop contamination. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/21/2004 | 1200 | 03/24/2004 | 0200 |
Subject: | SGP/SIRS/E21 - Instrument logger time problem, Unknown |
DataStreams: | sgpsirsE21.00 |
Description: | Values of diffuse hemispheric shortwave radiation differ from derived values by at most 70 Wm^(-2). The incident appears to be isolated to 3/21, 3/22, and 3/23. An estimation of solar noon using downwelling shortwave hemispheric irradiance from the PSP shows solar noon to oocur at around 1845GMT on 3/21. Calculated solar noon occurs at E21 at 1831GMT for 3/21/2004. There appears to be a time discrepancy in the datalogger for these dates. 04/01 is the next date with enough sun to determine solar noon and compare to calculated. The data from this date appears correct. Ronald Reed [rreed@ops.sgp.arm.gov] reports the logger did not receive any reportable time updates during the late March time period. We don't know what happened during these three dates but from 3/24 on data looks acceptable. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/28/2004 | 1500 | 06/09/2004 | 1342 |
Subject: | SGP/SIRS/E21 - Dirt on dome |
DataStreams: | sgpsirsE21.00 |
Description: | Measured downwelling shortwave values differed from calculated (direct + diffuse) by +/-100 W/m^2 in the afternoon. Pattern of differences is indicative of a dirty downwelling shortwave dome. Maintenance on 6/9 cleaned water spots on the dome. Other downwelling instruments may have also been dirty during this period. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/30/2004 | 0156 | 07/07/2004 | 1800 |
Subject: | SGP/SIRS/E22 - Failed NIP sensor cable |
DataStreams: | sgpsirsE22.00 |
Description: | The suntracker was driven past it optical limit switch and pulled the direct normal (NIP) instrument cable from its connector. |
Measurements: | sgpsirsE22.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/13/2005 | 1945 | 03/17/2005 | 1745 |
Subject: | SGP/SIRS/E24 - Erratic downwelling shortwave data |
DataStreams: | sgpsirsE24.00 |
Description: | Downwelling shortwave hemispheric readings are occasionally erratic, jumping to very high or very low values for short periods of time. SGP PM techs reseated all Downwelling Shortwave PSP instrument connections on 3/17/2005 approx 1945GMT. The problem did not reoccur after that time but the DS cable was replaced on 3/31/2005 approx 1815 GMT to ensure the problem did not reappear. |
Measurements: | sgpsirsE24.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2005 | 0000 | 04/14/2005 | 1610 |
Subject: | SGP/SIRS/E24 - Dirt on dome |
DataStreams: | sgpsirsE24.00 |
Description: | The Downwelling Shortwave Hemispheric (DSH) Irradiance data were erratic. The Pyranometer instrument dome at this site was likely dirty given the relatively large spread between the measured DSH and derived DSH readings during the middle part of the day (up to 50 W/m^2). Rain on 04/06 most likely contributed to this problem. Preventative maintenance on 4/14 effectively cleaned the pyranometer dome. Preventative maintenance reports indicate dry-water spots on dome when it was cleaned on 4/14. |
Measurements: | sgpsirsE24.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2005 | 0000 | 07/20/2005 | 2000 |
Subject: | SGP/SIRS/E22 - Intermittent upwelling longwave data loss |
DataStreams: | sgpsirsE22.00 |
Description: | Upwelling longwave hemispheric data drops out occasionally during the afternoon hours. Maintenance determined that the Upwelling LW Hemispheric irradiance instrument, the PIR, had a failed cable affecting only the thermopile measurement of this instrument. Cable was replaced 7/20/05 2000GMT. |
Measurements: | sgpsirsE22.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/18/2005 | 1415 | 11/23/2005 | 1706 |
Subject: | SGP/SIRS/E24 - Reprocessing Notice (RID 216) |
DataStreams: | sgpsirsE24.00 |
Description: | See below for details of reprocessing that was completed on 20160127. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Calibration coefficient for the downwelling diffuse measurement (8-48 B&W Eppley instrument) was incorrect after the instrument replacement 8/18/2005. Affected downwelling diffuse irradiance data can be corrected: Irr(corr) = Irr(uncorr) / 122.85 * 112.85 (or a overall multiplier of .9186) |
Measurements: | sgpsirsE24.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/16/2006 | 1705 | 04/13/2006 | 1715 |
Subject: | SGP/SIRS/E24 - Reprocessing Notice (RID 257) |
DataStreams: | sgpsirsE24.00 |
Description: | See below for details of reprocessing that was completed on 20160127. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- During the PIR coefficient change from 4/coeffs to 1/coeff, the downwelling diffuse hemispheric instrument (Eppley 8-48) coefficient was inadvertently changed to 122.85 and should have been 112.85 W/m2/mV. Perform the following calculation to correct the data, DD=downwelling diffuse instrument: DD(new)[W/m2]=( DD(old)[W/m2]/122.85[W/m2\mV] )* 112.85[W/m2/mV] |
Measurements: | sgpsirsE24.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2006 | 1200 | 05/31/2006 | 1700 |
Subject: | SGP/SIRS/E21 - Roosting birds in field of view |
DataStreams: | sgpsirsE21.00 |
Description: | The RBDD (Rotating Bird Deterrent Device) installed at E21 to prevent turkey vultures from roosting on the instrument boom failed resulting in noisy NIP (Short Direct Normal) and PSP (Short Global Hemispheric) data and a spike occurring around 2230 UTC everyday due to obstruction of the field of view. Problem is intermittant due to moving birds. Use data with discretion. Follow ARM (DQMS3) flag recommendations for QC flags 02 or 03 found in section 5.1.4 of the SIRS handbook: http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2006 | 1722 | 04/12/2007 | 1810 |
Subject: | SGP/SIRS/E22 - Reprocess: Incorrect calibration coefficients |
DataStreams: | sgpsirsE22.00 |
Description: | NIP (short_direct_normal) 29541E6 had an incorrect calibration coefficient in the logger program. 128.97 should have been 126.67 [W/m2/mV]. |
Measurements: | sgpsirsE22.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/10/2007 | 0000 | 12/25/2007 | 2359 |
Subject: |
|
DataStreams: | sgpsirsE22.00, sgpsirsE21.00, sgpsirsE24.00 |
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: | sgpsirsE22.00:
sgpsirsE24.00:
sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2007 | 0000 | 07/01/2008 | 1500 |
Subject: | SGP/SIRS/E21 - Ventilator Fan Failure |
DataStreams: | sgpsirsE21.00 |
Description: | Start time is uncertain due to length of time this problem existed. During the time frame specified the PSP (down_short_hemisp) and 8-48 (down_short_diffuse_hemisp) ventilator fans failed. PM replaced the fans 7/1/2008 1500. Ventilator failure does adversely affect thermopile radiometer measurements but the extent has not been quantified. The 8-48 is significantly less affected than the PSP. Mentor suggests using component sum method detailed in SIRS instrument handbook where down_short_hemisp = down_short_diffuse + short_direct_normal * cos (zenith angle) for each time record. |
Measurements: | sgpsirsE21.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/07/2010 | 0000 | 06/29/2010 | 2359 |
Subject: | SGP/SIRS/E21 - Reprocess: TimeCheck Error |
DataStreams: | sgpsirsE21.00 |
Description: | The EF data system lost communication with the GPS likely starting on or around June 7th, the max time set For E21 was -5.04 sec. Since then, it has been increasing steadily: Jun 8 Offset: -267.449039 Jun 9 Offset: -541.038624 Jun 10 Offset: -814.469141 Jun 11 Offset: -1076.862114 Jun 12 Offset: -1350.330223 Jun 13 Offset: -1623.639335 Jun 14 Offset: -1897.047754 Jun 15 Offset: -2170.552312 Jun 16 Offset: -2422.130746 Jun 17 Offset: -2684.607495 Jun 18 - Jun 22 (unknown) Jun 23 Offset: -4204.730579 If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect time. SIRS irradiance data will be correct but the corresponding time stamp cannot be accurately known or simply corrected for. |
Measurements: | sgpsirsE21.00:
|
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: | sgpsirsE21.00, sgpsirsE21.01 |
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: | sgpsirsE21.01:
sgpsirsE21.00:
|