DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D030917.16 | SGP/SIRS/C1 - Missing data due to Ice storm and clock problems | sgpsirsC1.b1 | Missing |
D040322.1 | SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric | sgpsirsC1.b1 | Suspect |
D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirsC1.b1 | Incorrect |
D050106.4 | SGP/SIRS/C1 - Reprocessed: UIR/DIR Incorrect calibration coefficients | sgpsirsC1.b1 | Does not affect quality |
D050206.2 | SGP/SIRS/C1 - Monthly Summary | sgpsirsC1.b1 | Does not affect quality |
D050929.1 | SGP/SIRS/C1 - sun tracker power failure | sgpsirsC1.b1 | Incorrect |
D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 | Does not affect quality |
D061121.2 | SGP/SIRS/C1 - Upwelling SW cable problem | sgpsirsC1.b1 | Incorrect |
D070306.1 | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients | sgpsirsC1.b1 | Incorrect |
D070424.1 | SGP/SIRS/C1 - Upwelling LW cable problems | sgpsirsC1.b1 | Incorrect |
D071022.4 | SGP/SIRS/C1 - Sensor Cable Problem | sgpsirsC1.b1 | Incorrect |
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 | sgpsirsC1.b1 | Suspect |
D090623.1 | SGP/SIRS/C1 - SW direct normal data drop out | sgpsirsC1.b1 | Incorrect |
D090929.2 | SGP/SIRS/C1 - Reprocessed: Upwelling shortwave | sgpsirsC1.b1 | Does not affect quality |
D100701.1 | SGP/SIRS/C1 - Failed Upwelling SW cable | sgpsirsC1.b1 | Incorrect |
D110628.2 | SGP/SIRS/C1 - NIP failure | sgpsirsC1.b1 | Incorrect |
D111202.1 | SGP/SIRS/C1 - NIP Failure | sgpsirsC1.b1 | Incorrect |
D120302.2 | SGP/SIRS/C1 - Reprocessing Notice (RID 734) | sgpsirsC1.b1 | Does not affect quality |
D120404.1 | SGP/SIRS/C1 - Reprocessing Notice (RID 739) | sgpsirsC1.b1 | Does not affect quality |
D120420.3 | SGP/QCRAD/C1 - Reprocess: SW data require -1 multipler | sgpqcrad1longC1.s2 | Incorrect |
D120420.4 | SGP/QCRAD/C1 - Upwelling SW cable problem | sgpqcrad1longC1.s2 | Incorrect |
D120420.5 | SGP/QCRAD/C1 - Sensor cable problem | sgpqcradbeflux1longC1.s2, sgpqcrad1longC1.s2, sgpqcradbeflux1longC1.c2 | Incorrect |
D120420.6 | SGP/QCRAD/C1 - SW direct normal data drop out | sgpqcrad1longC1.s2 | Incorrect |
D120420.7 | SGP/QCRAD/C1 - Failed upwelling SW cable | sgpqcrad1longC1.s2 | Incorrect |
D120420.8 | SGP/QCRAD/C1 - NIP failure | sgpqcrad1longC1.s2 | Incorrect |
D120510.5 | SGP/QCRAD/C1 - Case and dome temperatures not available | sgpqcrad1longC1.s2 | Suspect |
D130208.1 | SGP/SIRS/C1 - Missing NIP data | sgpsirsC1.b1 | Missing |
D130709.1 | SGP/SIRS/C1 - NIP sensor failure | sgpsirsC1.b1 | Missing |
D130930.2 | SGP/SIRS/C1 - Solar tracker failure | sgpsirsC1.b1 | Incorrect |
D140327.1 | SGP/SIRS/C1 - Sensor alignment/level | sgpsirsC1.b1 | Does not affect quality |
D141006.7 | SGP/SIRS/C1 - Instrument problem | sgpsirsC1.b1 | Incorrect |
D150128.1 | SGP/SIRS/C1 - Instrument | sgpsirsC1.b1 | Incorrect |
D150302.1 | SGP/SIRS/C1 - Solar tracker no functioning | sgpsirsC1.b1 | Incorrect |
D150424.1 | SGP/SIRS/C1 - Instrument | sgpsirsC1.b1 | Incorrect |
D150904.1 | SGP/SIRS/C1 - Instrument | sgpsirsC1.b1 | Incorrect |
D160104.7 | SGP Site Power Outage Due to Winter Storm | sgpsirsC1.b1 | Does not affect quality |
D160212.7 | SGP/SIRS/C1 - Data System Upgrade: Data Missing | sgpsirsC1.b1 | Missing |
D160318.7 | SGP/SIRS/C1 - PSP off-level | sgpsirsC1.b1 | Does not affect quality |
D160325.3 | SGP/SIRS/C1 - Solar tracker not operating correctly | sgpsirsC1.b1 | Incorrect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/09/2002 | 2101 | 03/10/2002 | 2125 | Missing |
03/13/2002 | 1801 | 03/14/2002 | 1602 | Missing |
Subject: | SGP/SIRS/C1 - Missing data due to Ice storm and clock problems |
DataStreams: | sgpsirsC1.b1 |
Description: | Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/18/2004 | 1500 | 06/10/2004 | 2000 | Suspect |
Subject: | SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric |
DataStreams: | sgpsirsC1.b1 |
Description: | Measured values of downwelling hemispheric shortwave radiation were up to 40 W/m^2 higher than derived values during the afternoon hours. Analysis reveals that this is likely an artifact of the cosine response of the particular installed PSP coupled with typical uncertainties of this set of installed radiometers. That is, this particular instrument cluster seems to be producing cumulative errors on the high side of accepted values. The PSP contains the most uncertainty in measurement at this station. Users should use a derived value for the downwelling shortwave hemispheric irradiance (DS). Where DS = diffuse component + direct normal * cos(SZA) component described in the SIRS handbook Sec 7.2 available at: http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/27/2004 | 1830 | 09/07/2004 | 2130 | Incorrect |
Subject: | SGP/SIRS/C1/E13 - Incorrect calibration coefficients |
DataStreams: | sgpsirsC1.b1 |
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: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/27/2004 | 1429 | 01/07/2005 | 1623 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Reprocessed: UIR/DIR Incorrect calibration coefficients |
DataStreams: | sgpsirsC1.b1 |
Description: | The datalogger program at SIRS.C1 was automatically updated on 9/27/2004 1423GMT with an older program with incorrect UIR and DIR calibration coefficients. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/01/2004 | 0000 | 01/01/2005 | 0000 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Monthly Summary |
DataStreams: | sgpsirsC1.b1 |
Description: | dominant problem here is the daytime 3 component problem. Direct and Diffuse are always too high and Global is too low. The problem occurs around the time that the testing regime switches from twilight to daytime testing regimes or from daytime to twilight. The flags occur in significant numbers on the 1st - 5th, 8th - 20th, 24th - 28th, 30th, and 31st. The failures vary in magnitude and duration. The worst flags for a particular day is typically high level yellow, with respect to this problem. Global goes below daytime empirical limits on both the 5th and 6th for substantial periods of time. Diffuse also goes below daytime empirical limits on the 6th in the evening. Upwelling Longwave is below empirical limits on the 24th. This may not be a problem, as many sites exhibited the same problem on the same night. Exceptionally cold temperatures may be the cause. Direct also exceeds its daytime empirical limit on the 1st, 4th, 10th, 13th, 14th, and 20th. This occurs at the changeover from medium to high air mass and does not last for longer than 30 minutes. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/27/2005 | 1430 | 09/27/2005 | 1630 | Incorrect |
Subject: | SGP/SIRS/C1 - sun tracker power failure |
DataStreams: | sgpsirsC1.b1 |
Description: | C1 experienced a sun tracker power faulure. The tracker was reset by onsite personnel shortly after the power failed. Only shaded and direct instruments were affected - i.e. the downwelling diffuse measurement from the 8-48 B&W pyranometer and the direct normal measurement from the NIP pyrheliometer. The downwelling longwave PIR data was unaffected by this event. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/11/2003 | 1950 | 02/16/2006 | 1901 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsC1.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 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: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/13/2006 | 0900 | 01/23/2007 | 1930 | Incorrect |
Subject: | SGP/SIRS/C1 - Upwelling SW cable problem |
DataStreams: | sgpsirsC1.b1 |
Description: | Starting 11/13/2006, the C1 SIRS Upwelling Shortwave (up_short_hemisp) started to show large differences in comparison to co-located E13 SIRS and C1 IRT25m. After much troubleshooting and gnashing of teeth it was discovered that rodents had chewed through the instrument cables at the bottom of the tilt tower. Cables were replaced 01/23/2007 1930GMT. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/03/2006 | 1509 | 03/06/2007 | 1610 | Incorrect |
Subject: | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients |
DataStreams: | sgpsirsC1.b1 |
Description: | Incorrection calibration coefficients were used in the C1/SIRS datalogger program. The PSP-US (upwelling shortwave global hemispheric), 30943F3 should be 126.93 not 129.93 [W/m2/mV]. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/03/2007 | 2005 | 01/23/2007 | 1930 | Incorrect |
Subject: | SGP/SIRS/C1 - Upwelling LW cable problems |
DataStreams: | sgpsirsC1.b1 |
Description: | Troubleshooting of the upwelling shortwave instrument on Jan 3rd 2007 caused problems with the co-located upwelling longwave hemispheric irradiance Eppley PIR instrument (aka UIR). Data dropouts persisted from this date to the final resolution of both shortwave and longwave instrument problems. Rodents had chewed through the instrument cables. The cables were replaced 01/23/2007 1930GMT. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/03/2007 | 1400 | 04/22/2008 | 2052 | Incorrect |
Subject: | SGP/SIRS/C1 - Sensor Cable Problem |
DataStreams: | sgpsirsC1.b1 |
Description: | Beginning October 3, 2007, the upwelling longwave irradiance (up_long_hemisp, aka "UIR") started to spike to unreasonable values positively offset from the co-located E13 by over 100W/m2. On January 17 2008 the UIR values become consistently bad due to bad UIR dome thermistor wiring. Problem appears as a resistive offset in the dome thermistor but due to nature of failure (unknown cable problem) data correction would not yield any better data than the co-located E13 UIR instrument that is known to be operating correctly. Instrument cable replacement on 4/22 fixed the problem. Thermopile data (netIR) from this instrument is good. However, Incoming irradiance data is not correctable due to bad UIR dome thermistor wiring within the instrument cable. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/10/2007 | 0000 | 12/25/2007 | 2359 | Suspect |
Subject: |
|
DataStreams: | sgpsirsC1.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: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/18/2009 | 1751 | 07/31/2009 | 1645 | Incorrect |
Subject: | SGP/SIRS/C1 - SW direct normal data drop out |
DataStreams: | sgpsirsC1.b1 |
Description: | NIP cable had failed during this time period. Short_direct_normal data are not recoverable during this time period. However, it can be reconstructed using the following formula for each one minute data: short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/14/2009 | 0514 | 10/19/2009 | 2001 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Reprocessed: Upwelling shortwave |
DataStreams: | sgpsirsC1.b1 |
Description: | The upwelling shortwave hemispheric data were bad 20090914-20091009 due to a broken instrument cable. The cable was replaced on 10/09 at 1711 GMT but the leads were reversed. The leads were corrected 10/19 at 2001 GMT. The data for 20090914-20091019 have been reprocessed. The bad data from 20090914-20091009 were set to missing in the newly available reprocessed data set. The 20091009-20091019 data were corrected by applying a (-1) multiplier. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/20/2010 | 0414 | 06/30/2010 | 1442 | Incorrect |
Subject: | SGP/SIRS/C1 - Failed Upwelling SW cable |
DataStreams: | sgpsirsC1.b1 |
Description: | The upwelling shortwave hemispheric (up_short_hemisp) data were missing or incorrect due to a bad cable. Cable was replaced on 6/30 and the problem was resolved. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/12/2011 | 0000 | 06/24/2011 | 1740 | Incorrect |
Subject: | SGP/SIRS/C1 - NIP failure |
DataStreams: | sgpsirsC1.b1 |
Description: | The short_direct_normal (NIP instrument) cable failed during this time period. Data are not recoverable. Users can derive an estimate of direct normal values using the following formula: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
08/16/2011 | 2144 | 08/25/2011 | 1435 | Incorrect |
Subject: | SGP/SIRS/C1 - NIP Failure |
DataStreams: | sgpsirsC1.b1 |
Description: | The short_direct_normal (NIP instrument) cable failed (broken wire in NIP connector) during this time period. Data are not recoverable. An estimate of direct normal values can be derived using the following formula: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/14/2011 | 1730 | 01/04/2012 | 2045 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Reprocessing Notice (RID 734) |
DataStreams: | sgpsirsC1.b1 |
Description: | See below for details of reprocessing that was completed on 201410/24. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- Calibration coefficient for downwelling longwave was incorrect for the specified period. To correct the one minute data b1 datastream follow the procedure below: 1) Obtain the following variables from the 20s datastream for each one minute of the affected time range: inst_down_long_shaded_dome_resist (Rd) inst_down_long_shaded_case_resist (Rc) inst_down_long_hemisp_shaded_tp (tpDIR_mV) 2) using the 20s tp voltage in mV convert to uV. tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV] 3) For each 20s data entry convert Rd and Rc to temperature Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3))) Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3))) where a0 = 0.0010295 a1 = 0.0002391 a2 = 0.0000001568 4) Apply for each 20s data entry: (correct k1=0.2762) WinDIR(W/m2)= [0.2762*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4) where, Sigma = 5.6704E-8 (Stefan-Boltzman Const) 5) Generate new 1 minute average from the 3 20-second measurements |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/04/2012 | 0000 | 02/29/2012 | 1731 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Reprocessing Notice (RID 739) |
DataStreams: | sgpsirsC1.b1 |
Description: | See below for details of reprocessing that was completed on 20141024. Original DQR category: 4 (Red, Incorrect). ----------------------------------------------------------- The calibration coeff and serial number for the down_long_hemisp_shaded was incorrect during the period specified. Correct Instrument serial number = 30010F3 K1 = 0.3125 Incorrect Instrument serial number = 30690F3 K1 = 0.2762 Data will be reprocessed. To correct the one minute data b1 datastream follow the procedure below: 1) Obtain the following variables from the 20s datastream for each one minute of the affected time range: inst_down_long_shaded_dome_resist (Rd) inst_down_long_shaded_case_resist (Rc) inst_down_long_hemisp_shaded_tp (tpDIR_mV) 2) using the 20s tp voltage in mV convert to uV. tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV] 3) For each 20s data entry convert Rd and Rc to temperature Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3))) Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3))) where a0 = 0.0010295 a1 = 0.0002391 a2 = 0.0000001568 4) Apply for each 20s data entry: (correct k1=0.3125) WinDIR(W/m^2)= [0.3125*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4) where, WinDIR = Corrected down_long_hemisp_shaded (W/m^2) Sigma = 5.6704E-8 (Stefan-Boltzman Constant) 5) Generate new 1 minute average from the three 20-second measurements |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/24/2000 | 1900 | 05/08/2000 | 2359 | Incorrect |
Subject: | SGP/QCRAD/C1 - Reprocess: SW data require -1 multipler |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | Magnitude of data are correct, however, 2 wires were crossed producing negative values for SW Global Down, SW Global Up, SW Direct Normal, and SW Diffuse Down. Problem has been fixed at site. Users of this data should multiply by -1 to get the correct values for SW Global Down, SW Global Up, SW Direct Normal, and SW Diffuse Down. Data will be reprocessed. Documented in instrument DQR D000919.1. |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/13/2006 | 0900 | 01/23/2007 | 1930 | Incorrect |
Subject: | SGP/QCRAD/C1 - Upwelling SW cable problem |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | Starting 11/13/2006, the C1 SIRS Upwelling Shortwave (up_short_hemisp) started to show large differences in comparison to co-located E13 SIRS and C1 IRT25m. After much troubleshooting and gnashing of teeth it was discovered that rodents had chewed through the instrument cables at the bottom of the tilt tower. Cables were replaced 01/23/2007 1930GMT. Documented in instrument DQR D061121.2 |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/03/2007 | 1400 | 04/22/2008 | 2052 | Incorrect |
Subject: | SGP/QCRAD/C1 - Sensor cable problem |
DataStreams: | sgpqcradbeflux1longC1.s2, sgpqcrad1longC1.s2, sgpqcradbeflux1longC1.c2 |
Description: | Beginning October 3, 2007, the upwelling longwave irradiance (up_long_hemisp, aka "UIR") started to spike to unreasonable values positively offset from the co-located E13 by over 100W/m2. On January 17 2008 the UIR values become consistently bad due to bad UIR dome thermistor wiring. Problem appears as a resistive offset in the dome thermistor but due to nature of failure (unknown cable problem) data correction would not yield any better data than the co-located E13 UIR instrument that is known to be operating correctly. Instrument cable replacement on 4/22 fixed the problem. Thermopile data (netIR) from this instrument is good. However, incoming irradiance data is not correctable due to bad UIR dome thermistor wiring within the instrument cable. Documented in instrument DQR D071022.4. |
Measurements: | sgpqcradbeflux1longC1.c2:
sgpqcradbeflux1longC1.s2:
sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/18/2009 | 1751 | 07/31/2009 | 1645 | Incorrect |
Subject: | SGP/QCRAD/C1 - SW direct normal data drop out |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | NIP cable had failed during this time period. Short_direct_normal data are not recoverable during this time period. However, it can be reconstructed using the following formula for each one minute data: short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(zenith angle) Documented in instrument DQR D090623.1 |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/20/2010 | 0414 | 06/30/2010 | 1442 | Incorrect |
Subject: | SGP/QCRAD/C1 - Failed upwelling SW cable |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | The upwelling shortwave hemispheric (up_short_hemisp) data were missing or incorrect due to a bad cable. Cable was replaced on 6/30 and the problem was resolved. Documented in instrument DQR D100701.1 |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/12/2011 | 0000 | 06/24/2011 | 1740 | Incorrect |
Subject: | SGP/QCRAD/C1 - NIP failure |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | The short_direct_normal (NIP instrument) cable failed during this time period. Data are not recoverable. Users can derive an estimate of direct normal values using the following formula: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) Documented in instrument DQR D110628.2 |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/01/1999 | 0000 | 12/31/2000 | 2359 | Suspect |
Subject: | SGP/QCRAD/C1 - Case and dome temperatures not available |
DataStreams: | sgpqcrad1longC1.s2 |
Description: | Longwave downwelling and upwelling case and dome temperatures are not available during this time period because they were not kept in the sirs.a1 files and sirs.b1 files are not available. This means that some longwave tests and corrections can't be applied. |
Measurements: | sgpqcrad1longC1.s2:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/27/2013 | 1500 | 02/06/2013 | 1721 | Missing |
Subject: | SGP/SIRS/C1 - Missing NIP data |
DataStreams: | sgpsirsC1.b1 |
Description: | The short_direct_normal (direct beam, NIP instrument) values are missing during this time range due a broken signal wire. Problem was corrected on 2/6/2013 The short_direct_normal data are not recoverable. However, it can be derived using the following relationship and applied to the good one minute data from the global and diffuse instruments (the SIRS instrument handbook describes this in detail): short_direct_normal(derived) = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/28/2013 | 0125 | 07/05/2013 | 1540 | Missing |
Subject: | SGP/SIRS/C1 - NIP sensor failure |
DataStreams: | sgpsirsC1.b1 |
Description: | The short_direct_normal data are missing due to an instrument failure (NIP pyhrheliometer) likely due to a nearby lightning strike near the time of initial failure. The short_direct_normal data are not recoverable during this time period. However, direct normal data can be reconstructed from the down_short_diffuse_hemisp and down_short_hemisp using the following relationship for each data point: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/28/2013 | 1200 | 09/30/2013 | 1500 | Incorrect |
09/26/2013 | 1200 | 09/26/2013 | 1600 | Incorrect |
Subject: | SGP/SIRS/C1 - Solar tracker failure |
DataStreams: | sgpsirsC1.b1 |
Description: | Solar tracker was not operating correctly during the specified time periods. Data from the direct normal instrument (short_direct_normal), and diffuse shaded global instrument (down_short_diffuse) were adversely affected. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/24/2013 | 0000 | 03/24/2014 | 1545 | Does not affect quality |
Subject: | SGP/SIRS/C1 - Sensor alignment/level |
DataStreams: | sgpsirsC1.b1 |
Description: | During the time range specified the downwelling shortwave DS radiometer (down_short_hemisp measurement) was slightly out of level. The affects on data quality are within the uncertainly of the instrument. However, the derived DS value (component sum of direct and diffuse shortwave) should be used during this time period. Any of the associated VAPs (QCRAD, Central Facility Best Estimate) use the component sum by default and will not be adversely affected. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/01/2014 | 1220 | 10/01/2014 | 1600 | Incorrect |
09/27/2014 | 1220 | 09/29/2014 | 1500 | Incorrect |
09/26/2014 | 1220 | 09/26/2014 | 1329 | Incorrect |
Subject: | SGP/SIRS/C1 - Instrument problem |
DataStreams: | sgpsirsC1.b1 |
Description: | The solar tracker was not functioning during the affected time ranges, resulting in incorrect data. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/04/2015 | 1559 | 01/27/2015 | 2020 | Incorrect |
Subject: | SGP/SIRS/C1 - Instrument |
DataStreams: | sgpsirsC1.b1 |
Description: | Short_direct_normal instrument not operating correctly during the affected time period. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/21/2015 | 1300 | 02/24/2015 | 1911 | Incorrect |
Subject: | SGP/SIRS/C1 - Solar tracker no functioning |
DataStreams: | sgpsirsC1.b1 |
Description: | The solar tracker was not functioning during the affected time range, resulting in incorrect data. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/19/2015 | 1300 | 04/20/2015 | 1540 | Incorrect |
Subject: | SGP/SIRS/C1 - Instrument |
DataStreams: | sgpsirsC1.b1 |
Description: | The solar tracker was not functioning during the affected time range, resulting in incorrect data. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/28/2015 | 2230 | 06/29/2015 | 0200 | Incorrect |
Subject: | SGP/SIRS/C1 - Instrument |
DataStreams: | sgpsirsC1.b1 |
Description: | Short_direct_normal and down_short_diffuse_hemispheric are incorrect during the affected time period |
Measurements: | sgpsirsC1.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: | sgpsirsC1.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: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/26/2016 | 1800 | 01/28/2016 | 2021 | Missing |
Subject: | SGP/SIRS/C1 - Data System Upgrade: Data Missing |
DataStreams: | sgpsirsC1.b1 |
Description: | The site data system was upgraded. Data were not collected during this period. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
02/15/2016 | 0000 | 02/23/2016 | 1917 | Does not affect quality |
Subject: | SGP/SIRS/C1 - PSP off-level |
DataStreams: | sgpsirsC1.b1 |
Description: | PSP was slightly off-level, but not enough to affect data quality. PSP level was adjusted 02/23/16, 1917 GMT. |
Measurements: | sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/12/2016 | 0000 | 03/14/2016 | 1509 | Incorrect |
03/16/2016 | 0000 | 03/18/2016 | 2359 | Incorrect |
Subject: | SGP/SIRS/C1 - Solar tracker not operating correctly |
DataStreams: | sgpsirsC1.b1 |
Description: | Solar tracker not operating correctly during affected time periods. |
Measurements: | sgpsirsC1.b1:
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