DQR ID | Subject | Data Streams Affected |
---|---|---|
D030917.17 | SGP/SIRS/E13 - Missing data due to Ice storm and clock problems | sgpsirsE13.00, sgpsirsE13.a2, sgpsirsE13.b1, sgpsirs20sE13.a0, sgpsirs60sE13.a1, sgp1swfanalsirs1longE13.c1, sgp15swfanalsirs1longE13.c1 |
D040227.4 | SGP/SIRS/E15 - PSP dome contamination | sgpsirsE15.b1, sgpsirs20sE15.a0 |
D040608.3 | SGP/SIRS/E15 - NIP cable failure results in missing data | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0 |
D050114.5 | SGP/SIRS/E15 - Failed NIP cable | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
D050131.23 | SGP/SIRS/E15 - Ice storm | sgpsirsE15.b1, sgpsirs20sE15.a0 |
D050206.3 | SGP/SIRS/E13 - Monthly Report | sgpsirsE13.b1 |
D050601.1 | SGP/SIRS/E13 - Reprocess: incorrect calibrations | sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sE13.a0 |
D060630.21 | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error | sgpsirsE13.b1 |
D060630.22 | SGP/SIRS/E15 - Reprocessed: Longwave Calibration error | sgpsirsE15.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2002 | 2006 | 03/10/2002 | 1902 |
03/13/2002 | 1806 | 03/14/2002 | 1607 |
Subject: | SGP/SIRS/E13 - Missing data due to Ice storm and clock problems |
DataStreams: | sgpsirsE13.00, sgpsirsE13.a2, sgpsirsE13.b1, sgpsirs20sE13.a0, sgpsirs60sE13.a1, sgp1swfanalsirs1longE13.c1, sgp15swfanalsirs1longE13.c1 |
Description: | Data are missing due to power failures caused by an ice storm and resulting system/instrument clock problems. |
Measurements: | sgpsirsE13.b1:
sgpsirs60sE13.a1:
sgpsirsE13.a2:
sgpsirs20sE13.a0:
sgp15swfanalsirs1longE13.c1:
sgp1swfanalsirs1longE13.c1:
sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2004 | 1900 | 02/29/2004 | 1700 |
Subject: | SGP/SIRS/E15 - PSP dome contamination |
DataStreams: | sgpsirsE15.b1, sgpsirs20sE15.a0 |
Description: | PSP dome was dirty. Afternoon values of downwelling shortwave radiation were less than derived values by about 50 W/m^2. PSP values compare well to derived PSP values after precip event on 02/29/04 1300-1600 GMT. Maintenance on 03/02 1713 GMT revealed no unusual contamination. Precip on 02/29 likely effectively cleaned the PSP dome. |
Measurements: | sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
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, sgpsirsE15.b1, sgpsirs20sE15.a0 |
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:
sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
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: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0 |
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.b1:
sgpsirsC1.b1:
sgpsirsC1.00:
sgpsirs20sE13.a0:
sgpsirs20sC1.a0:
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, sgpsirsE15.b1, sgpsirs20sE15.a0 |
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:
sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0202 | 01/09/2005 | 0848 |
Subject: | SGP/SIRS/E15 - Ice storm |
DataStreams: | sgpsirsE15.b1, sgpsirs20sE15.a0 |
Description: | Data missing due to an ice storm. |
Measurements: | sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2004 | 0000 | 01/01/2005 | 0000 |
Subject: | SGP/SIRS/E13 - Monthly Report |
DataStreams: | sgpsirsE13.b1 |
Description: | :Data quality this site-month is good. The offset for the Global PSP is about -7 W/m^2. The 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, 7th - 20th, 24th - 28th, 30th, and 31st. The failures vary in magnitude and duration. The worst flags for a particular 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 afternoon. 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. |
Measurements: | sgpsirsE13.b1:
|
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, sgpsirsE13.b1, sgpsirs20sE13.a0 |
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.b1:
sgpsirs20sE13.a0:
sgpsirsE13.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2003 | 1935 | 02/16/2006 | 1905 |
Subject: | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE13.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: | sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/22/2003 | 1650 | 02/14/2006 | 1806 |
Subject: | SGP/SIRS/E15 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE15.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: | sgpsirsE15.b1:
|