DQR ID | Subject | Data Streams Affected |
---|---|---|
D031124.8 | SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP) | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
D040205.1 | SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers | sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1 |
D040320.2 | SGP/SIRS/E8 - Possible Contamination of DS PSP instrument | sgpsirs20sE8.a0, sgpsirsE8.00, sgpsirsE8.b1 |
D040405.2 | SGP/SIRS/E7 - PSP dome contamination | sgpsirs20sE7.a0, sgpsirsE7.b1 |
D040621.3 | SGP/SIRS/E7 - Reprocessed: Corrected downwelling longwave calibrations | sgpsirsE7.b1 |
D040712.2 | SGP/SIRS/E24 - NIP shaded near sunrise | sgpsirs20sE24.a0, sgpsirs60sE24.a1, sgpsirsE24.a2, sgpsirsE24.b1 |
D040712.3 | SGP/SIRS/E24 - NIP shaded near sunrise | sgpsirs20sE24.a0, sgpsirsE24.b1 |
D040831.2 | SGP/SIRS/E7 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE7.00, sgpsirsE7.b1 |
D040831.3 | SGP/SIRS/E8 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE8.00, sgpsirsE8.b1 |
D050131.28 | SGP/SIRS/E8 - Ice storm | sgpsirs20sE8.a0, sgpsirsE8.b1 |
D050218.1 | SGP/SIRS/E7 - Reprocessed: Corrected Downwelling Longwave calibrations | sgpsirsE7.b1 |
D050227.1 | SGP/SIRS/E24 - Erratic downwelling shortwave data | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
D050307.3 | SGP/SIRS/E7 - Downwelling Shortwave incorrect | sgpsirsE7.00, sgpsirsE7.b1 |
D050412.3 | SGP/SIRS/E24 - Dirt on dome | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
D050606.1 | SGP/SIRS/E7 - Downwelling longwave incorrect | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
D050801.1 | SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination | sgpsirsE8.b1, sgpsirs20sE8.a0, sgpsirsE8.00 |
D050810.3 | SGP/SIRS/E20 - Downwelling Shortwave PSP Damaged by Lightning | sgpsirs20sE20.a0, sgpsirsE20.00, sgpsirsE20.b1 |
D051117.1 | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
D060403.4 | SGP/SIRS/E20 - Instrument noise problem | sgpsirs20sE20.a0, sgpsirsE20.00, sgpsirsE20.b1 |
D060405.1 | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
D060523.1 | SGP/SIRS/E8 - Instrument cable problem | sgpsirs20sE8.a0, sgpsirsE8.b1 |
D060630.15 | SGP/SIRS/E7 - Reprocessed: Longwave Calibration error | sgpsirsE7.b1 |
D060630.16 | SGP/SIRS/E8 - Reprocessed: Longwave Calibration error | sgpsirsE8.b1 |
D060630.26 | SGP/SIRS/E20 - Reprocessed: Longwave Calibration error | sgpsirsE20.b1 |
D060630.29 | SGP/SIRS/E24 - Reprocessed: Longwave Calibration error | sgpsirsE24.b1 |
D061205.2 | SGP/SIRS/E24 - Spikes in data | sgpsirs20sE24.a0, sgpsirsE24.b1 |
D061208.1 | SGP/SIRS/E7 - Instrument noise | sgpsirs20sE7.a0, sgpsirsE7.b1 |
D070411.2 | SGP/SIRS/E7 - SIRS Power supply problems | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
D070514.1 | SGP/SIRS/E24 - Loose connections | sgpsirsE24.b1, sgpsirs20sE24.a0 |
D070814.1 | SGP/SIRS/E7 - Downwelling shortwave data dropouts | sgpsirs20sE7.a0, sgpsirsE7.b1 |
D070927.1 | SGP/SIRS/E20 - Failed tracker and improperly configured tracker | sgpsirs20sE20.a0, sgpsirsE20.b1 |
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 | sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE2.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE10.00, sgpsirsE10.b1, sgpsirsE11.00, sgpsirsE11.b1, sgpsirsE12.00, sgpsirsE12.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirsE15.00, sgpsirsE15.b1, sgpsirsE16.00, sgpsirsE16.b1, sgpsirsE18.00, sgpsirsE18.b1, sgpsirsE19.00, sgpsirsE19.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE4.00, sgpsirsE4.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE6.00, sgpsirsE6.b1, sgpsirsE7.00, sgpsirsE7.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirsE9.00, sgpsirsE9.b1 |
D080317.1 | SGP/SIRS/E7 - Downwelling Shortwave failure | sgpsirs20sE7.a0, sgpsirsE7.b1 |
D080515.1 | SGP/SIRS/E20 - Intermittent missing data | sgpsirsE20.b1, sgpsirs20sE20.a0 |
D080610.1 | SGP/SIRS/E20 - Missing data | sgpsirs20sE20.a0, sgpsirsE20.b1 |
D080625.2 | SGP/SIRS/E8 - Ventilator Fan Failure | sgpsirs20sE8.a0, sgpsirsE8.00, sgpsirsE8.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2003 | 0317 | 12/03/2003 | 0000 |
Subject: | SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP) |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
Description: | Beginning around 0317 UTC, 11/21, downwelling shortwave values became anamolously high during the night, when they should have been around zero. Values returned to normal after SGP technicians reseated this instruments connections at 1215UTC 12/02/2003. The following day's data appeared normal. Appears that a poor connection was the culprit this time. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
sgpsirsE7.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2004 | 1200 | 02/02/2004 | 2000 |
Subject: | SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers |
DataStreams: | sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1 |
Description: | A large discrepancy between the measured values of downwelling hemispheric shortwave radiation and the derived values occurred on 2/02 at the listed sites. The difference is on the order of 200 Wm^(-2) at E2 and to a lesser extent at the other affected stations. This problem most likely resulted from a previous day or night snow/ice accumulation on the Direct(NIP), Downwelling Sortwave(PSP) and/or Downwelling Diffuse(8-48) instruments. During the morning hours of 02/02, Approx 1300-2000GMT, snow/ice was covering one or more of these three instruments resulting in faulty readings and incorrect derived downwelling shortwave values as well. Instrument readings indicate the problem resolved itself later in the day through normal meltoff. |
Measurements: | sgpsirs20sE3.a0:
sgpsirsE3.00:
sgpsirs20sE5.a0:
sgpsirs20sE1.a0:
sgpsirsE1.b1:
sgpsirs20sE8.a0:
sgpsirsE2.b1:
sgpsirsE1.00:
sgpsirsE8.b1:
sgpsirs20sE2.a0:
sgpsirsE8.00:
sgpsirsE3.b1:
sgpsirsE5.b1:
sgpsirsE2.00:
sgpsirsE5.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/15/2004 | 1500 | 03/31/2004 | 1200 |
Subject: | SGP/SIRS/E8 - Possible Contamination of DS PSP instrument |
DataStreams: | sgpsirs20sE8.a0, sgpsirsE8.00, sgpsirsE8.b1 |
Description: | Downwelling hemispheric shortwave values drop at about 1500 GMT under clear sky conditions, typically from about 14:00GMT to 16:00GMT. This may be due to a dirty PSP but maintenance on 03/23/04 18:11 GMT revealed no more than typical light dust. The problem was essentially undetectable by 03/31/04 12:00. The time of day that the problem exists appears to be an exagerated PSP cosine response. No obvious reason presents why the problem appeared and then disappeared within this two week period. |
Measurements: | sgpsirsE8.b1:
sgpsirsE8.00:
sgpsirs20sE8.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/30/2004 | 1430 | 04/06/2004 | 2100 |
Subject: | SGP/SIRS/E7 - PSP dome contamination |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.b1 |
Description: | Values of hemispheric downwelling shortwave radiation differed from derived values by 45 W/m^2 on 03/30 around 1430 GMT under clear sky conditions due to dirt on the dome. Maintenance reported cleaning heavy dust from dome on 04/06 2030 GMT. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/20/2004 | 1825 | 06/29/2004 | 1915 |
Subject: | SGP/SIRS/E7 - Reprocessed: Corrected downwelling longwave calibrations |
DataStreams: | sgpsirsE7.b1 |
Description: | While attempting to correct calibration coefficients (see D040831.2) a new datalogger program was loaded which applied the wrong serial number and calibration coefficients to the downwelling longwave measurement. The data were reprocessed in September 2006 with the correct downwelling longwave calibrations and archived on 20061003. |
Measurements: | sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/08/2002 | 1200 | 05/20/2002 | 1300 |
07/26/2002 | 1300 | 09/06/2002 | 1200 |
04/08/2003 | 1200 | 04/16/2003 | 1300 |
Subject: | SGP/SIRS/E24 - NIP shaded near sunrise |
DataStreams: | sgpsirs20sE24.a0, sgpsirs60sE24.a1, sgpsirsE24.a2, sgpsirsE24.b1 |
Description: | The NIP is shaded by the EF laptop computer enclosure near sunrise during parts of the Spring and Summer. This has occurred from 04/08 to 05/20 and from 07/26 to 09/06 every year since 2001 and will occur during these date ranges in the future as well. The shading occurs for a few minutes each day between 1200 and 1300 GMT depending on the time of the year. For the early dates, shading occurs a little after 1200 GMT and by 05/20 shading happens nearer to 1300 GMT. In late July the shading occurs near 1300 GMT and closer to 1200 GMT by 09/06. |
Measurements: | sgpsirsE24.a2:
sgpsirs60sE24.a1:
sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/2003 | 1200 | 05/20/2003 | 1300 |
07/26/2003 | 1300 | 09/06/2003 | 1200 |
04/08/2004 | 1200 | 05/20/2004 | 1300 |
07/26/2004 | 1300 | 09/06/2004 | 1200 |
Subject: | SGP/SIRS/E24 - NIP shaded near sunrise |
DataStreams: | sgpsirs20sE24.a0, sgpsirsE24.b1 |
Description: | The NIP is shaded by the EF laptop computer enclosure near sunrise during parts of the Spring and Summer. This has occurred from 04/08 to 05/20 and from 07/26 to 09/06 every year since 2001 and will occur during these date ranges in the future as well. The shading occurs for a few minutes each day between 1200 and 1300 GMT depending on the time of the year. For the early dates, shading occurs a little after 1200 GMT and by 05/20 shading happens nearer to 1300 GMT. In late July the shading occurs near 1300 GMT and closer to 1200 GMT by 09/06. |
Measurements: | sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2004 | 1845 | 04/20/2004 | 1825 |
Subject: | SGP/SIRS/E7 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
DataStreams: | sgpsirsE7.00, sgpsirsE7.b1 |
Description: | During the pyrgeometer instrument (PIR) changout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements (instruments) were : downwelling diffuse (8-48), upwelling shortwave(PSP), direct normal (NIP) and downwelling shortwave (PSP) Recalculate irradiances by determining original mV signal and reapplying the correct calibration coefficients. For each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)*108.50 US(corrected) = (US/113.19)*110.10 NIP(corrected)= (NIP/120.17)*122.26 DS(corrected) = (DS/118.46)*122.56 |
Measurements: | sgpsirsE7.b1:
sgpsirsE7.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/10/2004 | 1825 | 04/20/2004 | 1825 |
Subject: | SGP/SIRS/E8 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
DataStreams: | sgpsirsE8.00, sgpsirsE8.b1 |
Description: | During the pyrgeometer instrument (PIR) changeout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements (instruments) were: downwelling diffuse (8-48), upwelling shortwave (PSP), direct normal (NIP) and downwelling shortwave (PSP) Recalculate irradiances by determining original mV signal and reapplying the correct calibration coefficients. For each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)*116.37 US(corrected) = (US/113.19)*121.78 NIP(corrected)= (NIP/120.17)*122.47 DS(corrected) = (DS/118.46)*122.34 |
Measurements: | sgpsirsE8.b1:
sgpsirsE8.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/04/2005 | 2102 | 01/11/2005 | 1943 |
Subject: | SGP/SIRS/E8 - Ice storm |
DataStreams: | sgpsirs20sE8.a0, sgpsirsE8.b1 |
Description: | Data missing due to ice storm. |
Measurements: | sgpsirsE8.b1:
sgpsirs20sE8.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/2004 | 2045 | 02/22/2005 | 2050 |
Subject: | SGP/SIRS/E7 - Reprocessed: Corrected Downwelling Longwave calibrations |
DataStreams: | sgpsirsE7.b1 |
Description: | Incorrect DIR calibration coeffs and serial numbers were applied to the data from 11/02/2004 when the shortwave instruments were changed out. Field techs corrected the program during longwave instrument replacement on 2/22/2005. The data were reprocessed in September 2006 to apply the correct calibrations. The reprocessed data were archived in October 2006. |
Measurements: | sgpsirsE7.b1:
|
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: | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
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:
sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2005 | 2200 | 04/05/2005 | 1950 |
Subject: | SGP/SIRS/E7 - Downwelling Shortwave incorrect |
DataStreams: | sgpsirsE7.00, sgpsirsE7.b1 |
Description: | Downwelling shortwave values dropped off to unrealistic values frequently at this site (usually between 1600 GMT and 0000 GMT). SGP techs found this was due to a bad multiplexer and it was replaced 04/05/2005 1950GMT along with the downwelling shortwave cable. |
Measurements: | sgpsirsE7.b1:
sgpsirsE7.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2005 | 0000 | 04/14/2005 | 1610 |
Subject: | SGP/SIRS/E24 - Dirt on dome |
DataStreams: | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
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:
sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2005 | 1950 | 04/19/2005 | 2100 |
Subject: | SGP/SIRS/E7 - Downwelling longwave incorrect |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
Description: | During maintenance to correct a problem with the downwelling shortwave data, the downwelling longwave instrument wiring was not properly fastened resulting in incorrect downwelling longwave hemispheric data. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
sgpsirsE7.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/27/2005 | 1930 | 08/09/2005 | 1940 |
Subject: | SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination |
DataStreams: | sgpsirsE8.b1, sgpsirs20sE8.a0, sgpsirsE8.00 |
Description: | The downelling shortwave hemispheric instrument (Eppley PSP) dome at this site had dirt or a smudge on it. This was most noticeable during mid to late afternoon hours (around 2100 GMT). PM cleaned the dome on 8/9/05 1940, correcting the problem. |
Measurements: | sgpsirsE8.b1:
sgpsirsE8.00:
sgpsirs20sE8.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/04/2005 | 2207 | 08/17/2005 | 1840 |
Subject: | SGP/SIRS/E20 - Downwelling Shortwave PSP Damaged by Lightning |
DataStreams: | sgpsirs20sE20.a0, sgpsirsE20.00, sgpsirsE20.b1 |
Description: | The PSP was damaged by a lightning strike on 8/04/05 (22:10 GMT). Data from other radiometers are good after this event. The PSP, NIP and shaded 8-48 were replaced 8/17/05 and the system returned to service at 18:40 GMT. Downwelling Shortwave (DS) data from the unshaded PSP during this period is reported as 0.0 W/sq m. The DS can be computed from available Direct Normal (NIP), Downwelling Diffuse (DD), and the computed Solar Zenith Angle (SZA) using the following equation: DS = NIP * Cos(SZA) + DD Estimated uncertainties of the computed values are actually lower than those of the measured DS (+/- 3% or 4% vs. +/- 5% to 10% respectively, depending on SZA). |
Measurements: | sgpsirsE20.00:
sgpsirsE20.b1:
sgpsirs20sE20.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/18/2005 | 1415 | 11/23/2005 | 1706 |
Subject: | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients |
DataStreams: | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
Description: | 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:
sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/20/2005 | 1930 | 04/12/2006 | 2040 |
Subject: | SGP/SIRS/E20 - Instrument noise problem |
DataStreams: | sgpsirs20sE20.a0, sgpsirsE20.00, sgpsirsE20.b1 |
Description: | Afer recovery from lightening strike the upwelling longwave SIRS Eppley PIR (UIR) has had noise on both dome and case thermistor measurements. On 4/12/2006 techs replaced defective j-panel at base of tower. |
Measurements: | sgpsirsE20.00:
sgpsirsE20.b1:
sgpsirs20sE20.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/16/2006 | 1705 | 04/13/2006 | 1715 |
Subject: | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients |
DataStreams: | sgpsirs20sE24.a0, sgpsirsE24.00, sgpsirsE24.b1 |
Description: | 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:
sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/22/2006 | 1300 | 05/30/2006 | 2020 |
Subject: | SGP/SIRS/E8 - Instrument cable problem |
DataStreams: | sgpsirs20sE8.a0, sgpsirsE8.b1 |
Description: | The short_direct_normal, down_short_diffuse_hemisp and up_short_hemisp data are missing or are spiking to negative numbers. On 20060530, technicians discovered cows had chewed on the instrument cables. |
Measurements: | sgpsirsE8.b1:
sgpsirs20sE8.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2004 | 2000 | 02/07/2006 | 2005 |
Subject: | SGP/SIRS/E7 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE7.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in February 2004. 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: | sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/10/2004 | 1845 | 02/21/2006 | 1840 |
Subject: | SGP/SIRS/E8 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE8.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in February 2004. 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 instanteous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in September 2006. |
Measurements: | sgpsirsE8.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/23/2003 | 2100 | 02/15/2006 | 2030 |
Subject: | SGP/SIRS/E20 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE20.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 November 2006. |
Measurements: | sgpsirsE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/24/2003 | 1640 | 02/16/2006 | 1705 |
Subject: | SGP/SIRS/E24 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE24.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2004. 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: | sgpsirsE24.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/29/2006 | 0600 | 12/05/2006 | 1830 |
Subject: | SGP/SIRS/E24 - Spikes in data |
DataStreams: | sgpsirs20sE24.a0, sgpsirsE24.b1 |
Description: | The down_short_hemisp, down_long_hemisp, and upwelling_longwave showed large spikes (an order of magnitude) in data. Problem corrected itself on 12/5 before the site visit on 12/7. It is not known why the problem did not return but instruments affected were on the multiplexer. Maintenance reports it was not replaced. |
Measurements: | sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2006 | 0600 | 12/12/2006 | 2105 |
Subject: | SGP/SIRS/E7 - Instrument noise |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.b1 |
Description: | Beginning around 10/31, the E7 UIR experienced an increasingly noisy signal. The thermopile signal was noisy, but case and dome thermistors are well behaved. Maintenance reseated the UIR cable connections on 12/12/2006 which effectively eliminated the UIR noise. The thermopile data from the upwelling pyrgeometer is noisy with resulting irradiance variations of up to 5 W/m2, but doesn't appear to have a bias. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/05/2007 | 1430 | 03/10/2007 | 1500 |
03/22/2007 | 1400 | 03/26/2007 | 1830 |
Subject: | SGP/SIRS/E7 - SIRS Power supply problems |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
Description: | Power supply problems to SIRS datalogger resulted in logger voltage dropping below minimum for operation. During these time ranges the datalogger was either not operating or operating intermittantly as battery voltage would go above and below logger voltage threshold of approx 9VDC. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
sgpsirsE7.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/08/2007 | 2203 | 05/24/2007 | 1730 |
Subject: | SGP/SIRS/E24 - Loose connections |
DataStreams: | sgpsirsE24.b1, sgpsirs20sE24.a0 |
Description: | The down_short_hemisp, down_long_hemisp_shaded & up_long_hemisp were reporting large negative values. A loose ground wire was reconnected and the MUX was replaced. |
Measurements: | sgpsirsE24.b1:
sgpsirs20sE24.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/12/2007 | 1906 | 09/04/2007 | 1940 |
Subject: | SGP/SIRS/E7 - Downwelling shortwave data dropouts |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.b1 |
Description: | The down_short_hemisp data was dropping out to negative numbers and had high negative offsets. PM techs reseated the cable connections and found the ventilator fan had failed. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/15/2007 | 0000 | 03/14/2007 | 1855 |
03/14/2007 | 1856 | 06/06/2007 | 1745 |
Subject: | SGP/SIRS/E20 - Failed tracker and improperly configured tracker |
DataStreams: | sgpsirs20sE20.a0, sgpsirsE20.b1 |
Description: | On 1/15/2007 the E20 tracker failed due to weather. On 3/14 it was replaced but configured incorrectly (presumably the wrong lat/long). This wasn't discovered and corrected until 6/6/2007 1745GMT. All shortwave instruments dependent on proper tracker were affected. This includes measurements: downwelling shortwave diffuse and direct normal. Additionally, the global shortwave instrument have also been shaded during the second time range due to improperly set tracker. |
Measurements: | sgpsirsE20.b1:
sgpsirs20sE20.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/10/2007 | 0000 | 12/25/2007 | 2359 |
Subject: |
|
DataStreams: | sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE2.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE10.00, sgpsirsE10.b1, sgpsirsE11.00, sgpsirsE11.b1, sgpsirsE12.00, sgpsirsE12.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirsE15.00, sgpsirsE15.b1, sgpsirsE16.00, sgpsirsE16.b1, sgpsirsE18.00, sgpsirsE18.b1, sgpsirsE19.00, sgpsirsE19.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE4.00, sgpsirsE4.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE6.00, sgpsirsE6.b1, sgpsirsE7.00, sgpsirsE7.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirsE9.00, sgpsirsE9.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: | sgpsirsE16.b1:
sgpsirs20sE4.a0:
sgpsirs20sE21.a0:
sgpsirs20sE27.a0:
sgpsirs20sE1.a0:
sgpsirsE2.b1:
sgpsirsE12.00:
sgpsirs20sE11.a0:
sgpsirsE4.00:
sgpsirsE22.b1:
sgpsirs20sE12.a0:
sgpsirsE11.b1:
sgpsirsE11.00:
sgpsirsE21.00:
sgpsirsE10.00:
sgpsirs20sE3.a0:
sgpsirsE3.00:
sgpsirsE6.00:
sgpsirsE15.00:
sgpsirsE13.00:
sgpsirsE9.b1:
sgpsirsE1.b1:
sgpsirs20sE10.a0:
sgpsirs20sE15.a0:
sgpsirsE27.b1:
sgpsirsE24.b1:
sgpsirsE21.b1:
sgpsirsE19.b1:
sgpsirsC1.b1:
sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirs20sE7.a0:
sgpsirs20sE5.a0:
sgpsirsE7.00:
sgpsirsE13.b1:
sgpsirs20sE22.a0:
sgpsirsE1.00:
sgpsirsE22.00:
sgpsirsE8.b1:
sgpsirsE24.00:
sgpsirsE10.b1:
sgpsirs20sE9.a0:
sgpsirs20sE19.a0:
sgpsirsE3.b1:
sgpsirsE2.00:
sgpsirs20sE6.a0:
sgpsirs20sE20.a0:
sgpsirs20sE24.a0:
sgpsirs20sE13.a0:
sgpsirsE20.00:
sgpsirsE19.00:
sgpsirsE6.b1:
sgpsirsE27.00:
sgpsirsE7.b1:
sgpsirsE18.b1:
sgpsirsE18.00:
sgpsirsE9.00:
sgpsirsE16.00:
sgpsirs20sE8.a0:
sgpsirsE12.b1:
sgpsirs20sE18.a0:
sgpsirs20sE2.a0:
sgpsirsE15.b1:
sgpsirsE8.00:
sgpsirsE20.b1:
sgpsirs20sE16.a0:
sgpsirsE5.b1:
sgpsirsE5.00:
sgpsirsE4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2008 | 1900 | 05/15/2008 | 1820 |
Subject: | SGP/SIRS/E7 - Downwelling Shortwave failure |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.b1 |
Description: | The downwelling shortwave (Global PSP) values were dropping out. Problem started 2/4 but became persistent 3/9 and continued until replacement of Mux on 5/15. PSP data (down_short_hemisp) is not recoverable but can be calculated using: global = direct*cos(zenith angle) + diffuse See the SIRS instrument handbook for details of this component sum method. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/04/2008 | 0000 | 05/04/2008 | 2359 |
Subject: | SGP/SIRS/E20 - Intermittent missing data |
DataStreams: | sgpsirsE20.b1, sgpsirs20sE20.a0 |
Description: | Data are intermittent during the time period specified. Missing data are not recoverable. Available data are satisfactory. |
Measurements: | sgpsirsE20.b1:
sgpsirs20sE20.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/24/2003 | 1302 | 01/28/2003 | 1949 |
01/30/2003 | 0226 | 02/05/2003 | 1951 |
07/11/2003 | 0002 | 07/15/2003 | 2001 |
05/18/2005 | 2132 | 05/26/2005 | 1827 |
05/27/2005 | 0000 | 05/31/2005 | 0646 |
12/10/2007 | 1803 | 12/13/2007 | 1850 |
04/17/2008 | 2246 | 04/23/2008 | 1440 |
05/04/2008 | 1823 | 05/17/2008 | 1447 |
Subject: | SGP/SIRS/E20 - Missing data |
DataStreams: | sgpsirs20sE20.a0, sgpsirsE20.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpsirsE20.b1:
sgpsirs20sE20.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/2008 | 0330 | 07/08/2008 | 1750 |
Subject: | SGP/SIRS/E8 - Ventilator Fan Failure |
DataStreams: | sgpsirs20sE8.a0, sgpsirsE8.00, sgpsirsE8.b1 |
Description: | At the start time specified the PSP (down_short_hemisp) ventilator fan failed. PM replaced the fan 7/8/2008 1750. Ventilator failure does adversely affect radiometer measurements but the extent has not been quantified. 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: | sgpsirsE8.b1:
sgpsirsE8.00:
sgpsirs20sE8.a0:
|