| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D050227.1 | SGP/SIRS/E24 - Erratic downwelling shortwave data | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| D050412.3 | SGP/SIRS/E24 - Dirt on dome | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| D050520.1 | SGP/SIRS/E22 - Intermittent upwelling longwave data loss | sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0 |
| D050810.3 | SGP/SIRS/E20 - Downwelling Shortwave PSP Damaged by Lightning | sgpsirsE20.00, sgpsirsE20.b1, sgpsirs20sE20.a0 |
| D051117.1 | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| D060403.4 | SGP/SIRS/E20 - Instrument noise problem | sgpsirsE20.00, sgpsirsE20.b1, sgpsirs20sE20.a0 |
| D060405.1 | SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| D060424.1 | SGP/SIRS/E21 - Roosting birds in field of view | sgpsirsE21.00, sgpsirsE21.b1, sgpsirs20sE21.a0 |
| D060630.26 | SGP/SIRS/E20 - Reprocessed: Longwave Calibration error | sgpsirsE20.b1 |
| D060630.27 | SGP/SIRS/E21 - Reprocessed: Longwave Calibration error | sgpsirsE21.b1 |
| D060630.28 | SGP/SIRS/E22 - Reprocessed: Longwave Calibration error | sgpsirsE22.b1 |
| D060630.29 | SGP/SIRS/E24 - Reprocessed: Longwave Calibration error | sgpsirsE24.b1 |
| D060630.30 | SGP/SIRS/E27 - Reprocessed: Longwave Calibration error | sgpsirsE27.b1 |
| D061205.2 | SGP/SIRS/E24 - Spikes in data | sgpsirsE24.b1, sgpsirs20sE24.a0 |
| D070320.1 | SGP/SIRS/E22 - Reprocess: Incorrect calibration coefficients | sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0 |
| 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, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| 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:
sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| 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, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| 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:
sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| 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, sgpsirsE22.b1, sgpsirs20sE22.a0 |
| 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: | sgpsirs20sE22.a0:
sgpsirsE22.b1:
sgpsirsE22.00:
|
| 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: | sgpsirsE20.00, sgpsirsE20.b1, sgpsirs20sE20.a0 |
| 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.b1:
sgpsirs20sE20.a0:
sgpsirsE20.00:
|
| 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: | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| 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:
sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/20/2005 | 1930 | 04/12/2006 | 2040 |
| Subject: | SGP/SIRS/E20 - Instrument noise problem |
| DataStreams: | sgpsirsE20.00, sgpsirsE20.b1, sgpsirs20sE20.a0 |
| 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.b1:
sgpsirs20sE20.a0:
sgpsirsE20.00:
|
| 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: | sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0 |
| 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:
sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| 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, sgpsirsE21.b1, sgpsirs20sE21.a0 |
| 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:
sgpsirs20sE21.a0:
sgpsirsE21.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 |
|---|---|---|---|
| 07/23/2003 | 1520 | 02/15/2006 | 1515 |
| Subject: | SGP/SIRS/E21 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE21.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: | sgpsirsE21.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/23/2003 | 1830 | 02/15/2006 | 1741 |
| Subject: | SGP/SIRS/E22 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE22.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 August 2006. |
| Measurements: | sgpsirsE22.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 |
|---|---|---|---|
| 05/16/2003 | 0002 | 02/15/2006 | 1750 |
| Subject: | SGP/SIRS/E27 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE27.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in May 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: | sgpsirsE27.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: | sgpsirsE24.b1, sgpsirs20sE24.a0 |
| 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: | sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| 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, sgpsirsE22.b1, sgpsirs20sE22.a0 |
| 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: | sgpsirs20sE22.a0:
sgpsirsE22.b1:
sgpsirsE22.00:
|