| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D030916.6 | SGP/BRS/C1 - low downwelling shortwave readings | sgpbrsC1.00, sgpbrsC1.a2, sgpbrs20sC1.a0, sgpbrs60sC1.a1 |
| D040322.1 | SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D040608.2 | SGP/BRS/C1 - NIP sensor failure | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0 |
| D050106.4 | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1 |
| D050109.2 | SGP/NIMFR/C1 - Head connector failure | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1, sgpnimfrlangleyE13.c1, sgpnimfrlangplotE13.c1, sgpnimfrod1barnmichE13.c1 |
| D050206.1 | SGP/BRS/C1 - Monthly Summary | sgpbrsC1.b1 |
| D050206.2 | SGP/SIRS/C1 - Monthly Summary | sgpsirsC1.b1 |
| D050225.2 | SGP/BRS/C1 - Reprocess: Incorrect Calibration Coefficients | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| D050312.1 | SGP/BRS/C1 - Monthly Summary | sgpbrsC1.b1 |
| D050322.1 | SGP/BRS/C1 - low downwelling shortwave readings | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| D050810.2 | SGP/NIMFR/C1 - Instrument failure | sgpnimfrC1.b1, sgpnimfrE13.00, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| D050929.1 | SGP/SIRS/C1 - sun tracker power failure | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D060419.2 | SGP/NIMFR/C1 - Filter detector #5 (870nm) failure | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| D060630.2 | SGP/NIMFR/C1 - Missing data | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| D060630.3 | SGP/NIMFR/C1 - Reprocessed: Miscalibrated detectors #5 and #6 | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| D060630.7 | SGP/BRS/C1 - Reprocessed: Longwave Calibration error | sgpbrsC1.b1 |
| D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 |
| D061102.1 | SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement | sgpbrsC1.b1, sgpbrs20sC1.a0 |
| D061121.2 | SGP/SIRS/C1 - Upwelling SW cable problem | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D070301.1 | SGP/NIMFR/C1 - Tube heater not functioning | sgpnimfrC1.a0, sgpnimfrC1.b1 |
| D070306.1 | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D070424.1 | SGP/SIRS/C1 - Upwelling LW cable problems | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D071022.4 | SGP/SIRS/C1 - Sensor Cable Problem | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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 | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.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, 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, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0 |
| D080222.2 | SGP/RSS/C1 - Stability and nonlinearity corrections | sgprssC1.00, sgprssC1.b1 |
| D080922.6 | SGP/NIMFR/C1 - Missing data | sgpnimfrC1.b1 |
| D081020.1 | SGP/NIMFR/C1 - Intermittent noise, 500nm | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| D090623.1 | SGP/SIRS/C1 - SW direct normal data drop out | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D090929.2 | SGP/SIRS/C1 - Reprocessed: Upwelling shortwave | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| D091010.1 | SGP/NIMFR/C1 - Noise in 500nm channel | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| D091216.5 | SGP/NIMFR/C1 - Tube heater | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| D100701.1 | SGP/SIRS/C1 - Failed Upwelling SW cable | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/05/2001 | 0000 | 04/17/2003 | 2359 |
| Subject: | SGP/BRS/C1 - low downwelling shortwave readings |
| DataStreams: | sgpbrsC1.00, sgpbrsC1.a2, sgpbrs20sC1.a0, sgpbrs60sC1.a1 |
| Description: | Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in clear-sky conditions. Corrective maintenance on 12/1/2004 corrected this offset. It is not clear which CM action corrected the problem since the DS instrument cable was grounded to a new location and the DS ventilator fan was found in poor condition and was replaced. Either of these issues could have led to the problem observed in this instrument. |
| Measurements: | sgpbrs60sC1.a1:
sgpbrs20sC1.a0:
sgpbrsC1.00:
sgpbrsC1.a2:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/18/2004 | 1500 | 06/10/2004 | 2000 |
| Subject: | SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric |
| DataStreams: | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/02/2004 | 1734 | 06/15/2004 | 2010 |
| Subject: | SGP/BRS/C1 - NIP sensor failure |
| DataStreams: | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| Description: | Normal incidence values of downwelling shortwave radiation were
reported as -9999 (missing). The NIP instrument was damaged by
lightning in the area near the time of failure. |
| Measurements: | sgpbrsC1.b1:
sgpbrs20sC1.a0:
sgpbrsC1.00:
|
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirs20sE13.a0:
sgpsirsE13.00:
sgpsirsE13.b1:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/2004 | 1429 | 01/07/2005 | 1623 |
| Subject: | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1 |
| Description: | It appears the datalogger program at SIRS/C1 was automatically updated, unbeknownst to anyone, on 9/27/20041423GMT with an older program with incorrect UIR and DIR calibration coefficients. The correct and incorrect cal coeffs for the UIR and DIR pyrgeometers during this DQR period were: incorrectUIR correctUIR K0 -12.84 -13.00 K1 .2250 0.2573 K2 1.024 1.024 K3 -1.9280 -1.8050 incorrectDIR correctDIR K0 -13.15 -26.89 K1 0.2374 0.2967 K2 1.0260 1.0560 K3 -2.478 -3.3080 |
| Measurements: | sgpsirsC1.00:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/05/2005 | 2100 | 01/21/2005 | 0445 |
| Subject: | SGP/NIMFR/C1 - Head connector failure |
| DataStreams: | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1, sgpnimfrlangleyE13.c1, sgpnimfrlangplotE13.c1, sgpnimfrod1barnmichE13.c1 |
| Description: | The direct beam, head and tube temperatures went to zero beginning 20050105. The head connector was reseated 20050118 correcting the problem but the head signal cable was stressed again 20050120 through 20050121 resulting in poor data. Data between 20050118-20050120 may be ok but should be examined carefully. |
| Measurements: | sgpnimfrE13.b1:
sgpnimfrE13.a0:
sgpnimfrlangplotE13.c1:
sgpnimfrod1barnmichE13.c1:
sgpnimfrlangleyE13.c1:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/2004 | 0000 | 12/31/2004 | 0000 |
| Subject: | SGP/BRS/C1 - Monthly Summary |
| DataStreams: | sgpbrsC1.b1 |
| Description: | Data quality this site-month is poor. This is due largely to the missing Upwelling Shortwave and Upwelling Longwave the entire month. This problem has been ongoing for several months now. DQPR # 124 asserted that the Global PSP was recording inaccurate readings. Thus, the Global PSP was changed out on the 17th by site ops. Prior to the 17th, the Global PSP was falling below nighttime empirical limits on most nights and there were severe 3 component failures during the day. The change out of the PSP mitigated the severity of the 3 component failures and eliminated the nighttime empirical limits failures. There were still substantial 3 component flags after the 17th. |
| Measurements: | sgpbrsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/2004 | 0000 | 01/01/2005 | 0000 |
| 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 |
|---|---|---|---|
| 08/05/2004 | 1500 | 12/03/2004 | 1700 |
| Subject: | SGP/BRS/C1 - Reprocess: Incorrect Calibration Coefficients |
| DataStreams: | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| Description: | Lightening strike on or near 6/2/2004 took the BRS NIP(31747E6) out of service, on or near 6/15 the NIP was replaced and the datalogger program was changed to reflect the new NIP(31343E6). On 8/5/2004 the DIR (Downwelling longwave) instrument was changed out and a new program was loaded to reflect a new DIR. The new program contained the original installed shortwave instrument calibration coefficients including NIP 31747E6. Thus from 8/5 to when the shortwave instruments were changed out on 12/3 the wrong s/n and calibration factor (i.e. 31747E6) was applied to the actual NIP(31343E6)installed at BRS C1. |
| Measurements: | sgpbrsC1.b1:
sgpbrs20sC1.a0:
sgpbrsC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/2005 | 0000 | 02/01/2005 | 0000 |
| Subject: | SGP/BRS/C1 - Monthly Summary |
| DataStreams: | sgpbrsC1.b1 |
| Description: | Data quality this site-month is good. The offset in the Global PSP has been much improved, with an average nighttime offset of -4 W/m^2, since measures were taken on 17 DEC 2004 to fix it. The Global PSP does not go below nighttime empirical limits all month. Global does fall below daytime empirical limits for significant time periods on the 2, 4, 5, 12, 28, 30. There were still substantial 3 component flags 17 DEC 2004. The charcteristic three component failures are present through out the month, especially closer to the end of the month. The problem is about equally as bad in the morning as the evening. The flags are usually high level yellow at their worst for any given day. Finally, there are the typical three component flags on the 29th as well, but these occur under cloudy skies. The data return to normal the next day and a cause for the problem cannot be determined. |
| Measurements: | sgpbrsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/18/2003 | 0000 | 12/17/2004 | 2030 |
| Subject: | SGP/BRS/C1 - low downwelling shortwave readings |
| DataStreams: | sgpbrsC1.00, sgpbrsC1.b1, sgpbrs20sC1.a0 |
| Description: | Downwelling shortwave (DS) values frequently drop below -10 W/m^2 at night, and are consistently 20-40 W/m^2 less than the calculated downwelling shortwave during the day in clear-sky conditions. Corrective maintenance on 12/17/2004 corrected this offset. It is not clear which CM action corrected the problem since the DS instrument cable was grounded to a new location and the DS ventilator fan was found in poor condition and was replaced. Either of these issues could have led to the problem observed in this instrument. |
| Measurements: | sgpbrsC1.b1:
sgpbrs20sC1.a0:
sgpbrsC1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/02/2005 | 1800 | 09/23/2005 | 1900 |
| Subject: | SGP/NIMFR/C1 - Instrument failure |
| DataStreams: | sgpnimfrC1.b1, sgpnimfrE13.00, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| Description: | Head temp values frequently dropped to 0, -50, or -100 degrees Celsius. Often this causes the filters to drop to values of zero (or act erratic) as well. On 9/23 the instrument was pulled from service and the mentor found significant damage to the instrument due to overheating. Instrument will be rebuilt. |
| Measurements: | sgpnimfrE13.b1:
sgpnimfrE13.a0:
sgpnimfrE13.00:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/2005 | 1430 | 09/27/2005 | 1630 |
| Subject: | SGP/SIRS/C1 - sun tracker power failure |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/02/2006 | 2300 | 04/24/2006 | 2008 |
| Subject: | SGP/NIMFR/C1 - Filter detector #5 (870nm) failure |
| DataStreams: | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| Description: | Filter detector number 5 (870nm) failed and reported zero volts. |
| Measurements: | sgpnimfrE13.b1:
sgpnimfrE13.a0:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/24/2006 | 2009 | 05/11/2006 | 2007 |
| Subject: | SGP/NIMFR/C1 - Missing data |
| DataStreams: | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| Description: | Data are missing and unrecoverable. Instrument removed for repair. |
| Measurements: | sgpnimfrE13.b1:
sgpnimfrE13.a0:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/11/2006 | 2008 | 09/25/2006 | 2359 |
| Subject: | SGP/NIMFR/C1 - Reprocessed: Miscalibrated detectors #5 and #6 |
| DataStreams: | sgpnimfrC1.b1, sgpnimfrE13.a0, sgpnimfrE13.b1 |
| Description: | Filter detectors 5 and 6 were miscalibrated following repair and reinstallation in May 2006. The data for 20060511-20060928 were reprocessed and archived 20061116. |
| Measurements: | sgpnimfrE13.b1:
sgpnimfrE13.a0:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/11/2003 | 1935 | 02/16/2006 | 1903 |
| Subject: | SGP/BRS/C1 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpbrsC1.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in June 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 November 2006. |
| Measurements: | sgpbrsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/11/2003 | 1950 | 02/16/2006 | 1901 |
| 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 |
|---|---|---|---|
| 12/11/2003 | 1920 | 06/14/2004 | 2359 |
| Subject: | SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement |
| DataStreams: | sgpbrsC1.b1, sgpbrs20sC1.a0 |
| Description: | On 20031211 the Downwelling LW pyrgeometer was replaced but the calibrations were not updated. Calibrations have been corrected in data beginning 20040615. |
| Measurements: | sgpbrsC1.b1:
sgpbrs20sC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/13/2006 | 0900 | 01/23/2007 | 1930 |
| Subject: | SGP/SIRS/C1 - Upwelling SW cable problem |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/12/2006 | 1100 | 01/08/2008 | 2100 |
| Subject: | SGP/NIMFR/C1 - Tube heater not functioning |
| DataStreams: | sgpnimfrC1.a0, sgpnimfrC1.b1 |
| Description: | The tube heater is not functioning properly. On 6/27/06, site operations personnel indicated the heater plug was found to be disconnected (The heater became disconnected on 6/12/06). It was reconnected and while the head temperature returned to normal, the tube temperatures are still bad. The purpose of the tube heater is to help prevent condensation from forming on the window. The mentor has not noticed any problems with the data resulting from the tube heater malfunction. However, since the instrument is technically not fully functional, this DQR is being issued. A repair attempt was made on June 7, 2007 that resulted in the tube temperatures reaching at times into the upper 50s and sometimes even the lower 60s. The high tube temps influenced the head temperature causing it to move into the upper 40s and sometimes the lower 50s. The heater was repaired on Oct 11, 2007. Though repaired, the instrument was configured to keep the tube temp in the lower 20s (deg C). This is acceptable, though to keep with instrument specifications the setting was adjusted to keep the temps in the upper 30s (deg C). This occurred on 8 Jan, 2008. |
| Measurements: | sgpnimfrC1.a0:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/03/2006 | 1509 | 03/06/2007 | 1610 |
| Subject: | SGP/SIRS/C1 - Reprocess: Incorrect calibration coefficients |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/03/2007 | 2005 | 01/23/2007 | 1930 |
| Subject: | SGP/SIRS/C1 - Upwelling LW cable problems |
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/2007 | 1400 | 04/22/2008 | 2052 |
| Subject: | SGP/SIRS/C1 - Sensor Cable Problem |
| DataStreams: | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/10/2007 | 0000 | 12/25/2007 | 2359 |
| Subject: |
|
| DataStreams: | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.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, 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, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0 |
| 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 |
|---|---|---|---|
| 06/01/2003 | 1200 | 09/27/2007 | 0017 |
| Subject: | SGP/RSS/C1 - Stability and nonlinearity corrections |
| DataStreams: | sgprssC1.00, sgprssC1.b1 |
| Description: | From the very beginning after deployment in May 2003 we observed several effects that we did not anticipate during the pre-deployment lab test. They were: (1) Rapid drop in responsivity; (2) Responsivity having 1/lambda wavelike periodicity; (3) Appearance of nonlinearity within 3 months; (4) Larger than expected diurnal wavelength changes and long term wavelength drift. Right away we responded with development of correction algorithms and methods. (1) and (2) are corrected to within 2-3% with biweekly lamp calibrations; (3) Nonlinearity factor is derived from calibration data and applied in correction; and (4) is efficiently corrected with Fourier correlation algorithm applied to every spectrum (once a minute). Furthermore we perform Langley regression processing (not a part of official data stream) that corrects longer term drifts in responsivity and should correct calibration lamp biases. The Vo's from Langley regressions are available via RSS web page. The overhaul of the instrument is planned to eliminate or at least reduce nonlinerarity stability problems. We hope that after the overhaul data processing would be simplified and the frequency of calibrations would be reduced. |
| Measurements: | sgprssC1.00:
sgprssC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/05/2000 | 2150 | 12/12/2000 | 1840 |
| 02/24/2001 | 1040 | 02/26/2001 | 2340 |
| 05/30/2001 | 0340 | 06/05/2001 | 1340 |
| 08/18/2001 | 0008 | 08/20/2001 | 1608 |
| 11/29/2001 | 1508 | 10/31/2002 | 2045 |
| 04/18/2004 | 2308 | 04/20/2004 | 2023 |
| 06/04/2004 | 1408 | 06/08/2004 | 1929 |
| 07/23/2004 | 2108 | 07/26/2004 | 1408 |
| 09/23/2005 | 1908 | 01/25/2006 | 2201 |
| 04/24/2006 | 2008 | 05/11/2006 | 2008 |
| 07/15/2006 | 1108 | 07/17/2006 | 1408 |
| 10/05/2007 | 1408 | 10/11/2007 | 1708 |
| 12/22/2007 | 1708 | 12/24/2007 | 0211 |
| Subject: | SGP/NIMFR/C1 - Missing data |
| DataStreams: | sgpnimfrC1.b1 |
| Description: | Data are missing and unrecoverable. |
| Measurements: | sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/16/2008 | 2000 | 11/01/2008 | 2359 |
| Subject: | SGP/NIMFR/C1 - Intermittent noise, 500nm |
| DataStreams: | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| Description: | Values of direct_normal_narrowband_filter2 (500 nm) were erratic at times, likely the result of a poor connection in the signal. The erratic behavior is last seen on 20081101, before the connectors were cleaned. |
| Measurements: | sgpnimfrlangplotC1.c1:
sgpnimfrC1.a0:
sgpnimfrlangleyC1.c1:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/18/2009 | 1751 | 07/31/2009 | 1645 |
| Subject: | SGP/SIRS/C1 - SW direct normal data drop out |
| DataStreams: | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/14/2009 | 0514 | 10/19/2009 | 2001 |
| Subject: | SGP/SIRS/C1 - Reprocessed: Upwelling shortwave |
| DataStreams: | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/23/2009 | 1200 | 10/31/2009 | 2000 |
| Subject: | SGP/NIMFR/C1 - Noise in 500nm channel |
| DataStreams: | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| Description: | The 500nm channel data were noisy at times, and at other times output "steps down" a notch. On 10/14, maintenance was performed to re-seat connection. On 10/31, the noise returned briefly, so the end-date has been extended through that date. |
| Measurements: | sgpnimfrlangplotC1.c1:
sgpnimfrC1.a0:
sgpnimfrlangleyC1.c1:
sgpnimfrC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/14/2009 | 1608 | 12/03/2009 | 2216 |
| Subject: | SGP/NIMFR/C1 - Tube heater |
| DataStreams: | sgpnimfrC1.a0, sgpnimfrC1.b1, sgpnimfrlangleyC1.c1, sgpnimfrlangplotC1.c1 |
| Description: | The function of the tube heater is to prevent dew from forming on the front window. During this period the tube heater was not functioning, there were no reports of dew, and there were no indications in the data that dew on the window was affecting data. |
| Measurements: | sgpnimfrlangplotC1.c1:
sgpnimfrC1.a0:
sgpnimfrC1.b1:
sgpnimfrlangleyC1.c1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/20/2010 | 0414 | 06/30/2010 | 1442 |
| Subject: | SGP/SIRS/C1 - Failed Upwelling SW cable |
| DataStreams: | sgpsirsC1.b1, sgpsirs20sC1.a0 |
| 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: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|