| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D050117.1 | SGP/SIRS/E9 - Unknown -failed PSP ventilator fan | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D050131.26 | SGP/SIRS/E5 - Ice storm | sgpsirsE5.b1, sgpsirs20sE5.a0 |
| D050131.27 | SGP/SIRS/E6 - Ice storm | sgpsirsE6.b1, sgpsirs20sE6.a0 |
| D050131.28 | SGP/SIRS/E8 - Ice storm | sgpsirsE8.b1, sgpsirs20sE8.a0 |
| D050131.29 | SGP/SIRS/E9 - Ice storm | sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D050205.2 | SGP/SIRS/E6 - Questionable data due to Ice Storm damage | sgpsirsE6.00, sgpsirsE6.b1, sgpsirs20sE6.a0 |
| D050218.1 | SGP/SIRS/E7 - Reprocessed: Corrected Downwelling Longwave calibrations | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| D050414.2 | SGP/SIRS/E9 - Downwelling Shortwave values low | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D050606.1 | SGP/SIRS/E7 - Downwelling longwave incorrect | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| D050621.1 | SGP/SIRS/E9 - Sensor cable failure | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D050726.1 | SGP/SIRS/E4 - Dirt on Dome | sgpsirsE4.00, sgpsirsE4.b1, sgpsirs20sE4.a0 |
| D050801.1 | SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination | sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0 |
| D060523.1 | SGP/SIRS/E8 - Instrument cable problem | sgpsirsE8.b1, sgpsirs20sE8.a0 |
| D060703.1 | SGP/SIRS/E3 - Reprocess: Wrong Calibration Coefficients | sgpsirsE3.b1, sgpsirs20sE3.a0 |
| D060718.2 | SGP/SIRS/E9 - Tracker Failure | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D061208.1 | SGP/SIRS/E7 - Instrument noise | sgpsirsE7.b1, sgpsirs20sE7.a0 |
| D070205.2 | SGP/SIRS/E5 - Dirty radiometers | sgpsirsE5.00, sgpsirsE5.b1, sgpsirs20sE5.a0 |
| D070312.1 | SGP/SIRS/E9 - Tracker failure | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D070329.3 | SGP/SIRS/E9 - Downwelling SW cable problem | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| D070411.2 | SGP/SIRS/E7 - SIRS Power supply problems | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/23/2004 | 2315 | 01/25/2005 | 1800 |
| Subject: | SGP/SIRS/E9 - Unknown -failed PSP ventilator fan |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | Downwelling shortwave hemispheric (DSH) readings appear to have a slight to moderate negative offset from derived DSH values. At night, this negative offset causes qc flags (since values are below the minimum threshold of -10 W/m^2). Differences between derived and actual DSH values are sometimes on the order of 50 W/m^2 due to this offset. The offset was discovered to be due to a failed ventilator fan which is used to clear the dome of the PSP, the instrument which measures the DSH. The ventilator likely seized or was intermittent and heated the PSP base giving an erroneous DSH reading. Field techs replaced the fan on 01/25/2005 1745GMT. The DSH has been reading normally since that time. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/04/2005 | 2202 | 01/12/2005 | 2002 |
| Subject: | SGP/SIRS/E5 - Ice storm |
| DataStreams: | sgpsirsE5.b1, sgpsirs20sE5.a0 |
| Description: | Data missing due to ice storm. |
| Measurements: | sgpsirsE5.b1:
sgpsirs20sE5.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/05/2005 | 0202 | 01/09/2005 | 1630 |
| Subject: | SGP/SIRS/E6 - Ice storm |
| DataStreams: | sgpsirsE6.b1, sgpsirs20sE6.a0 |
| Description: | Data missing due to ice storm. |
| Measurements: | sgpsirs20sE6.a0:
sgpsirsE6.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/04/2005 | 2102 | 01/11/2005 | 1943 |
| Subject: | SGP/SIRS/E8 - Ice storm |
| DataStreams: | sgpsirsE8.b1, sgpsirs20sE8.a0 |
| Description: | Data missing due to ice storm. |
| Measurements: | sgpsirs20sE8.a0:
sgpsirsE8.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/05/2005 | 0702 | 01/09/2005 | 1448 |
| Subject: | SGP/SIRS/E9 - Ice storm |
| DataStreams: | sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | Data missing due to ice storm. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/13/2005 | 1200 | 02/10/2005 | 1700 |
| Subject: | SGP/SIRS/E6 - Questionable data due to Ice Storm damage |
| DataStreams: | sgpsirsE6.00, sgpsirsE6.b1, sgpsirs20sE6.a0 |
| Description: | Several SIRS readings at E6 readings have appeared questionable since the ice storm in early January. Starting on 01/13 maintenance found the E6 tracker inoperative. It was reset and put back into serivice. Shortly after, on 01/16 data from the DSH instrument (PSP) became questionable possibly due to obstructed or failed ventilator fan. On 02/10 1645 GMT maintenance found the DSH instrument ventilator fan failed - the fan was replaced, the E6 tracker was also realigned. Due to early january ice storms, the tracker alignment issues and a failed ventilator fan - All tracker mounted and global DS instrument measurements are suspect for this time frame. |
| Measurements: | sgpsirs20sE6.a0:
sgpsirsE6.00:
sgpsirsE6.b1:
|
| 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: | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| 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 |
|---|---|---|---|
| 03/30/2005 | 0103 | 04/19/2005 | 1720 |
| Subject: | SGP/SIRS/E9 - Downwelling Shortwave values low |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | Downwelling Shortwave Hemispheric (DSH) irradiance values from the pyranometer instrument were frequently below the MIN value of -10 W/m^2 at night. DSH values also frequently disagreed with derived readings (at times well over 50 W/m^2 difference) during the daylight hours, especially in the morning. Field techs performed maintenance but could not find obvious instrument or connection problems. The low DSH values during nighttime were on the threshold of acceptable. Largest offsets acceptable with these pyranometers is typically -10 W/m2. The large derived vs. actual DSH differences during the daylight hours are the subject of ongoing ARM investigation. No instrument problems could be identified. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/05/2005 | 1950 | 04/19/2005 | 2100 |
| Subject: | SGP/SIRS/E7 - Downwelling longwave incorrect |
| DataStreams: | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| 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 |
|---|---|---|---|
| 06/13/2005 | 2115 | 06/20/2005 | 2200 |
| Subject: | SGP/SIRS/E9 - Sensor cable failure |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | The short_direct_normal measurements from the normal incident pyrheliometer (NIP) instrument were missing beginning 6/13/2005 2115GMT. On 6/20/2005 technicians found the NIP instrument cable broken, replaced it, and returned the instrument to service at 2200GMT. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/16/2005 | 1412 | 07/27/2005 | 1600 |
| Subject: | SGP/SIRS/E4 - Dirt on Dome |
| DataStreams: | sgpsirsE4.00, sgpsirsE4.b1, sgpsirs20sE4.a0 |
| Description: | The downwelling shortwave hemispheric radiation data are suspect. The PSP dome appears to have been very dirty, especially during times when the sun angles were low. |
| Measurements: | sgpsirsE4.00:
sgpsirsE4.b1:
sgpsirs20sE4.a0:
|
| 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: | sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0 |
| 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: | sgpsirsE8.00:
sgpsirs20sE8.a0:
sgpsirsE8.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/22/2006 | 1300 | 05/30/2006 | 2020 |
| Subject: | SGP/SIRS/E8 - Instrument cable problem |
| DataStreams: | sgpsirsE8.b1, sgpsirs20sE8.a0 |
| 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: | sgpsirs20sE8.a0:
sgpsirsE8.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/14/2006 | 1612 | 07/12/2006 | 1830 |
| Subject: | SGP/SIRS/E3 - Reprocess: Wrong Calibration Coefficients |
| DataStreams: | sgpsirsE3.b1, sgpsirs20sE3.a0 |
| Description: | No data were collected from 6/7/2006 0000 to 6/14/2006 1612 due to hardware problems. When data resumed on 6/14, ALL calibration coefficients and serial numbers were for different instruments possibly due to incorrect program loaded on storage module. Correct program reloaded by PM/CM techs on 7/12 1830GMT Shortwave data can be corrected with a simple multiplier as shown below. Longwave data must be reprocessed from temperature and netIR data. The data can be recalibrated as follows: First divide value by incorrectly applied cal coeff (first number) then multiply by correct cal coeff (second number). down_short_diffuse_hemisp 109.52 110.31 up_short_hemisp 111.61 109.80 short_direct_normal 115.73 118.82 down_short_hemisp 122.47 117.34 up_long_netir 0.26525 0.2564 down_long_netir 0.27173 0.2695 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 0.00 W/m^2 k1 0.2564 W/(m^2*uV) k2 1.00 unitless k3 -4.00 unitless kr 0.000 K/uV 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 0.00 W/m^2 k1 0.2695 W/(m^2*uV) k2 1.00 unitless k3 -4.00 unitless kr 0.000 K/uV |
| Measurements: | sgpsirs20sE3.a0:
sgpsirsE3.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/12/2006 | 1100 | 07/21/2006 | 1635 |
| Subject: | SGP/SIRS/E9 - Tracker Failure |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | On July 12th the SIRS tracker failed to wake up that morning. On the 21st of July CM repaired the tracker. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/31/2006 | 0600 | 12/12/2006 | 2105 |
| Subject: | SGP/SIRS/E7 - Instrument noise |
| DataStreams: | sgpsirsE7.b1, sgpsirs20sE7.a0 |
| 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 |
|---|---|---|---|
| 01/23/2007 | 1500 | 01/30/2007 | 0000 |
| Subject: | SGP/SIRS/E5 - Dirty radiometers |
| DataStreams: | sgpsirsE5.00, sgpsirsE5.b1, sgpsirs20sE5.a0 |
| Description: | Snow or heavy dirt may have been covering one side of the PSP or 8-48 domes. The start of the problem coincides with a preciption event. We may assume that the offending substance was snow and it melted by 1/30/2007. PM after this time reports dry-light dust on radiometers. |
| Measurements: | sgpsirsE5.b1:
sgpsirs20sE5.a0:
sgpsirsE5.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/14/2007 | 0000 | 02/20/2007 | 1800 |
| Subject: | SGP/SIRS/E9 - Tracker failure |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | During this time range the solar tracker at E9 was not operating. PM on 2/20 1800GMT power cycled the tracker and it resumed normal operation. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/27/2007 | 0109 | 04/03/2007 | 1615 |
| Subject: | SGP/SIRS/E9 - Downwelling SW cable problem |
| DataStreams: | sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0 |
| Description: | The down_short_diffuse_hemispheric data were erratic beginning 0109 GMT March 27 2007. Found rodents had chewed DD cable. Repaired April 3rd 1625GMT. Data are not recoverable. However, it can be reconstructed using the following shortwave instrument relationship on a minute by minute basis: |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| 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: | sgpsirsE7.00, sgpsirsE7.b1, sgpsirs20sE7.a0 |
| 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:
|