| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D030901.1 | SGP/SIRS/E19 - Shadowband Misalignment | sgpsirs20sE19.a0, sgpsirsE19.00, sgpsirsE19.b1 |
| D030922.4 | SGP/SIRS/E27 - Tracker Misalignment | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1 |
| D030922.5 | SGP/SIRS/E2 - Ventilator Fan Failure | sgpsirs20sE2.a0, sgpsirsE2.00, sgpsirsE2.b1 |
| D031020.1 | SGP/SIRS/E1 - failed SIRS multiplexer | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| D031020.2 | SGP/SIRS/E9 - Possible instrument drift | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| D031020.3 | SGP/SIRS/E18 - Instrument noise problem | sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1 |
| D031020.4 | SGP/SIRS/E21 - Bird Poop Contamination | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| D031118.1 | SGP/SIRS/E1 - Unknown - Downwelling shaded longwave measurement incorrect | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| D031124.8 | SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP) | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
| D031208.6 | SGP/SIRS/E4 - Shadowband Misalignment | sgpsirs20sE4.a0, sgpsirsE4.00, sgpsirsE4.b1 |
| D040126.3 | SGP/SIRS/E21 - False signal | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.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 |
| D040226.1 | SGP/SIRS/E9 - PSP dome contamination | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| D040226.2 | SGP/SIRS/E11 - PSP dome contamination | sgpsirs20sE11.a0, sgpsirsE11.00, sgpsirsE11.b1 |
| D040227.2 | SGP/SIRS/E16 - Tracker Misaligned | sgpsirs20sE16.a0, sgpsirsE16.b1 |
| D040227.3 | SGP/SIRS/E2 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE2.00, sgpsirsE2.b1 |
| D040227.4 | SGP/SIRS/E15 - PSP dome contamination | sgpsirs20sE15.a0, sgpsirsE15.b1 |
| D040229.2 | SGP/SIRS/E21 - Shadowband Misalignment | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| D040303.1 | SGP/SIRS/E16 - PSP Dome Contamination | sgpsirs20sE16.a0, sgpsirsE16.b1 |
| D040320.1 | SGP/SIRS/E5 - anomalously low NIP readings | sgpsirs20sE5.a0, sgpsirsE5.00, sgpsirsE5.b1 |
| D040320.2 | SGP/SIRS/E8 - Possible Contamination of DS PSP instrument | sgpsirs20sE8.a0, sgpsirsE8.00, sgpsirsE8.b1 |
| D040322.1 | SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric | sgpsirs20sC1.a0, sgpsirsC1.b1 |
| D040329.1 | SGP/SIRS/E21 - Instrument logger time problem, Unknown | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| D040405.2 | SGP/SIRS/E7 - PSP dome contamination | sgpsirs20sE7.a0, sgpsirsE7.b1 |
| D040420.2 | SGP/SIRS/E5 - Dirt on PSP Dome | sgpsirs20sE5.a0, sgpsirsE5.00, sgpsirsE5.b1 |
| D040420.4 | SGP/SIRS/E27 - incorrect tracking | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1 |
| D040601.1 | SGP/SIRS/E21 - Dirt on dome | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| D040608.3 | SGP/SIRS/E15 - NIP cable failure results in missing data | sgpsirs20sE15.a0, sgpsirsE15.00, sgpsirsE15.b1 |
| D040615.5 | SGP/SIRS/E12 - Incorrect Times | sgp15swfanalsirs1longE12.c1, sgp1swfanalsirs1longE12.c1, sgpsirs20sE12.a0, sgpsirsE12.00, sgpsirsE12.b1 |
| D040621.3 | SGP/SIRS/E7 - Reprocessed: Corrected downwelling longwave calibrations | sgpsirsE7.b1 |
| D040706.1 | SGP/SIRS/E22 - Failed NIP sensor cable | sgpsirs20sE22.a0, sgpsirsE22.00, sgpsirsE22.b1 |
| D040712.3 | SGP/SIRS/E24 - NIP shaded near sunrise | sgpsirs20sE24.a0, sgpsirsE24.b1 |
| D040831.1 | SGP/SIRS/E1 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE1.00, sgpsirsE1.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 |
| D040831.4 | SGP/SIRS/E10 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE10.00, sgpsirsE10.b1 |
| D040831.5 | SGP/SIRS/E11 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE11.00, sgpsirsE11.b1 |
| D040903.1 | SGP/SIRS/E11 - Reprocessed: Incorrect upwelling longwave calibrations | sgpsirsE11.b1 |
| D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirs20sC1.a0, sgpsirs20sE13.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1 |
| D041206.1 | SGP/SIRS/E10 - tracker failure | sgpsirs20sE10.a0, sgpsirsE10.00, sgpsirsE10.b1 |
| D050106.4 | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1 |
| D050117.1 | SGP/SIRS/E9 - Unknown -failed PSP ventilator fan | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| D050205.1 | SGP/SIRS/E1 - broken cable on DSDH (aka DD) measurment instrument - Eppley 8-48. | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| D050206.2 | SGP/SIRS/C1 - Monthly Summary | sgpsirsC1.b1 |
| D050206.3 | SGP/SIRS/E13 - Monthly Report | sgpsirsE13.b1 |
| D050218.1 | SGP/SIRS/E7 - Reprocessed: Corrected Downwelling Longwave calibrations | sgpsirsE7.b1 |
| D060630.10 | SGP/SIRS/E2 - Reprocessed: Longwave Calibration error | sgpsirsE2.b1 |
| D060630.11 | SGP/SIRS/E3 - Reprocessed: Longwave Calibration error | sgpsirsE3.b1 |
| D060630.12 | SGP/SIRS/E4 - Reprocessed: Longwave Calibration error | sgpsirsE4.b1 |
| D060630.13 | SGP/SIRS/E5 - Reprocessed: Longwave Calibration error | sgpsirsE5.b1 |
| D060630.14 | SGP/SIRS/E6 - Reprocessed: Longwave Calibration error | sgpsirsE6.b1 |
| D060630.15 | SGP/SIRS/E7 - Reprocessed: Longwave Calibration error | sgpsirsE7.b1 |
| D060630.16 | SGP/SIRS/E8 - Reprocessed: Longwave Calibration error | sgpsirsE8.b1 |
| D060630.17 | SGP/SIRS/E9 - Reprocessed: Longwave Calibration error | sgpsirsE9.b1 |
| D060630.18 | SGP/SIRS/E10 - Reprocessed: Longwave Calibration error | sgpsirsE10.b1 |
| D060630.19 | SGP/SIRS/E11 - Reprocessed: Longwave Calibration error | sgpsirsE11.b1 |
| D060630.20 | SGP/SIRS/E12 - Reprocessed: Longwave Calibration error | sgpsirsE12.b1 |
| D060630.21 | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error | sgpsirsE13.b1 |
| D060630.22 | SGP/SIRS/E15 - Reprocessed: Longwave Calibration error | sgpsirsE15.b1 |
| D060630.23 | SGP/SIRS/E16 - Reprocessed: Longwave Calibration error | sgpsirsE16.b1 |
| D060630.24 | SGP/SIRS/E18 - Reprocessed: Longwave Calibration error | sgpsirsE18.b1 |
| D060630.25 | SGP/SIRS/E19 - Reprocessed: Longwave Calibration error | sgpsirsE19.b1 |
| 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 |
| D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 |
| D060630.9 | SGP/SIRS/E1 - Reprocessed: Longwave Calibration error | sgpsirsE1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/28/2003 | 1200 | 09/04/2003 | 1526 |
| Subject: | SGP/SIRS/E19 - Shadowband Misalignment |
| DataStreams: | sgpsirs20sE19.a0, sgpsirsE19.00, sgpsirsE19.b1 |
| Description: | The solar tracker appears to have failed on 8/28. Fuse replaced on 09/04/03 and tracker returned to service at 15:26GMT |
| Measurements: | sgpsirsE19.b1:
sgpsirs20sE19.a0:
sgpsirsE19.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/14/2003 | 1200 | 10/15/2003 | 1730 |
| Subject: | SGP/SIRS/E27 - Tracker Misalignment |
| DataStreams: | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1 |
| Description: | Suntracker failed at this facility. The suntracker was reset on
9/17, but this only temporarily fixed the problem and the tracker
began failing again 9/18. Tracker was reset and realigned on
10/15/03 17:30GMT and has been operating properly since. |
| Measurements: | sgpsirsE27.00:
sgpsirsE27.b1:
sgpsirs20sE27.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/14/2003 | 1000 | 09/25/2003 | 1543 |
| Subject: | SGP/SIRS/E2 - Ventilator Fan Failure |
| DataStreams: | sgpsirs20sE2.a0, sgpsirsE2.00, sgpsirsE2.b1 |
| Description: | Measured downwelling shortwave data was very questionable, reporting nighttime values as low as -50 W/m^2, while differing from calculated downwelling shortwave by as much as 50 W/m^2 lower during the day. The first indication of a problem was around 10 UTC, 9/14, when measured DS values suddenly dropped below 10 W/m^2 for about a 2 hour period before sunrise, then were consistently lower than calculated DS by as much as 40 W/m^2 during the day. The problem got progressively worse with time until the ventilator fan was replace on 9/25. Ventilator fan failure changed the fundamental operating characteristics of this PSP and resulted in unpredictable biased measurements which cannot be corrected without additional empirical characterization of the radiometer in question. |
| Measurements: | sgpsirsE2.b1:
sgpsirs20sE2.a0:
sgpsirsE2.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/14/2003 | 2023 | 10/21/2003 | 1930 |
| Subject: | SGP/SIRS/E1 - failed SIRS multiplexer |
| DataStreams: | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| Description: | Beginning 10/14, a failed multiplexer resulted in missing
downwelling shortwave data and downwelling and upwelling
longwave data which were much too low. The multiplexer
handles data for the longwave instruments (UIR and DIR)
case and dome temperatures as well as the downwelling shortwave
hemispheric instrument (DS). |
| Measurements: | sgpsirs20sE1.a0:
sgpsirsE1.b1:
sgpsirsE1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/14/2003 | 0000 | 10/21/2003 | 1600 |
| Subject: | SGP/SIRS/E9 - Possible instrument drift |
| DataStreams: | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| Description: | Downwelling shortwave values were too low, dropping below -10 W/m^2
at night and reading 30-50 W/m^2 lower than DS calculated from
direct and diffuse measurements during the day. This problem became
more noticeable beginning on 10/14, when nighttime values began to
drop below -10 W/m^2 consistently. The problem was corrected with
the annual instrument changout on 10/23/03.
Although the downwelling shortwave instrument (DS) appears to be the
problem a more likely scenario is that the cable connections became
thermopile. The instrument changeout possibly reseated and corrected
any poor connections. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/09/2003 | 1000 | 10/20/2003 | 0000 |
| Subject: | SGP/SIRS/E18 - Instrument noise problem |
| DataStreams: | sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1 |
| Description: | Upwelling longwave data was somewhat noisy during this period. There
was a direct relation to the case and dome thermistor measurements for
the upwelling longwave PIR (UIR). Data quality does not appear to be
greatly affected overall, though instantaneous values had greater
than usual variability. The noise disappeared on 10/19. |
| Measurements: | sgpsirs20sE18.a0:
sgpsirsE18.b1:
sgpsirsE18.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/18/2003 | 1600 | 10/29/2003 | 1630 |
| Subject: | SGP/SIRS/E21 - Bird Poop Contamination |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | Downwelling shortwave values were erratic during the day on 10/18 and in very poor agreement at times with downwelling shortwave values calculated from direct and diffuse measurements. Bi-weekly preventative maintenace records indicate bird poop was cleaned from the downwelling shortwave instrument on 10/29 at 16:30. Review of maintenance records and instrument data indicate no bird contamination since 10/29. Turkey vultures are the usual suspects in data quality problems at this facility. The RBD(rotating bird deterrent) had failed the week of 10/13 and is awaiting parts. However, beginning in late October the birds had left the site. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/11/2003 | 0438 | 11/18/2003 | 2200 |
| Subject: | SGP/SIRS/E1 - Unknown - Downwelling shaded longwave measurement incorrect |
| DataStreams: | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| Description: | Downwelling longwave values were very noisy and out of range
due to a missing PIR case temperature measurement. Faulty
wiring to the case temperature thermistor on the downwelling
longwave IR instrument (PIR) was the likely cause of
the problem.
On 11/18, the E1 tracker and associated instruments (direct
shortwave -NIP, hemispheric shaded shortwave -8-48 and
hemispheric shaded longwave - problem PIR) were moved to a new
tracker stand. Rewiring the instrument corrected the problem. |
| Measurements: | sgpsirs20sE1.a0:
sgpsirsE1.b1:
sgpsirsE1.00:
|
| 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 |
|---|---|---|---|
| 12/04/2003 | 1700 | 12/08/2003 | 1200 |
| Subject: | SGP/SIRS/E4 - Shadowband Misalignment |
| DataStreams: | sgpsirs20sE4.a0, sgpsirsE4.00, sgpsirsE4.b1 |
| Description: | The solar tracker failed on 12/4, resulting in bad direct and
diffuse measurements. The tracker started working again on 12/8
without Ops intervention. Technician maintenance checks on 12/3
and 12/17 reported correct tracker operation. |
| Measurements: | sgpsirsE4.00:
sgpsirsE4.b1:
sgpsirs20sE4.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/19/2003 | 0000 | 02/26/2004 | 2359 |
| Subject: | SGP/SIRS/E21 - False signal |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | During clear-sky conditions, downwelling shortwave values spike downward approximately 50 to 200 W/m^2 around 22:15 UTC for about 15 minutes. This problem occurs at about the same time for the same duration each day during the indicated period of the year. This effect is due to a shadow from the Rotating Bird Deterrent (RBD) installed earlier in the year to prevent extensive bird droppings at the site. The RBD is installed at such a location that it will partially shade the downwelling shortwave PSP from 19 October to 23 February of the year. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
| 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: | sgpsirs20sE5.a0:
sgpsirsE2.b1:
sgpsirsE1.00:
sgpsirsE2.00:
sgpsirs20sE3.a0:
sgpsirsE3.b1:
sgpsirs20sE1.a0:
sgpsirsE8.00:
sgpsirsE3.00:
sgpsirsE5.b1:
sgpsirsE1.b1:
sgpsirsE5.00:
sgpsirs20sE2.a0:
sgpsirs20sE8.a0:
sgpsirsE8.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1600 | 02/23/2004 | 0500 |
| Subject: | SGP/SIRS/E9 - PSP dome contamination |
| DataStreams: | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| Description: | Measured values of diffuse shortwave downwelling radiation fluctuated below derived values of downwelling shortwave radiation by 50 W/m^2 during the afternoon hours under clear conditions. SMOS precipitation and wind speed data reveals rain and wind the night before on 02/20/03 0100 GMT probably contaminated the PSP dome with dirt. Precipitation of .25mm on 02/23/04 0300 seems to have effectively cleared the PSP dome since PSP data on 02/24/04 compares correctly to direct and diffuse components. |
| Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
sgpsirsE9.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1500 | 03/01/2004 | 1300 |
| Subject: | SGP/SIRS/E11 - PSP dome contamination |
| DataStreams: | sgpsirs20sE11.a0, sgpsirsE11.00, sgpsirsE11.b1 |
| Description: | Measured values of diffuse shortwave downwelling radiation fluctuated below derived values of downwelling shortwave radiation during the afternoon hours under clear conditions, probably due to a dirty PSP dome. SMOS precipitation and wind speed data reveal rain and wind on 02/19/03 at 2300 GMT probably contaminated the PSP dome with dirt. Precipitation of .4mm on 02/29/04 1400 seems to have effectively cleared the PSP dome since PSP data on 03/01/04 compares correctly to direct and diffuse components. |
| Measurements: | sgpsirsE11.b1:
sgpsirsE11.00:
sgpsirs20sE11.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/06/2004 | 2200 | 02/18/2004 | 1605 |
| Subject: | SGP/SIRS/E16 - Tracker Misaligned |
| DataStreams: | sgpsirs20sE16.a0, sgpsirsE16.b1 |
| Description: | Direct Normal Shortwave (NIP) values may be reduced by tracker misalignment (tracker clock slow by 2 minutes 10 sec on 2/18/04). Downwelling Diffuse (DD) values may be increased by the tracker misalignment. Error amounts can not be accurately quantified. |
| Measurements: | sgpsirsE16.b1:
sgpsirs20sE16.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/12/2004 | 1612 | 03/25/2004 | 1600 |
| Subject: | SGP/SIRS/E2 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
| DataStreams: | sgpsirsE2.00, sgpsirsE2.b1 |
| Description: | During the pyrgeometer instrument (PIR) changout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements were : downwelling diffuse (DD), upwelling shortwave(US), direct normal (NIP) and downwelling shortwave(DS) 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)*118.11 US(corrected) = (US/113.19)*118.21 NIP(corrected)= (NIP/120.17)*119.08 DS(corrected) = (DS/118.46)*117.33 |
| Measurements: | sgpsirsE2.b1:
sgpsirsE2.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1900 | 02/29/2004 | 1700 |
| Subject: | SGP/SIRS/E15 - PSP dome contamination |
| DataStreams: | sgpsirs20sE15.a0, sgpsirsE15.b1 |
| Description: | PSP dome was dirty. Afternoon values of downwelling shortwave radiation were less than derived values by about 50 W/m^2. PSP values compare well to derived PSP values after precip event on 02/29/04 1300-1600 GMT. Maintenance on 03/02 1713 GMT revealed no unusual contamination. Precip on 02/29 likely effectively cleaned the PSP dome. |
| Measurements: | sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1300 | 03/03/2004 | 1300 |
| Subject: | SGP/SIRS/E21 - Shadowband Misalignment |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | The NIP reported values close to zero and downwelling shortwave global and diffuse were equivalent due to tracker failure. Maintenance replaced tracker 2/27, but couldn't replace instruments until 03/02 2000 GMT due to bird poop contamination. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/06/2004 | 2200 | 02/18/2004 | 1605 |
| Subject: | SGP/SIRS/E16 - PSP Dome Contamination |
| DataStreams: | sgpsirs20sE16.a0, sgpsirsE16.b1 |
| Description: | Downwelling Shortwave (DS) values near 22:00 GMT during clear skys are lower than expected due to contamination of pyranometer dome. A dime-sized spot of dirt was found on the southwest portion of the pyranometer dome. DS values for cloudy conditions during this period are also suspect, but the amount of irradiance reduction are not significant. |
| Measurements: | sgpsirsE16.b1:
sgpsirs20sE16.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/17/2004 | 1843 | 03/28/2004 | 0300 |
| Subject: | SGP/SIRS/E5 - anomalously low NIP readings |
| DataStreams: | sgpsirs20sE5.a0, sgpsirsE5.00, sgpsirsE5.b1 |
| Description: | Direct normal (NIP instrument) irradiance readings fall anomalously on 3/17 18:43GMT to less than half the expected values during clear sky conditions. NIP readings returned to normal on 3/28/04 12:00. Maintenance on 3/29/04 19:48 revealed no unusual contaminents. Precipitation on 3/27 (measured by the SMOS system) probably cleared the NIP window of contaminents before scheduled maintenance. |
| Measurements: | sgpsirsE5.b1:
sgpsirs20sE5.a0:
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: | sgpsirsE8.00:
sgpsirs20sE8.a0:
sgpsirsE8.b1:
|
| 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: | sgpsirs20sC1.a0, sgpsirsC1.b1 |
| 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: | sgpsirsC1.b1:
sgpsirs20sC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/21/2004 | 1200 | 03/24/2004 | 0200 |
| Subject: | SGP/SIRS/E21 - Instrument logger time problem, Unknown |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | Values of diffuse hemispheric shortwave radiation differ from derived values by at most 70 Wm^(-2). The incident appears to be isolated to 3/21, 3/22, and 3/23. An estimation of solar noon using downwelling shortwave hemispheric irradiance from the PSP shows solar noon to oocur at around 1845GMT on 3/21. Calculated solar noon occurs at E21 at 1831GMT for 3/21/2004. There appears to be a time discrepancy in the datalogger for these dates. 04/01 is the next date with enough sun to determine solar noon and compare to calculated. The data from this date appears correct. Ronald Reed [rreed@ops.sgp.arm.gov] reports the logger did not receive any reportable time updates during the late March time period. We don't know what happened during these three dates but from 3/24 on data looks acceptable. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
| 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 |
|---|---|---|---|
| 04/11/2004 | 1200 | 05/05/2004 | 1645 |
| Subject: | SGP/SIRS/E5 - Dirt on PSP Dome |
| DataStreams: | sgpsirs20sE5.a0, sgpsirsE5.00, sgpsirsE5.b1 |
| Description: | The PSP dome was dirty. The magnitude of differences from derived
vs. measured values of downwelling shortwave were about 75 W/m^2.
Preventative maintenance on 4/21 cleaned instruments but they
became dirty again immediately afterward and continued to be
so until the next PM on 5/5. |
| Measurements: | sgpsirsE5.b1:
sgpsirs20sE5.a0:
sgpsirsE5.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/14/2004 | 1700 | 09/15/2004 | 1650 |
| 10/27/2004 | 1500 | 11/05/2004 | 1900 |
| Subject: | SGP/SIRS/E27 - incorrect tracking |
| DataStreams: | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1 |
| Description: | The solar tracker at E27 was not functioning properly. The problem affected tracker mounted instruments: downwelling diffuse 8-48 and direct normal pyrheliometer NIP. After tracker adjustment on 4/14/2004 1700GMT the tracker stopped tracking properly during afternoon hours. Attempts to correct tracker operation throughout the failure period resulted in variations on incorrect tracker operation. No replacement tracker was available. After adjustment on 9/15/2004 the tracker problem was resolved. It is unclear what, other than typical az and zen tracker software changes by field techs, corrected the problem. This problem period corresponds to the first time range specified (4/14 to 9/15). On 10/27/2004 a replacement tracker was installed at E27. Technical difficulties kept tracker out of service until 11/05/2004. The replacement tracker at E27 was put into serice by the field techs on 11/05/2004 1830GMT. The tracker has been tracking correctly since this time. This problem period corresponds to the second time range (10/27 to 11/05). |
| Measurements: | sgpsirsE27.00:
sgpsirsE27.b1:
sgpsirs20sE27.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/28/2004 | 1500 | 06/09/2004 | 1342 |
| Subject: | SGP/SIRS/E21 - Dirt on dome |
| DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
| Description: | Measured downwelling shortwave values differed from calculated
(direct + diffuse) by +/-100 W/m^2 in the afternoon. Pattern of
differences is indicative of a dirty downwelling shortwave dome.
Maintenance on 6/9 cleaned water spots on the dome. Other
downwelling instruments may have also been dirty during this
period. |
| Measurements: | sgpsirsE21.00:
sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/03/2004 | 1122 | 06/08/2004 | 1700 |
| Subject: | SGP/SIRS/E15 - NIP cable failure results in missing data |
| DataStreams: | sgpsirs20sE15.a0, sgpsirsE15.00, sgpsirsE15.b1 |
| Description: | The NIP began reporting -9999 (missing) for all direct normal
downwelling shortwave radiation. Maintenance 6/8 revealed a
broken cable. Cable was repaired and NIP data returned to normal. |
| Measurements: | sgpsirsE15.00:
sgpsirsE15.b1:
sgpsirs20sE15.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/19/2004 | 2212 | 03/10/2004 | 2247 |
| Subject: | SGP/SIRS/E12 - Incorrect Times |
| DataStreams: | sgp15swfanalsirs1longE12.c1, sgp1swfanalsirs1longE12.c1, sgpsirs20sE12.a0, sgpsirsE12.00, sgpsirsE12.b1 |
| Description: | The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the clock was corrected by -5600.177269 seconds on March 10th at 22:47 GMT. The recorded times for observations are off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds on March 10th. |
| Measurements: | sgp1swfanalsirs1longE12.c1:
sgpsirsE12.b1:
sgp15swfanalsirs1longE12.c1:
sgpsirs20sE12.a0:
sgpsirsE12.00:
|
| 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 |
|---|---|---|---|
| 06/30/2004 | 0156 | 07/07/2004 | 1800 |
| Subject: | SGP/SIRS/E22 - Failed NIP sensor cable |
| DataStreams: | sgpsirs20sE22.a0, sgpsirsE22.00, sgpsirsE22.b1 |
| Description: | The suntracker was driven past it optical limit switch and pulled the direct normal (NIP) instrument cable from its connector. |
| Measurements: | sgpsirs20sE22.a0:
sgpsirsE22.b1:
sgpsirsE22.00:
|
| 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: | sgpsirs20sE24.a0:
sgpsirsE24.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/10/2004 | 2050 | 04/20/2004 | 2015 |
| Subject: | SGP/SIRS/E1 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
| DataStreams: | sgpsirsE1.00, sgpsirsE1.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)*109.01 US(corrected) = (US/113.19)*111.47 NIP(corrected)= (NIP/120.17)*114.82 DS(corrected) = (DS/118.46)*116.51 |
| Measurements: | sgpsirsE1.b1:
sgpsirsE1.00:
|
| 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: | sgpsirsE8.00:
sgpsirsE8.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1630 | 04/21/2004 | 1425 |
| Subject: | SGP/SIRS/E10 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
| DataStreams: | sgpsirsE10.00, sgpsirsE10.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 SGP/SIRS/E10 and each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)*114.63 US(corrected) = (US/113.19)*117.46 NIP(corrected)= (NIP/120.17)*119.26 DS(corrected) = (DS/118.46)*122.78 |
| Measurements: | sgpsirsE10.b1:
sgpsirsE10.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/17/2004 | 1741 | 05/05/2004 | 0000 |
| Subject: | SGP/SIRS/E11 - Reprocess: Incorrect shortwave radiometer calibration coefficients |
| DataStreams: | sgpsirsE11.00, sgpsirsE11.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) Field tech reports the datalogger program was corrected on 4/27/04. Archive data review shows this was not the case and the corrected datalogger program was uploaded sometime late day 5/4/04. The end date for this DQR was chosen to be 5/5/04 0000 the first full day of the correct datalogger program. 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)*123.27 US(corrected) = (US/113.19)*127.75 NIP(corrected)= (NIP/120.17)*126.69 DS(corrected) = (DS/118.46)*126.56 |
| Measurements: | sgpsirsE11.b1:
sgpsirsE11.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/04/2004 | 0000 | 06/22/2004 | 1855 |
| Subject: | SGP/SIRS/E11 - Reprocessed: Incorrect upwelling longwave calibrations |
| DataStreams: | sgpsirsE11.b1 |
| Description: | Incorrect calibration coefficients were applied to the upwelling longwave measurements due to an error in the instrument configuration file. The data have been reprocessed to apply corrected calibrations. The reprocessed data were archived in August 2006. |
| Measurements: | sgpsirsE11.b1:
|
| 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: | sgpsirs20sC1.a0, sgpsirs20sE13.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1 |
| Description: | After the DIR changeout on 8/27, the DLH measurements at the central facility vary significantly between pyrgeometers by as much as 65 Wm^(-2). It was discovered that the two downwelling pyrgeometers destined for C1 and E13 may have been swapped during installation. The instrument mentor is unsure of applied calibration coefficients during this DQR's time period. Backing out new downwelling longwave irradiances would be difficult in this case. Fortunately, the problem period is less than a fortnight. |
| Measurements: | sgpsirsE13.b1:
sgpsirsC1.b1:
sgpsirsC1.00:
sgpsirs20sE13.a0:
sgpsirs20sC1.a0:
sgpsirsE13.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/04/2004 | 1800 | 01/26/2005 | 1600 |
| Subject: | SGP/SIRS/E10 - tracker failure |
| DataStreams: | sgpsirs20sE10.a0, sgpsirsE10.00, sgpsirsE10.b1 |
| Description: | During the night of 11/05-06 2004 the tracker failed at this location. During CM on 12/01, power cycling returned the tracker to service. However, tracker was not properly tracking in the AM. Tracker failed again sometime near 01/01/2005. CM on reloaded the tracker program and realigned the tracker on 01/26/2005 1600GMT. It has been working correctly since this time. |
| Measurements: | sgpsirsE10.b1:
sgpsirsE10.00:
sgpsirs20sE10.a0:
|
| 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.b1:
sgpsirsC1.00:
|
| 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: | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
| 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 |
|---|---|---|---|
| 12/30/2004 | 2100 | 02/08/2005 | 2055 |
| Subject: | SGP/SIRS/E1 - broken cable on DSDH (aka DD) measurment instrument - Eppley 8-48. |
| DataStreams: | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
| Description: | Occasionally, the downwelling shortwave diffuse hemispheric (DSDH) readings spike to unreasonably low levels, causing derived downwelling shortwave hemispheric (DSH) readings to spike well below the actual DSH readings. Technicians repaired the DSDH instument (an Eppley 8-48) cable on 02/08/2005 2055GMT. There have been no dropouts since that time. |
| Measurements: | sgpsirs20sE1.a0:
sgpsirsE1.b1:
sgpsirsE1.00:
|
| 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 |
|---|---|---|---|
| 12/01/2004 | 0000 | 01/01/2005 | 0000 |
| Subject: | SGP/SIRS/E13 - Monthly Report |
| DataStreams: | sgpsirsE13.b1 |
| Description: | :Data quality this site-month is good. The offset for the Global PSP is about -7 W/m^2. The dominant problem here is the daytime 3 component problem. Direct and Diffuse are always too high and Global is too low. The problem occurs around the time that the testing regime switches from twilight to daytime testing regimes or from daytime to twilight. The flags occur in significant numbers on the 1st - 5th, 7th - 20th, 24th - 28th, 30th, and 31st. The failures vary in magnitude and duration. The worst flags for a particular respect to this problem. Global goes below daytime empirical limits on both the 5th and 6th for substantial periods of time. Diffuse also goes below daytime empirical limits on the 6th in the afternoon. Upwelling Longwave is below empirical limits on the 24th. This may not be a problem, as many sites exhibited the same problem on the same night. Exceptionally cold temperatures may be the cause. |
| Measurements: | sgpsirsE13.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 02/12/2004 | 1630 | 02/23/2005 | 1615 |
| Subject: | SGP/SIRS/E2 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE2.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: | sgpsirsE2.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/10/2004 | 1715 | 02/08/2006 | 1730 |
| Subject: | SGP/SIRS/E3 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE3.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in March 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 August 2006. |
| Measurements: | sgpsirsE3.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/10/2004 | 1720 | 02/22/2006 | 1615 |
| Subject: | SGP/SIRS/E4 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE4.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in March 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: | sgpsirsE4.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/10/2004 | 2030 | 02/22/2006 | 1817 |
| Subject: | SGP/SIRS/E5 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE5.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in March 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: | sgpsirsE5.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/11/2004 | 1610 | 02/09/2006 | 1553 |
| Subject: | SGP/SIRS/E6 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE6.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in March 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: | sgpsirsE6.b1:
|
| 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 |
|---|---|---|---|
| 12/17/2003 | 1640 | 02/07/2006 | 1730 |
| Subject: | SGP/SIRS/E9 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE9.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 instanteous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE9.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/20/2004 | 1730 | 02/07/2006 | 2130 |
| Subject: | SGP/SIRS/E10 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE10.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 August 2006. |
| Measurements: | sgpsirsE10.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/17/2004 | 1753 | 02/14/2006 | 2016 |
| Subject: | SGP/SIRS/E11 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE11.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 August 2006. |
| Measurements: | sgpsirsE11.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/22/2003 | 1640 | 02/14/2006 | 1710 |
| Subject: | SGP/SIRS/E12 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE12.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE12.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/11/2003 | 1935 | 02/16/2006 | 1905 |
| Subject: | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE13.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE13.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/22/2003 | 1650 | 02/14/2006 | 1806 |
| Subject: | SGP/SIRS/E15 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE15.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE15.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/23/2003 | 1605 | 02/15/2006 | 1533 |
| Subject: | SGP/SIRS/E16 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE16.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE16.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/22/2003 | 2200 | 02/14/2006 | 2100 |
| Subject: | SGP/SIRS/E18 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE18.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE18.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/24/2003 | 1600 | 02/16/2006 | 1558 |
| Subject: | SGP/SIRS/E19 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE19.b1 |
| Description: | Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
| Measurements: | sgpsirsE19.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 |
|---|---|---|---|
| 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 |
|---|---|---|---|
| 02/10/2004 | 2055 | 02/21/2006 | 2007 |
| Subject: | SGP/SIRS/E1 - Reprocessed: Longwave Calibration error |
| DataStreams: | sgpsirsE1.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: | sgpsirsE1.b1:
|