DQR ID | Subject | Data Streams Affected |
---|---|---|
D040205.1 | SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers | sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0 |
D040226.2 | SGP/SIRS/E11 - PSP dome contamination | sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0 |
D040227.2 | SGP/SIRS/E16 - Tracker Misaligned | sgpsirsE16.b1, sgpsirs20sE16.a0 |
D040227.4 | SGP/SIRS/E15 - PSP dome contamination | sgpsirsE15.b1, sgpsirs20sE15.a0 |
D040303.1 | SGP/SIRS/E16 - PSP Dome Contamination | sgpsirsE16.b1, sgpsirs20sE16.a0 |
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 |
D040608.3 | SGP/SIRS/E15 - NIP cable failure results in missing data | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
D040615.5 | SGP/SIRS/E12 - Incorrect Times | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0, sgp1swfanalsirs1longE12.c1, sgp15swfanalsirs1longE12.c1 |
D040831.1 | SGP/SIRS/E1 - Reprocess: Incorrect shortwave radiometer calibration coefficients | sgpsirsE1.00, sgpsirsE1.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 | sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0 |
D041206.1 | SGP/SIRS/E10 - tracker failure | sgpsirsE10.00, sgpsirsE10.b1, sgpsirs20sE10.a0 |
D050106.4 | SGP/SIRS/C1 - Reprocess: UIR/DIR Incorrect calibration coefficients | sgpsirsC1.00, sgpsirsC1.b1 |
D050109.3 | SGP/SIRS/E12 - Ice obscured NIP | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0 |
D050114.5 | SGP/SIRS/E15 - Failed NIP cable | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
D050131.22 | SGP/SIRS/E11 - Ice storm | sgpsirsE11.b1, sgpsirs20sE11.a0 |
D050131.23 | SGP/SIRS/E15 - Ice storm | sgpsirsE15.b1, sgpsirs20sE15.a0 |
D050131.24 | SGP/SIRS/E16 - Ice storm | sgpsirsE16.b1, sgpsirs20sE16.a0 |
D050205.1 | SGP/SIRS/E1 - broken cable on DSDH (aka DD) measurment instrument - Eppley 8-48. | sgpsirsE1.00, sgpsirsE1.b1, sgpsirs20sE1.a0 |
D050205.4 | SGP/SIRS/E18 - Possible PSP dome contamination | sgpsirsE18.00, sgpsirsE18.b1, sgpsirs20sE18.a0 |
D050206.1 | SGP/BRS/C1 - Monthly Summary | sgpbrsC1.b1 |
D050206.2 | SGP/SIRS/C1 - Monthly Summary | sgpsirsC1.b1 |
D050206.3 | SGP/SIRS/E13 - Monthly Report | sgpsirsE13.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 |
D050429.1 | SGP/SIRS/E12 - Reprocess: Incorrect calibrations | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0 |
D050601.1 | SGP/SIRS/E13 - Reprocess: incorrect calibrations | sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sE13.a0 |
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 |
D060630.7 | SGP/BRS/C1 - Reprocessed: Longwave Calibration error | sgpbrsC1.b1 |
D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 |
D060630.9 | SGP/SIRS/E1 - Reprocessed: Longwave Calibration error | sgpsirsE1.b1 |
D061102.1 | SGP/BRS/C1 - Reprocess: Calibration error in Downwelling Longwave measurement | sgpbrsC1.b1, sgpbrs20sC1.a0 |
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: | sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0 |
Description: | A large discrepancy between the measured values of downwelling hemispheric shortwave radiation and the derived values occurred on 2/02 at the listed sites. The difference is on the order of 200 Wm^(-2) at E2 and to a lesser extent at the other affected stations. This problem most likely resulted from a previous day or night snow/ice accumulation on the Direct(NIP), Downwelling Sortwave(PSP) and/or Downwelling Diffuse(8-48) instruments. During the morning hours of 02/02, Approx 1300-2000GMT, snow/ice was covering one or more of these three instruments resulting in faulty readings and incorrect derived downwelling shortwave values as well. Instrument readings indicate the problem resolved itself later in the day through normal meltoff. |
Measurements: | sgpsirs20sE3.a0:
sgpsirsE3.00:
sgpsirs20sE5.a0:
sgpsirs20sE1.a0:
sgpsirsE1.b1:
sgpsirs20sE8.a0:
sgpsirsE2.b1:
sgpsirsE1.00:
sgpsirsE8.b1:
sgpsirs20sE2.a0:
sgpsirsE8.00:
sgpsirsE3.b1:
sgpsirsE5.b1:
sgpsirsE2.00:
sgpsirsE5.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2004 | 1500 | 03/01/2004 | 1300 |
Subject: | SGP/SIRS/E11 - PSP dome contamination |
DataStreams: | sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0 |
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: | sgpsirs20sE11.a0:
sgpsirsE11.b1:
sgpsirsE11.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/06/2004 | 2200 | 02/18/2004 | 1605 |
Subject: | SGP/SIRS/E16 - Tracker Misaligned |
DataStreams: | sgpsirsE16.b1, sgpsirs20sE16.a0 |
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 |
---|---|---|---|
02/20/2004 | 1900 | 02/29/2004 | 1700 |
Subject: | SGP/SIRS/E15 - PSP dome contamination |
DataStreams: | sgpsirsE15.b1, sgpsirs20sE15.a0 |
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: | sgpsirs20sE15.a0:
sgpsirsE15.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: | sgpsirsE16.b1, sgpsirs20sE16.a0 |
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 |
---|---|---|---|
03/18/2004 | 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 |
---|---|---|---|
06/03/2004 | 1122 | 06/08/2004 | 1700 |
Subject: | SGP/SIRS/E15 - NIP cable failure results in missing data |
DataStreams: | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
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: | sgpsirs20sE15.a0:
sgpsirsE15.00:
sgpsirsE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/19/2004 | 2212 | 03/10/2004 | 2247 |
Subject: | SGP/SIRS/E12 - Incorrect Times |
DataStreams: | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0, sgp1swfanalsirs1longE12.c1, sgp15swfanalsirs1longE12.c1 |
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: | sgpsirsE12.b1:
sgpsirsE12.00:
sgp15swfanalsirs1longE12.c1:
sgp1swfanalsirs1longE12.c1:
sgpsirs20sE12.a0:
|
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: | sgpsirsE1.00:
sgpsirsE1.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: | sgpsirsE11.00:
sgpsirsE11.b1:
|
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: | 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 |
---|---|---|---|
11/04/2004 | 1800 | 01/26/2005 | 1600 |
Subject: | SGP/SIRS/E10 - tracker failure |
DataStreams: | sgpsirsE10.00, sgpsirsE10.b1, sgpsirs20sE10.a0 |
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: | sgpsirsC1.00:
sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/06/2005 | 0000 | 01/07/2005 | 2359 |
Subject: | SGP/SIRS/E12 - Ice obscured NIP |
DataStreams: | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0 |
Description: | During the morning hours of 01/06, the direct normal shortwave readings are anomalously low in clear sky conditions, causing very large differences (approaching/exceeding 300 W/m^2) between the downwelling shortwave hemispheric (DSH) readings and the derived downwelling shortwave hemispheric readings. It would appear the NIP window had iced over during the previous days storm. The NIP window appears to have cleared itself by the morning of 2005/01/08. |
Measurements: | sgpsirsE12.b1:
sgpsirsE12.00:
sgpsirs20sE12.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/09/2005 | 0849 | 01/18/2005 | 1900 |
Subject: | SGP/SIRS/E15 - Failed NIP cable |
DataStreams: | sgpsirsE15.00, sgpsirsE15.b1, sgpsirs20sE15.a0 |
Description: | After the ice storm, the SHORT_DIRECT_NORMAL values were bad or missing continuously. Corrective Maintenance on 01/18 found the NIP cable had broken inside the Bendix connector. The NIP cable was repaired and returned to service. |
Measurements: | sgpsirs20sE15.a0:
sgpsirsE15.00:
sgpsirsE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0602 | 01/11/2005 | 1423 |
Subject: | SGP/SIRS/E11 - Ice storm |
DataStreams: | sgpsirsE11.b1, sgpsirs20sE11.a0 |
Description: | Data missing due to ice storm. |
Measurements: | sgpsirs20sE11.a0:
sgpsirsE11.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0202 | 01/09/2005 | 0848 |
Subject: | SGP/SIRS/E15 - Ice storm |
DataStreams: | sgpsirsE15.b1, sgpsirs20sE15.a0 |
Description: | Data missing due to an ice storm. |
Measurements: | sgpsirs20sE15.a0:
sgpsirsE15.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2005 | 0602 | 01/09/2005 | 1349 |
Subject: | SGP/SIRS/E16 - Ice storm |
DataStreams: | sgpsirsE16.b1, sgpsirs20sE16.a0 |
Description: | Data missing due to ice storm. |
Measurements: | sgpsirsE16.b1:
sgpsirs20sE16.a0:
|
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: | sgpsirsE1.00, sgpsirsE1.b1, sgpsirs20sE1.a0 |
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: | sgpsirsE1.00:
sgpsirs20sE1.a0:
sgpsirsE1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/03/2005 | 1200 | 02/15/2005 | 2250 |
Subject: | SGP/SIRS/E18 - Possible PSP dome contamination |
DataStreams: | sgpsirsE18.00, sgpsirsE18.b1, sgpsirs20sE18.a0 |
Description: | Downwelling shortwave hemispheric (DSH) measurements did not agree with derived DSH readings during the morning hours up to 1500GMT each clear day. PM cleaning on 2/16 2250 revealed nothing other than dirty water spots. A dirty or ice covered PSP dome may have been the cause, clearing itself before the PM crew arrived. |
Measurements: | sgpsirs20sE18.a0:
sgpsirsE18.b1:
sgpsirsE18.00:
|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
04/26/2005 | 1726 | 05/03/2005 | 1840 |
Subject: | SGP/SIRS/E12 - Reprocess: Incorrect calibrations |
DataStreams: | sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0 |
Description: | During site corrective maintenance to resolve an Extended Facility data collection problem, the SIRS.E12 datalogger was power cycled (1725 GMT). The datalogger reverted to an old SIRS program with incorrect S/Ns and calibration coefficients for all instruments at this station. The SW 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 107.27 118.68 up_short_hemisp 113.19 127.95 short_direct_normal 120.17 120.52 down_short_hemisp 118.46 102.11 The LW data were recalibrated and reprocessed as part of a larger LW calibration task. The reprocessed data were archived in October 2006. |
Measurements: | sgpsirsE12.b1:
sgpsirsE12.00:
sgpsirs20sE12.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2005 | 1409 | 06/02/2005 | 2205 |
Subject: | SGP/SIRS/E13 - Reprocess: incorrect calibrations |
DataStreams: | sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sE13.a0 |
Description: | After a long data gap on 5/25/2005, presumably a power outage, the following datastreams were showing incorrect values as well as incorrect calibration coefficients in the datalogger program: down_long_hemisp_shaded (downwelling PIR instrument) up_long_hemisp (upwelling PIR instrument) short_direct_normal (NIP instrument) The SIRS.E13 datalogger was power cycled (6/2/2005 2200GMT) and the correct program loaded into the SIRS datalogger and storage module. The data during this time range can be recalibrated as follows: First divide value by incorrectly applied cal coeff (first number) then multiply by correct cal coeff (second number) short_direct_normal 120.28 124.58 up_long_netir 0.2386 0.2595 down_long_netir 0.3052 0.2304 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 -18.3400 W/m^2\n, k1 0.2595 W/(m^2*uV)\n, k2 1.0380 unitless\n, k3 -2.7420 unitless\n, kr 0.0007044 K/uV\n, 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 -11.6300 W/m^2\n, k1 0.2304 W/(m^2*uV)\n, k2 1.0190 unitless\n, k3 -2.4230 unitless\n, kr 0.0007044 K/uV\n, |
Measurements: | sgpsirs20sE13.a0:
sgpsirsE13.00:
sgpsirsE13.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 |
---|---|---|---|
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 |
---|---|---|---|
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:
|
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:
|