DQR ID | Subject | Data Streams Affected |
---|---|---|
D020814.12 | NSA/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded | nsaskyrad60sC2.b1 |
D020814.9 | NSA/SKYRAD/C1 - Reprocess: PIR identified as unshaded is really shaded | nsaskyrad60sC1.b1 |
D020913.7 | NSA/SKYRAD/C2 - Reprocess: IRT insufficiently heated | nsaskyrad60sC2.a1, nsaskyrad60sC2.b1 |
D030619.1 | NSA/SKYRAD/C2 - Solar tracker problem. | nsaskyrad60sC2.b1 |
D030819.2 | NSA/SKYRAD/C1 - IRT failed | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D030820.1 | NSA/SKYRAD/C1 - IRT incorrectly configured | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D030821.2 | NSA/SKYRAD/C1 - IRT incorrect min/max value | nsaskyrad60sC1.b1 |
D030821.3 | NSA/SKYRAD/C2 - IRT incorrect min/max values | nsaskyrad60sC2.b1 |
D031007.1 | NSA/SKYRAD/C2 - IRT measurements during precipitation events | nsaskyrad60sC2.b1 |
D031007.2 | NSA/SKYRAD/C1 - IRT measurements during precipitation events | nsaskyrad60sC1.b1 |
D040213.4 | NSA/SKYRAD/C1 - Downwelling IRT bias | nsaskyrad60sC1.b1 |
D040421.2 | NSA/SKYRAD/C1 - Tracker Inoperative | nsaskyrad60sC1.b1 |
D040421.3 | NSA/SKYRAD/C1 - itermittant IRT bias | nsaskyrad60sC1.b1 |
D051101.2 | NSA/SKYRAD/C1 - IRT failure | nsaskyrad60sC1.b1 |
D060209.5 | NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00 |
D071018.1 | NSA/SKYRAD/C1 - Missing data | nsaskyrad60sC1.b1 |
D071025.1 | NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D080107.2 | NSA/SKYRAD/C1 - Instrument cleaning effects | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D080222.3 | NSA/SKYRAD/C1 - IRT mirror heater failure | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D080418.1 | NSA/SKYRAD/C1 - Direct and Diffuse incorrect | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D080630.1 | NSA/SKYRAD/C1 - Tracker inoperative | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D080820.10 | NSA/SKYRAD/C2 - Station noise problem | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D090209.4 | NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated | nsaskyrad60sC1.b1 |
D090316.1 | NSA/SKYRAD/C2 - IRT failure | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D090318.1 | NSA/SKYRAD/C1 - IRT covered with snow | nsaskyrad60sC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/24/2002 | 0250 | 06/24/2002 | 2359 |
Subject: | NSA/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | On 5/24/02 the Global PIR was moved from the unshaded position on the Skyrad stand to a shaded spot on the tracker. It is still using the same Logger channel as it did as an unshaded PIR even though it is now shaded. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/15/2002 | 1905 | 06/24/2002 | 2359 |
Subject: | NSA/SKYRAD/C1 - Reprocess: PIR identified as unshaded is really shaded |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | On 5/15/02 the Global PIR was moved from the unshaded position on the Skyrad stand to a shaded spot on the tracker. It is still using the same Logger channel as it did as an unshaded PIR even though it is now shaded. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/1999 | 0000 | 05/23/2001 | 0610 |
Subject: | NSA/SKYRAD/C2 - Reprocess: IRT insufficiently heated |
DataStreams: | nsaskyrad60sC2.a1, nsaskyrad60sC2.b1 |
Description: | IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of sky temperature were over-estimated when instrument was below freezing. Data will be reprocessed, but users can correct data using the following correction factor: If T_reference < -5?C, then IRT_corrected = (IRT_original - 32.993K)/0.87238 where T_reference can be estimated with the ambient temperature (e.g. inst_down_long_hemisp_dome_temp or inst_down_long_dome_temp) |
Measurements: | nsaskyrad60sC2.a1:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/13/2003 | 0000 | 06/20/2003 | 1718 |
Subject: | NSA/SKYRAD/C2 - Solar tracker problem. |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | Beginning on 6/13, there was a problem with the solar tracker/shading at Atqasuk. The observed downwelling shortwave was not in good agreement with the theoretical value calculated from the direct, diffuse, and solar zenith angle, which usually indicates a tracking problem. The direct (NIP) data occasionally exhibited a stair-step pattern of dropping off slightly for a few minutes, then rising, then dropping off again, rather than the smooth increase during the hours of greater sunlight that is normally observed in clear sky conditions. This problem was resolved on the morning of 6/20. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2002 | 2330 | 06/27/2002 | 1920 |
Subject: | NSA/SKYRAD/C1 - IRT failed |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | |
Measurements: | nsaskyrad60sC1.a1:
nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/27/2002 | 1920 | 07/10/2002 | 1900 |
Subject: | NSA/SKYRAD/C1 - IRT incorrectly configured |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | The IRT was removed for repair and replaced with a spare that was not configured properly. Data are incorrect. |
Measurements: | nsaskyrad60sC1.a1:
nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 03/03/2003 | 2359 |
Subject: | NSA/SKYRAD/C1 - IRT incorrect min/max value |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The values of valid_min and valid_max for field sky_ir_temp were incorrectly assigned to -49.7 and +50.0 C, respectively. The actual values should be -60 and +40 C. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0248 | 03/01/2003 | 2359 |
Subject: | NSA/SKYRAD/C2 - IRT incorrect min/max values |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | The values of valid_min and valid_max for field sky_ir_temp were incorrectly assigned to -49.7 and +50.0 C, respectively. The actual values should be -60 and +40 C. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/21/1999 | 0000 | 06/01/2003 | 2130 |
Subject: | NSA/SKYRAD/C2 - IRT measurements during precipitation events |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | The IRT measurement of sky/cloud temperature was in question during precipitation events because rain or snow could accumulate in the upward-pointed lens barrel. This was corrected by reorienting the IRT to measure the sky temperature as reflected by a gold mirror. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/1999 | 0000 | 03/28/2003 | 0200 |
Subject: | NSA/SKYRAD/C1 - IRT measurements during precipitation events |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The IRT measurement of sky/cloud temperature was in question during precipitation events because rain or snow could accumulate in the upward-pointed lens barrel. This was corrected by reorienting the IRT to measure the sky temperature as reflected by a gold mirror. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2003 | 1200 | 01/09/2004 | 2120 |
Subject: | NSA/SKYRAD/C1 - Downwelling IRT bias |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The downwelling IRT was measuring higher sky/cloud temperatures than the AERI. The problem was corrected when the mirror was replaced. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/10/2003 | 0000 | 02/16/2004 | 0230 |
Subject: | NSA/SKYRAD/C1 - Tracker Inoperative |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | A blown fuse resulted in the tracker not shading the PIR and B&W and the NIP not following the sun. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/28/2003 | 0200 | 06/21/2006 | 0215 |
Subject: | NSA/SKYRAD/C1 - itermittant IRT bias |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky temperature measurement then a sudden correction, as compared to AERI, appears to have been caused by a combination of a failing IR detector, a poor signal cable, a contaminated (with condensation or frost) mirror or lens, and low ambient temperatures. The positive bias was apparently not consistant in either frequency or duration but on days when the unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. The instrument was repaired and recalibrated and the signal cable replaced. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/31/2005 | 0600 | 01/18/2006 | 0032 |
Subject: | NSA/SKYRAD/C1 - IRT failure |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The IRT failed and was replaced with a spare. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/2006 | 0910 | 02/07/2006 | 2350 |
Subject: | NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | During the power outage the downwelling global measurement from the PSP instrument and downwelling diffuse 8-48 instrument shows a slight increase from -5 to +0 W/m2. This is due to removal of thermal offsets induced by the AC heater during the power outage. This heater is installed within the PSP ventilator - it is necessary for the NSA/C1 climate. The downwelling longwave PIR instrument is unaffected due to case and dome temperature corrections. The IRT is AC powered and was not operational during this time period. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/29/1999 | 2041 | 08/05/1999 | 2359 |
09/23/2000 | 2257 | 09/25/2000 | 0119 |
03/15/2002 | 2036 | 03/18/2002 | 2035 |
09/07/2003 | 1103 | 09/19/2003 | 0201 |
11/05/2003 | 0339 | 11/07/2003 | 2234 |
01/03/2004 | 1153 | 01/06/2004 | 0031 |
Subject: | NSA/SKYRAD/C1 - Missing data |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/2007 | 0359 | 10/25/2007 | 2148 |
Subject: | NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | Installed Skyrad PSP (downwelling shortwave hemispheric irradiance) had calibration coefficient Rs applied when it should have used Rsc. ARM is using IR corrected Rsc and CFc coefficients for PSPs deployed at all facilities. PSP #32026 should use RSc@45=8.7578 ?V/W/m? and not Rs@45=8.6335. Reprocessed to correct downwelling shortwave hemispheric irradiance (DS) by: DS(new) = (DS(old) / 115.83 ) * 114.18 Reprocessing completed March 2008. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/16/2007 | 0000 | 12/24/2007 | 2359 |
Subject: | NSA/SKYRAD/C1 - Instrument cleaning effects |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | Starting Dec 16th the Skyrad PIR1 and PIR2 (down_long_hemispheric)started differing by greater than 30W/m2 at times. This is much greater than expected for these instruments (typical is <10-15 W/m2). NSA OMIS reports and observer comments reveal that PM periodically clean the snow from the IRT and ventilator fans on Skyrad and Gndrad. In the case of the Skyrad PIRs, one lies in the wind shadow of the other and builds up more snow which is periodically cleaned out and then builds up again causing the PIR1 PIR2 discrepancies. Disregard down_long_hemispheric during this time period. However, data suggests PIR2 is most likely at fault - potentially use PIR1 data during this time period. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/16/2007 | 0000 | 02/11/2008 | 1135 |
Subject: | NSA/SKYRAD/C1 - IRT mirror heater failure |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | The heater of the IRT gold mirror failed due to a broken wire (that probably occurred on 12/13 during maintenance of the solar tracker) allowing snow and frost to accumulate on the mirror until it was cleared during daily preventative maintenance. The problem was corrected when the heater wires were replaced. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/2008 | 0632 | 04/23/2008 | 1815 |
Subject: | NSA/SKYRAD/C1 - Direct and Diffuse incorrect |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | The short_direct_normal (NIP) instrument and cable were damaged by tracker rewind malfunction. Tracker and NIP replaced on 4/22 2200GMT but tracker not operational until 4/23 1815GMT. Thus, down_short_diffuse_hemisp (8-48) was not shaded 4/22 to 4/23. Do not use 8-48 data from 4/22 to 4/23. NIP data is not recoverable during entire time but can be estimated using component sum for each 1 minute data: Direct = (global - diffuse)/cos(zenith angle) |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/27/2008 | 2000 | 06/30/2008 | 1740 |
Subject: | NSA/SKYRAD/C1 - Tracker inoperative |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | Tracker stopped working at this site during the time range specified. Reason for failure is unknown. Tracker power cycled and restarted by maintenance 06/30 2008 1740 GMT. The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data are bad during this time. Data are not recoverable. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/18/2008 | 1930 | 08/20/2008 | 2200 |
08/22/2008 | 0930 | 08/22/2008 | 1930 |
08/25/2008 | 0000 | 08/26/2008 | 0100 |
08/27/2008 | 1000 | 08/28/2008 | 0130 |
Subject: | NSA/SKYRAD/C2 - Station noise problem |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | From 8/18 through 8/20 the logger battery voltage (vBatt) periodically jumps in voltage with noise on all differential measurements. The qc fields caught most of the down_long_hemisp MAX failures but the bad short_direct_normal, down_short_hemisp and down_short_diffuse_hemisp values were not flagged. Noise returned on 8/22, 8/25-26 and 8/27-28. Site Ops checked and re-routed the Sky stand grounds on 8/21 and performed additional ground re-work on 8/28. After that date, noise has not returned to the Skystand logger instruments. |
Measurements: | nsaskyrad60sC2.b1:
nsaskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/1999 | 0000 | 12/21/2000 | 1925 |
Subject: | NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of sky temperature were over-estimated when instrument was below freezing. Data will be reprocessed, but users can correct data using the following correction factor: If T_reference < -5?C, then IRT_corrected = (IRT_original - 32.993K)/0.87238 where T_reference can be estimated with the ambient temperature (e.g. inst_down_long_hemisp_dome_temp or inst_down_long_dome_temp) |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/06/2009 | 1500 | 03/20/2009 | 2245 |
Subject: | NSA/SKYRAD/C2 - IRT failure |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | The IRT failed and was replaced. |
Measurements: | nsaskyrad60sC2.b1:
nsaskyrad20sC2.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/20/2009 | 1900 | 02/24/2009 | 0130 |
Subject: | NSA/SKYRAD/C1 - IRT covered with snow |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | The IRT mirror was buried with snow by the dew-line snow-blower. |
Measurements: | nsaskyrad60sC1.b1:
|