DQR ID | Subject | Data Streams Affected |
---|---|---|
D010720.1 | NSA/SKYRAD/C2 - Reprocess: Calibration error | nsaskyrad20sC2.a1, nsaskyrad60sC2.a1, nsaskyrad60sC2.b1 |
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 |
D021111.1 | NSA/SKYRAD/C1 - Unshaded PIR data unreasonable | nsaskyrad60sC1.a1 |
D021111.10 | NSA/SKYRAD/C1 - Unshaded PIR maintenance | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.11 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.12 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.13 | NSA/SKYRAD/C1 - Shaded PIR data unreasonable | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.14 | NSA/SKYRAD/C1 - Shaded PIR data unreasonable | nsaskyrad60sC1.a1 |
D021111.15 | NSA/SKYRAD/C1 - Corrupted Shaded PIR data | nsaskyrad60sC1.a1 |
D021111.16 | NSA/SKYRAD/C1 - Shaded PIR data unreasonable | nsaskyrad60sC1.a1 |
D021111.17 | NSA/SKYRAD/C1 - Unshaded and Shaded PIR data bad | nsaskyrad60sC1.a1 |
D021111.18 | NSA/SKYRAD/C1 - Unshaded and Shaded PIR data bad | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.19 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.2 | NSA/SKYRAD/C1 - Corrupted Unshaded PIR data | nsaskyrad60sC1.a1 |
D021111.20 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.21 | NSA/SKYRAD/C1 - Shaded PIR data suspect | nsaskyrad60sC1.a1 |
D021111.22 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.23 | NSA/SKYRAD/C1 - Shaded PIR data incorrect | nsaskyrad60sC1.a1 |
D021111.3 | NSA/SKYRAD/C1 - Spikes in Unshaded PIR data | nsaskyrad60sC1.a1 |
D021111.4 | NSA/SKYRAD/C1 - Discontinuity in Unshaded PIR data | nsaskyrad60sC1.a1 |
D021111.5 | NSA/SKYRAD/C1 - Unshaded PIR data incorrect | nsaskyrad60sC1.a1 |
D021111.6 | NSA/SKYRAD/C1 - Unshaded PIR maintenance | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.7 | NSA/SKYRAD/C1 - Miscalibrated Unshaded PIR data | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.8 | NSA/SKYRAD/C1 - Noise in Unshaded PIR data | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.9 | NSA/SKYRAD/C1 - Unshaded PIR maintenance | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021213.1 | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight | nsaskyrad60sC1.a1 |
D021213.2 | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021213.3 | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight | nsaskyrad60sC1.a1 |
D021213.4 | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D030304.1 | NSA/SKYRAD/C1: Noisy PIR data at Barrow | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D030510.2 | NSA/SKYRAD/C1 - IRT measurements during precipitation events | nsaskyrad60sC1.a1 |
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 |
D031226.1 | NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too large | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
D040129.2 | NSA/SKYRAD/C1 - Noisy PIR data at Barrow | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D040213.4 | NSA/SKYRAD/C1 - Downwelling IRT bias | nsaskyrad60sC1.b1 |
D040415.1 | NSA/SKYRAD/C1 - direct normal pyhrheliometer (NIP)shaded by WWRp | nsaskyrad60sC1.b1, nsaskyradC1.00 |
D040421.2 | NSA/SKYRAD/C1 - Tracker Inoperative | nsaskyrad60sC1.b1 |
D040421.3 | NSA/SKYRAD/C1 - itermittant IRT bias | nsaskyrad60sC1.b1 |
D040523.1 | NSA/SKYRAD/C1 - Frosting and Condensation | nsaskyrad20sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
D040523.2 | NSA/SKYRAD/C2 - Frosting and Condensation | nsaskyrad20sC2.a1, nsaskyrad60sC2.b1, nsaskyradC2.00 |
D050604.1 | NSA/SKYRAD/C1 - Datalogger grounding problem | nsaskyrad20sC1.a0, nsaskyrad20sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
D051101.2 | NSA/SKYRAD/C1 - IRT failure | nsaskyrad60sC1.b1 |
D051107.2 | NSA/SKYRAD/C1 - Instrument logger, possible gounding problem | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00 |
D051202.1 | NSA/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D051202.2 | NSA/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D060209.5 | NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments | nsaskyrad20sC1.a0, nsaskyradC1.00, nsaskyrad60sC1.b1 |
D060217.2 | NSA/SKYRAD/C1 - Instrument noise | nsaskyrad60sC1.b1, nsaskyrad20sC1.a0 |
D060630.37 | NSA/SKYRAD/C1 - Reprocess: Longwave Calibration error | nsaskyrad60sC1.b1 |
D060630.38 | NSA/SKYRAD/C2 - Reprocess: Longwave Calibration error | nsaskyrad60sC2.b1 |
D060724.1 | NSA/SKYRAD/C2 - Summer solstice shading of radiometers | nsaskyrad60sC2.b1 |
D060724.2 | NSA/SKYRAD/C1 - Summer solstice shading of radiometers | nsaskyrad60sC1.b1 |
D071002.1 | NSA/SKYRAD/C1 - Preventive maintenance | nsaskyrad60sC1.b1, nsaskyrad20sC1.a0 |
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 |
D080825.1 | NSA/SKYRAD/C1 - IRT signal bias | nsaskyrad60sC1.a1 |
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 |
D091208.1 | NSA/SKYRAD/C2 - IRT Grounding | nsaskyrad60sC2.b1 |
D100211.1 | NSA/SKYRAD/C1 - Frosting/Condensation | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D100401.1 | NSA/SKYRAD/C2 - NIP Frost or Ice | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D100805.1 | NSA/SKYRAD/C2 - Instrument grounding problem | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D101229.1 | NSA/SKYRAD/C2 - Suspect PIR1 | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
D110513.9 | NSA/QCRAD/C1 - Incorrect value of solar zenith angle | nsaqcrad1longC1.c1, nsaqcrad1longC1.s1 |
D110516.1 | NSA/SKYRAD/C1 - | nsaskyrad60sC1.b1 |
D110817.6 | NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficients | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D110902.1 | NSA/SKYRAD/C1 - Incorrect data during power outage | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
D111010.1 | NSA/SKYRAD/C1 - Noisy data due to grounding issue | nsaqcrad1longC1.c1, nsaskyrad60sC1.b1 |
D981212.1 | NSA/SKYRAD - Barrow SKYRAD PIRD Misconfiguration 12/9 - 12/12/98 | nsaskyrad20sC1.a1, nsaskyrad60sC1.a1 |
D990108.2 | NSA/SKYRAD/C1 - IRT removed for repair | nsaskyrad60sC1.a1, nsaskyradC1.00 |
D990108.5 | NSA/SKYRAD/C1 - IRT removed from service | nsaskyrad60sC1.a1, nsaskyradC1.00 |
D990924.2 | NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated | nsaskyrad60sC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/06/2001 | 2300 | 07/19/2001 | 0100 |
Subject: | NSA/SKYRAD/C2 - Reprocess: Calibration error |
DataStreams: | nsaskyrad20sC2.a1, nsaskyrad60sC2.a1, nsaskyrad60sC2.b1 |
Description: | Due to confusion over ARM calibration policy, a revised calibration was installed and was in place for the duration of the time period indicated. When the error was noted, the original calibration was re-installed. Users may notice discontinuities in PIRd data at the time boundaries of this DQR. Data will be reprocessed. |
Measurements: | nsaskyrad20sC2.a1:
nsaskyrad60sC2.b1:
nsaskyrad60sC2.a1:
|
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.b1:
nsaskyrad60sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/1999 | 2200 | 01/12/1999 | 2230 |
01/17/1999 | 0500 | 01/17/1999 | 0730 |
01/24/1999 | 1200 | 01/24/1999 | 1400 |
02/13/1999 | 0700 | 02/13/1999 | 2359 |
02/19/1999 | 0545 | 02/20/1999 | 1030 |
02/20/1999 | 2115 | 02/21/1999 | 0200 |
Subject: | NSA/SKYRAD/C1 - Unshaded PIR data unreasonable |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Periods of very large negative values. Negative readings of thermistors caused concurrent calculation in logger of temperature to fail. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/1999 | 2115 | 04/14/1999 | 2145 |
Subject: | NSA/SKYRAD/C1 - Unshaded PIR maintenance |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | During this time, the PIR unshaded was swapped on the SKYRAD stand. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0300 | 10/28/1998 | 0500 |
10/29/1998 | 0600 | 10/29/1998 | 0800 |
11/07/1998 | 0100 | 11/07/1998 | 0400 |
11/12/1998 | 0300 | 11/12/1998 | 1200 |
11/23/1998 | 0900 | 11/23/1998 | 2100 |
Subject: | NSA/SKYRAD/C1 - PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | PIR shaded and PIR unshaded show unusual differences during this time period, frosting or icing is the most probable explanation but we don't know for sure. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/26/2001 | 0900 | 04/26/2001 | 1800 |
Subject: | NSA/SKYRAD/C1 - PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | PIR shaded and PIR unshaded show unusual differences during this time period, frosting or icing is the most probable explanation but we don't know for sure. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/05/2001 | 0000 | 11/07/2001 | 2010 |
Subject: | NSA/SKYRAD/C1 - Shaded PIR data unreasonable |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Scientificly unreasonable data values, the problem disappeared after the datalogger was exchanged with the spare. The data logger was exchanged on 11/7 at 20:10 GMT. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/1999 | 2200 | 01/12/1999 | 2230 |
01/17/1999 | 0500 | 01/17/1999 | 0730 |
01/24/1999 | 1200 | 01/24/1999 | 1400 |
02/13/1999 | 0700 | 02/13/1999 | 2359 |
02/19/1999 | 0545 | 02/20/1999 | 1030 |
02/20/1999 | 2115 | 02/21/1999 | 0200 |
Subject: | NSA/SKYRAD/C1 - Shaded PIR data unreasonable |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Periods of very large negative values. Negative readings of thermistors causes concurrent calculation in logger of temperature to fail. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/18/1998 | 2105 | 11/18/1998 | 2110 |
11/20/1998 | 0340 | 11/20/1998 | 0350 |
11/20/1998 | 2010 | 11/20/1998 | 2020 |
11/24/1998 | 0330 | 11/24/1998 | 0340 |
11/25/1998 | 0145 | 11/25/1998 | 0150 |
11/25/1998 | 2030 | 11/25/1998 | 2035 |
11/26/1998 | 0300 | 11/26/1998 | 0310 |
11/26/1998 | 1530 | 11/26/1998 | 1540 |
11/27/1998 | 0110 | 11/27/1998 | 0120 |
11/27/1998 | 0840 | 11/27/1998 | 0850 |
11/27/1998 | 0925 | 11/27/1998 | 0935 |
11/27/1998 | 1940 | 11/27/1998 | 1950 |
11/28/1998 | 0655 | 11/28/1998 | 0705 |
11/29/1998 | 0450 | 11/29/1998 | 0505 |
11/29/1998 | 2335 | 11/29/1998 | 2350 |
Subject: | NSA/SKYRAD/C1 - Corrupted Shaded PIR data |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Erroneous data due to file truncation problem during logger download and corresponding ingest problems when the truncated lines were read. Problem was identified in a PIF submitted by Rune Storvold |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/1998 | 2225 | 12/11/1998 | 2235 |
12/15/1998 | 1800 | 12/15/1998 | 1810 |
12/16/1998 | 1810 | 12/16/1998 | 1815 |
02/16/1999 | 1945 | 02/16/1999 | 2010 |
02/17/1999 | 2145 | 02/17/1999 | 2200 |
03/02/1999 | 1825 | 03/02/1999 | 1835 |
03/09/1999 | 1830 | 03/09/1999 | 1840 |
03/10/1999 | 0340 | 03/10/1999 | 0350 |
Subject: | NSA/SKYRAD/C1 - Shaded PIR data unreasonable |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | There was a 10-25 W/m2 spike in data probably due to operator working around instrument or cleaning it. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/17/1999 | 1700 | 01/17/1999 | 1815 |
Subject: | NSA/SKYRAD/C1 - Unshaded and Shaded PIR data bad |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Large unreasonable spikes and some missing data points. Cause of problem unknown. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/1999 | 2115 | 04/14/1999 | 2145 |
Subject: | NSA/SKYRAD/C1 - Unshaded and Shaded PIR data bad |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Data during this time period is corrupted (seen as a dip in the measurements). During this time, the PIR unshaded was being replaced on the SKYRAD stand. This work affected the shaded PIR as well due to the presence of the operators in it's field of view. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/28/1998 | 0300 | 10/28/1998 | 0500 |
10/29/1998 | 0600 | 10/29/1998 | 0800 |
11/07/1998 | 0100 | 11/07/1998 | 0400 |
11/12/1998 | 0300 | 11/12/1998 | 1200 |
11/23/1998 | 0900 | 11/23/1998 | 2100 |
Subject: | NSA/SKYRAD/C1 - PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | PIR shaded and PIR unshaded show unusual differences during this time period, frosting or icing is one possible explanation but we don't know. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/1998 | 2000 | 11/14/1998 | 2005 |
11/18/1998 | 2105 | 11/18/1998 | 2110 |
11/20/1998 | 0340 | 11/20/1998 | 0350 |
11/20/1998 | 2010 | 11/20/1998 | 2020 |
11/24/1998 | 0330 | 11/24/1998 | 0340 |
11/25/1998 | 0145 | 11/25/1998 | 0150 |
11/25/1998 | 2030 | 11/25/1998 | 2035 |
11/26/1998 | 0300 | 11/26/1998 | 0310 |
11/26/1998 | 1530 | 11/26/1998 | 1540 |
11/27/1998 | 0110 | 11/27/1998 | 0120 |
11/27/1998 | 0840 | 11/27/1998 | 0850 |
11/27/1998 | 0925 | 11/27/1998 | 0935 |
11/27/1998 | 1940 | 11/27/1998 | 1950 |
11/28/1998 | 0655 | 11/28/1998 | 0705 |
11/29/1998 | 0450 | 11/29/1998 | 0505 |
11/29/1998 | 2335 | 11/29/1998 | 2350 |
Subject: | NSA/SKYRAD/C1 - Corrupted Unshaded PIR data |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Erroneous data due to file truncation problem during logger download and corresponding ingest problems when the truncated lines were read. Problem was identified in a PIF submitted by Rune Storvold |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/25/2001 | 1000 | 04/25/2001 | 1900 |
04/26/2001 | 0900 | 04/26/2001 | 1800 |
Subject: | NSA/SKYRAD/C1 - PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | PIR shaded and PIR unshaded show unusual differences during this time period, frosting or icing is one possible explanation but we don't know. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/08/1998 | 0000 | 12/15/1998 | 1200 |
Subject: | NSA/SKYRAD/C1 - Shaded PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | The instrument had incorrect calibration settings on two accounts: 1. From 12/09 to 12/12, the calibration was set incorrectly. 2. The dome correction coefficients were not properly set until the early morning of 12/14. The erroneous settings caused an error probably less than 4%. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/14/1998 | 0000 | 02/04/1999 | 2359 |
Subject: | NSA/SKYRAD/C1 - PIR data suspect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | The PIR unshaded and the PIR shaded have a persistent offset between them, ranging from 0 to 10 W/m2. It is particularly apparent during clear sky. The line of sight of the PIRd is obstructed making it difficult to assess the problem. The instrument was moved to its proper location in early February. The problem seems to have resolved itself with the move. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/11/1999 | 0000 | 02/11/1999 | 2359 |
Subject: | NSA/SKYRAD/C1 - Shaded PIR data incorrect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | There were two sudden increases (about 50-100 W/m2) at 23:00 and 24:00. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/1998 | 2200 | 12/01/1998 | 2359 |
01/28/1999 | 0145 | 01/28/1999 | 0200 |
03/02/1999 | 1820 | 03/02/1999 | 1835 |
03/10/1999 | 1740 | 03/10/1999 | 1750 |
03/13/1999 | 1745 | 03/13/1999 | 1755 |
Subject: | NSA/SKYRAD/C1 - Spikes in Unshaded PIR data |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | There was a 10-25 W/m2 spike in data probably due to operator working around instrument or cleaning it. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/03/1999 | 2300 | 02/03/1999 | 2310 |
Subject: | NSA/SKYRAD/C1 - Discontinuity in Unshaded PIR data |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | There was a sudden increase in irradiance (from 140 to 190 W/m2) at 02/03/99 23:00. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/08/1998 | 0000 | 12/10/1998 | 2359 |
Subject: | NSA/SKYRAD/C1 - Unshaded PIR data incorrect |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Data from this time period is incorrect because instrument was swapped out for calibration and correct calibrations were not entered for replacement. Some missing data during this time interval as well |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/15/2001 | 2345 | 03/16/2001 | 0045 |
Subject: | NSA/SKYRAD/C1 - Unshaded PIR maintenance |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Unreasonable data from 3/15 23:45 until 3/16 0:45 due to exchange of PIR instrument to the PIR spare (32054F3). This was done so the PIR could go to NOAA/CMDL in Boulder for calibration as part of the IPARSC II IOP and be included in this work. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/16/2001 | 0045 | 03/25/2001 | 0235 |
Subject: | NSA/SKYRAD/C1 - Miscalibrated Unshaded PIR data |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Calibration coefficient for PIR spare (32054F3) was updated on 3/25 2:35 GMT. The old PIR cal coefficient was used during this period. The PIR spare (32054F3) was calibrated by NOAA/CMDL in Boulder prior to the IOP and replacement on 3/16 when the original station PIR was shipped to Boulder for a post IOP calibration. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/06/2001 | 1000 | 11/07/2001 | 2359 |
Subject: | NSA/SKYRAD/C1 - Noise in Unshaded PIR data |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Noise increased and an offset from shaded PIR became apparent during this period. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/1999 | 2300 | 04/01/1999 | 2359 |
Subject: | NSA/SKYRAD/C1 - Unshaded PIR maintenance |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | A new PIR was installed during this time period by Phil Utley. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1998 | 0000 | 08/10/1998 | 0000 |
Subject: | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Around local midnight 9:30-10:30 GMT during summer clear sky the normal incidence pyranometer is shaded by the instrument stand.This causes the reading to be 0 W/m2. If cosine correction is applied for irradiance calulations this effect is negligible due to the low solar angle. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1999 | 0000 | 08/10/1999 | 0000 |
05/01/2000 | 0000 | 08/10/2000 | 0000 |
05/01/2001 | 0000 | 08/10/2001 | 0000 |
05/01/2002 | 0000 | 08/10/2002 | 0000 |
Subject: | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Around local midnight 9:30-10:30 GMT during summer clear sky the normal incidence pyranometer is shaded by the instrument stand.This causes the reading to be 0 W/m2. If cosine correction is applied for irradiance calulations this effect is negligible due to the low solar angle. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1998 | 0000 | 08/10/1998 | 0000 |
Subject: | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Just past local midnight (11:00-11:40 GMT during summer clear sky) the global hemispherical pyranometer is shaded by the MFRSR instrument for about 40 minutes. This causes the reading to be 0 W/m2. This effect would be negligible in a daily average due to the low solar angle. |
Measurements: | nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/1999 | 0000 | 08/10/1999 | 0000 |
05/01/2000 | 0000 | 08/10/2000 | 0000 |
05/01/2001 | 0000 | 08/10/2001 | 0000 |
05/01/2002 | 0000 | 08/10/2002 | 0000 |
Subject: | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | Just past local midnight (11:00-11:40 GMT during summer clear sky) the global hemispherical pyranometer is shaded by the MFRSR instrument for about 40 minutes. This causes the reading to be 0 W/m2. This effect would be negligible in a daily average due to the low solar angle. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/24/2002 | 0000 | 06/24/2002 | 2359 |
Subject: | NSA/SKYRAD/C1: Noisy PIR data at Barrow |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | PIR1 data is noisy throughout the entire period, though there is still a definite signal through the noise. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/14/1998 | 2330 | 03/03/2003 | 2359 |
Subject: | NSA/SKYRAD/C1 - IRT measurements during precipitation events |
DataStreams: | nsaskyrad60sC1.a1 |
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.a1:
|
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.b1:
nsaskyrad60sC1.a1:
|
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.b1:
nsaskyrad60sC1.a1:
|
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 |
---|---|---|---|
08/20/2001 | 0000 | 01/23/2002 | 0000 |
Subject: | NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too large |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | This problem only became apparent as NSA C1 nights became long enough for full darkness. The shaded global diffuse instrument (Eppley 8-48) showed a negative nighttime offset larger than the expected 0 to -4 W/m2. Typically -5 to -8 W/m2. This size of offset is not uncommon with Eppley PSPs but not observed with Eppley 8-48s. The problem was corrected with replacement of mounting screws which were creating a ground loop. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/2002 | 0000 | 01/16/2003 | 2359 |
Subject: | NSA/SKYRAD/C1 - Noisy PIR data at Barrow |
DataStreams: | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
Description: | PIR1 data is noisy throughout the entire period, though there is still a definite signal through the noise. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad60sC1.a1:
|
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 |
---|---|---|---|
04/09/2004 | 1500 | 04/16/2004 | 1600 |
Subject: | NSA/SKYRAD/C1 - direct normal pyhrheliometer (NIP)shaded by WWRp |
DataStreams: | nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | Direct normal radiation values drop nearly to zero from about 1515 GMT - 1525 GMT from 4/05 to 4/16 2004. Field observation reveals the WWRp is shading the NIP instrument during this time. This shading event was expected to occur several months after the soltice as well but archive data showed no shading on or around 8/30/2004. The direct normal instrument was apparently only shaded during the time period noted. |
Measurements: | nsaskyradC1.00:
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 |
---|---|---|---|
05/13/2004 | 0000 | 05/18/2004 | 0000 |
Subject: | NSA/SKYRAD/C1 - Frosting and Condensation |
DataStreams: | nsaskyrad20sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | The operators in both Barrow and Atqasuk reported significant ice buildup during nights for the period specified, with the ice melting during the days. This condition is reported in preventative maintenance reports as continuing until on or near 5/18/2004. However, review of data shows no discernable radiometer icing. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.b1:
nsaskyrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2004 | 0000 | 05/18/2004 | 0000 |
Subject: | NSA/SKYRAD/C2 - Frosting and Condensation |
DataStreams: | nsaskyrad20sC2.a1, nsaskyrad60sC2.b1, nsaskyradC2.00 |
Description: | The operators in both Barrow and Atqasuk reported significant ice buildup during nights for the period specified, with the ice melting during the days. This condition is reported in preventative maintenance reports as continuing until on or near 5/18/2004. However, review of data shows no discernable radiometer icing. |
Measurements: | nsaskyrad20sC2.a1:
nsaskyradC2.00:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/2005 | 1100 | 05/13/2005 | 2000 |
05/19/2005 | 0830 | 05/24/2005 | 1800 |
05/28/2005 | 1730 | 05/29/2005 | 1800 |
05/31/2005 | 1500 | 06/04/2005 | 0900 |
06/10/2005 | 0300 | 06/10/2005 | 0400 |
Subject: | NSA/SKYRAD/C1 - Datalogger grounding problem |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad20sC1.a1, nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | Both PIRs reported unreasonable high readings with coincident low reading from the IRT. Since both PIR instruments exhibited exactly the same behaviour and the IRT an opposite response during large suspect data excursions this indicates that the false signal maybe the result of poor grounding. The PIR1,2 data and the IRT data are most adversely affected. During the problem periods PIR irradiance increased (typ pos 200-300W/m2) while the IRT response was negative (typ neg 20-30W/m2) but followed the response of the PIR. The Skyrad shortwave instruments were also affected but to much less extent (within their uncertainties). Data quality flags are typically not triggered during these problem periods. Data logger grounding was improved on 6/10 2005. The problem hasn't re-occurred since that time. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.b1:
nsaskyrad20sC1.a1:
nsaskyrad20sC1.a0:
|
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 |
---|---|---|---|
10/22/2005 | 1230 | 10/22/2005 | 1600 |
Subject: | NSA/SKYRAD/C1 - Instrument logger, possible gounding problem |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00 |
Description: | Possible Skyrad datalogger grounding issues have re-appeared at NSA/C1 for only this short time period. Anomalous data readings during the time range specified are similar to problem which occurred in early summer 2005. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/04/2004 | 1900 | 09/09/2005 | 2142 |
Subject: | NSA/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were installed. The result of no delay in these measurements results in an error in the measured resistance of the thermistors, Case1 and Dome2 and thus the calculated PIR1 and PIR2 irradiances. The errors are inversely proportial to temperature. Users can apply the temperature dependent irradiance corrections shown in the table below. Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 W/m2. The error corrections become the same order of magnitude or larger than the instrument uncertainties at or below 260K or 9F. Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance DIR1 DIR1 DIR2 DIR2 T[F] Tcase[K] Correction[W/m2] Tdome[K] Correction[W/m2] 109.4 316.13 0.00 316.13 0.00 100.5 311.20 -0.15 311.20 0.12 93.2 307.14 -0.12 307.14 0.10 87.0 303.70 -0.10 303.70 0.08 81.6 300.70 -0.17 300.70 0.14 77.0 298.15 -0.22 298.15 0.18 59.4 288.35 -0.34 288.35 0.27 47.4 281.72 -0.23 281.72 0.18 38.5 276.74 -0.42 276.74 0.34 31.3 272.77 -0.48 272.77 0.38 25.4 269.48 -0.61 269.48 0.49 20.3 266.67 -0.67 266.67 0.54 16.0 264.25 -0.82 264.25 0.66 12.1 262.11 -0.98 262.11 0.79 8.7 260.19 -0.97 260.19 0.78 5.6 258.46 -1.07 258.46 0.86 2.7 256.89 -1.17 256.89 0.94 0.1 255.44 -1.33 255.44 1.07 -2.3 254.11 -1.41 254.11 1.13 -4.5 252.87 -1.43 252.87 1.15 -6.6 251.71 -1.52 251.71 1.22 -8.5 250.63 -1.63 250.63 1.31 -10.4 249.62 -1.73 249.62 1.39 -12.2 248.58 -1.79 248.58 1.44 -15.4 246.82 -1.93 246.82 1.55 -18.3 245.23 -2.05 245.23 1.65 -20.9 243.78 -2.22 243.78 1.78 -23.3 242.44 -2.36 242.44 1.89 -25.5 241.21 -2.58 241.21 2.07 -27.5 240.07 -2.65 240.07 2.13 -29.5 239.01 -2.75 239.01 2.21 -31.3 238.00 -3.02 238.00 2.42 |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/2004 | 0000 | 09/09/2005 | 2133 |
Subject: | NSA/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were installed. The result of no delay in these measurements results in an error in the measured resistance of the thermistors, Case1 and Dome2 and thus the calculated PIR1 and PIR2 irradiances. The errors are inversely proportial to temperature. Users can apply temperature dependent irradiance corrections shown in the table below. Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 W/m2. The error corrections become the same order of magnitude or larger than the instrument uncertainties at or below 260K or 9F. Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance DIR1 DIR1 DIR2 DIR2 T[F] Tcase[K] Correction[W/m2] Tdome[K] Correction[W/m2] 109.4 316.13 0.00 316.13 0.00 100.5 311.20 -0.15 311.20 0.12 93.2 307.14 -0.12 307.14 0.10 87.0 303.70 -0.10 303.70 0.08 81.6 300.70 -0.17 300.70 0.14 77.0 298.15 -0.22 298.15 0.18 59.4 288.35 -0.34 288.35 0.27 47.4 281.72 -0.23 281.72 0.18 38.5 276.74 -0.42 276.74 0.34 31.3 272.77 -0.48 272.77 0.38 25.4 269.48 -0.61 269.48 0.49 20.3 266.67 -0.67 266.67 0.54 16.0 264.25 -0.82 264.25 0.66 12.1 262.11 -0.98 262.11 0.79 8.7 260.19 -0.97 260.19 0.78 5.6 258.46 -1.07 258.46 0.86 2.7 256.89 -1.17 256.89 0.94 0.1 255.44 -1.33 255.44 1.07 -2.3 254.11 -1.41 254.11 1.13 -4.5 252.87 -1.43 252.87 1.15 -6.6 251.71 -1.52 251.71 1.22 -8.5 250.63 -1.63 250.63 1.31 -10.4 249.62 -1.73 249.62 1.39 -12.2 248.58 -1.79 248.58 1.44 -15.4 246.82 -1.93 246.82 1.55 -18.3 245.23 -2.05 245.23 1.65 -20.9 243.78 -2.22 243.78 1.78 -23.3 242.44 -2.36 242.44 1.89 -25.5 241.21 -2.58 241.21 2.07 -27.5 240.07 -2.65 240.07 2.13 -29.5 239.01 -2.75 239.01 2.21 -31.3 238.00 -3.02 238.00 2.42 |
Measurements: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.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, nsaskyradC1.00, nsaskyrad60sC1.b1 |
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 |
---|---|---|---|
02/15/2006 | 1300 | 02/16/2006 | 1500 |
Subject: | NSA/SKYRAD/C1 - Instrument noise |
DataStreams: | nsaskyrad60sC1.b1, nsaskyrad20sC1.a0 |
Description: | Skyrad data appears affected by noise creating bias in analog voltage readings on 02/15/2006 from 1300-1800GMT and again on 02/16/2006 from 1300-1500GMT. The second night the noise is attenuated significantly. By 02/17 no bias/noise is detectable. The thermistor measurements in PIR1 and PIR2 were unaffected during these excursions and showed no deviation from normal during the problem period. In addition, the onboard logger temperature and battery voltage read normal throughout. The problem has not reappeared as of 4/25/2006. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/04/2004 | 0300 | 12/21/2005 | 1853 |
Subject: | NSA/SKYRAD/C1 - Reprocess: Longwave Calibration error |
DataStreams: | nsaskyrad60sC1.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 are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/2004 | 1630 | 12/21/2005 | 2244 |
Subject: | NSA/SKYRAD/C2 - Reprocess: Longwave Calibration error |
DataStreams: | nsaskyrad60sC2.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 are being reprocessing to remove the calibration bias. Note, this also affected standard deviation, maximum and minimum data fields. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/08/2000 | 0000 | 08/05/2000 | 0000 |
05/08/2001 | 0000 | 08/05/2001 | 0000 |
05/08/2002 | 0000 | 08/05/2002 | 0000 |
05/08/2003 | 0000 | 08/05/2003 | 0000 |
05/08/2004 | 0000 | 08/05/2004 | 0000 |
05/08/2005 | 0000 | 08/05/2005 | 0000 |
05/08/2006 | 0000 | 08/05/2006 | 0000 |
Subject: | NSA/SKYRAD/C2 - Summer solstice shading of radiometers |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP (global hemispheic shortwave measurement) radiometers are shaded by other instruments or support structures. Shading azimuths have been determined for this site. The radiometer mentor suggests not using the data from the NIP and PSP radiometers when the sun is within the following azimuth bounds (typically from May 8th to August 5th of each year): Instr Obstruction AzStart AzEnd NIP rad table 356 17 PSP mfrsr 341 353 Note: There are a number of objects near the NW,N and NE horizon that may affect sunrise data near the summer soltice. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/08/1999 | 0000 | 08/05/1999 | 0000 |
05/08/2000 | 0000 | 08/05/2000 | 0000 |
05/08/2001 | 0000 | 08/05/2001 | 0000 |
05/08/2002 | 0000 | 08/05/2002 | 0000 |
05/08/2003 | 0000 | 08/05/2003 | 0000 |
05/08/2004 | 0000 | 08/05/2004 | 0000 |
05/08/2005 | 0000 | 08/05/2005 | 0000 |
05/08/2006 | 0000 | 08/05/2006 | 0000 |
Subject: | NSA/SKYRAD/C1 - Summer solstice shading of radiometers |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP (global hemispheic shortwave measurement) radiometers are shaded by other instruments or support structures. Shading azimuths have been determined for this site. The radiometer mentor suggests not using the data from the NIP and PSP radiometers when the sun is within the following azimuth bounds (typically from May 8th to August 5th of each year): Instrmt Obstruction AzStart AzEnd NIP rad table 346 358 NIP met tower 13 15 PSP mfrsr 6 16 |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/30/2007 | 1937 | 10/03/2007 | 0300 |
Subject: | NSA/SKYRAD/C1 - Preventive maintenance |
DataStreams: | nsaskyrad60sC1.b1, nsaskyrad20sC1.a0 |
Description: | Preventive maintenance to rebuild ventilator fan and exchange instruments during this time removed Skyrad instruments from operation. Most data collected are not scientifically relevant. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/05/2003 | 0339 | 11/07/2003 | 2234 |
01/03/2004 | 1153 | 01/06/2004 | 0031 |
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 |
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 |
---|---|---|---|
08/27/2008 | 1000 | 08/28/2008 | 0130 |
08/22/2008 | 0930 | 08/22/2008 | 1930 |
08/25/2008 | 0000 | 08/26/2008 | 0100 |
08/18/2008 | 1930 | 08/20/2008 | 2200 |
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: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1998 | 0330 | 06/17/1999 | 2327 |
Subject: | NSA/SKYRAD/C1 - IRT signal bias |
DataStreams: | nsaskyrad60sC1.a1 |
Description: | Additional heat tape that was installed around the IRT appears to have produced a negative bias of about 10 deg (at a sky temperature of -30C). This was corrected when the heat tape was replaced with thermostatically-controlled 75W heaters (that were still insufficient in maintaining the IRT above freezing - D990924.2). |
Measurements: | nsaskyrad60sC1.a1:
|
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: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.b1:
|
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:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/2009 | 2230 | 11/16/2009 | 2250 |
Subject: | NSA/SKYRAD/C2 - IRT Grounding |
DataStreams: | nsaskyrad60sC2.b1 |
Description: | Improper grounding of the IRT caused problems with other radiometer signals. The problem was corrected when the grounding of the data logger was changed. |
Measurements: | nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/2010 | 1500 | 02/09/2010 | 2300 |
01/18/2010 | 0345 | 01/21/2010 | 0030 |
01/24/2010 | 1930 | 01/26/2010 | 0800 |
Subject: | NSA/SKYRAD/C1 - Frosting/Condensation |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | The down_long_hemisp1 varied up to 40 W/m^2 higher than down_long_hemisp2 during the affected time periods. Cold temperatures reported by the IRT suggest the issue is with PIR1. Icing or frost on PIR1 or within the ventilator may be to blame but ops reports can't substantiate this. Data from PIR1 should be avoided during these suspect time periods. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2010 | 2300 | 03/09/2010 | 0336 |
03/14/2010 | 1700 | 03/14/2010 | 1936 |
03/20/2010 | 1630 | 03/20/2010 | 2039 |
Subject: | NSA/SKYRAD/C2 - NIP Frost or Ice |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | Frost or ice likely obstructed the NIP as short_direct_normal values were near zero for the affected time periods. These times correspond to mornings before OPS has the opportunity to clean the instruments. Clear days at Atqusuk are rare and the NIP instrument can very well be ice covered and it won't be apparent in the data. In this case the clear days and overnight icing made the icing issue very apparent. |
Measurements: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2010 | 0900 | 07/10/2010 | 2130 |
07/11/2010 | 0230 | 07/12/2010 | 2315 |
Subject: | NSA/SKYRAD/C2 - Instrument grounding problem |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | The down_long_hemisp1 was often 50 W/m^2 greater than down_long_hemisp2 during the suspect times. Data logger grounding issues were addressed by site ops and have corrected the problem. |
Measurements: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2010 | 0000 | 11/11/2010 | 0800 |
11/14/2010 | 0700 | 11/15/2010 | 0400 |
11/26/2010 | 0300 | 11/26/2010 | 1000 |
12/02/2010 | 0200 | 12/03/2010 | 2359 |
12/11/2010 | 0300 | 12/11/2010 | 1400 |
12/23/2010 | 0000 | 12/23/2010 | 1500 |
12/25/2010 | 0000 | 12/26/2010 | 2030 |
Subject: | NSA/SKYRAD/C2 - Suspect PIR1 |
DataStreams: | nsaskyrad20sC2.a0, nsaskyrad60sC2.b1 |
Description: | PIR1 (down_long_hemisp) data are suspect during these time ranges due to the large differences between PIR1 and PIR2 (i.e. greater than 10W/m2). Maintenance on 12/26 indicated a failed ventilator heater connector on PIR1. After 12/26 PIR1 and PIR2 returned to tracking each other within 10W/m2 as typical. |
Measurements: | nsaskyrad20sC2.a0:
nsaskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/02/2004 | 0000 | 09/02/2004 | 2359 |
Subject: | NSA/QCRAD/C1 - Incorrect value of solar zenith angle |
DataStreams: | nsaqcrad1longC1.c1, nsaqcrad1longC1.s1 |
Description: | A missing lat/lon value in the SKYRAD input file on 8/26/04 led to incorrect calculation of solar zenith angle in the 9/2/04 QCRAD file (QCRAD reads in a week of data at a time and uses lat/lon from the first file). The solar zenith angles in this file are all incorrect. The radiation data are likely fine, but many of the tests on the shortwave fluxes use solar zenith angle and therefore the qc and aqc fields may be incorrect and may incorrectly flag the shortwave flux data. The longwave data should be unaffected. |
Measurements: | nsaqcrad1longC1.s1:
nsaqcrad1longC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/26/2004 | 0000 | 08/26/2004 | 2359 |
Subject: | NSA/SKYRAD/C1 - |
DataStreams: | nsaskyrad60sC1.b1 |
Description: | Values from the lat, lon, and alt fields are incorrectly set to 0. |
Measurements: | nsaskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/20/2011 | 2229 | 07/25/2011 | 1843 |
Subject: | NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficients |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | On 7/20/2011 starting 2229GMT ops replaced the Skyrad shortwave instruments (PSP/8-48/NIP) corresponding to the datastreams (down_short_hemisp, down_short_diffuse_hemisp, short_direct_normal) but the calibration coefficients weren't changed until 07/25/2011 1842GMT. Data were reprocessed and archived in September 2011. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/27/2011 | 1700 | 05/02/2011 | 0100 |
Subject: | NSA/SKYRAD/C1 - Incorrect data during power outage |
DataStreams: | nsaskyrad20sC1.a0, nsaskyrad60sC1.b1 |
Description: | During a power outage the downwelling diffuse 8-48 and the downwelling shortwave direct were incorrect. The IRT was also affected during this time period. |
Measurements: | nsaskyrad60sC1.b1:
nsaskyrad20sC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/02/2011 | 0022 | 09/24/2011 | 0145 |
Subject: | NSA/SKYRAD/C1 - Noisy data due to grounding issue |
DataStreams: | nsaqcrad1longC1.c1, nsaskyrad60sC1.b1 |
Description: | Improper grounding of the IRT serial cable connection caused significant noise in the signals of the other SKYRAD instruments. It was corrected by disconnecting the serial cable from the RocketPort. |
Measurements: | nsaskyrad60sC1.b1:
nsaqcrad1longC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1998 | 0000 | 12/12/1998 | 2359 |
Subject: | NSA/SKYRAD - Barrow SKYRAD PIRD Misconfiguration 12/9 - 12/12/98 |
DataStreams: | nsaskyrad20sC1.a1, nsaskyrad60sC1.a1 |
Description: | The PIRD was incorrectly set from 12/9/98 to 12/12/98 that resulted in an error of approximately 3.7% (was set to 243902 instead of 235294). |
Measurements: | nsaskyrad60sC1.a1:
nsaskyrad20sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/16/1998 | 1900 | 10/28/1998 | 1300 |
Subject: | NSA/SKYRAD/C1 - IRT removed for repair |
DataStreams: | nsaskyrad60sC1.a1, nsaskyradC1.00 |
Description: | The instrument was damaged by internal water condensation caused by the exterior foam insulation used to keep the IRT above freezing. It was returned in July 1998 to the manufacturer for repair. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/1998 | 1800 | 12/03/1998 | 0000 |
Subject: | NSA/SKYRAD/C1 - IRT removed from service |
DataStreams: | nsaskyrad60sC1.a1, nsaskyradC1.00 |
Description: | Instrument was removed to check performance. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/14/1998 | 0130 | 12/21/2000 | 1925 |
Subject: | NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated |
DataStreams: | nsaskyrad60sC1.a1 |
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.a1:
|