DQR ID | Subject | Data Streams Affected |
---|---|---|
D021111.11 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.15 | NSA/SKYRAD/C1 - Corrupted Shaded PIR data | nsaskyrad60sC1.a1 |
D021111.16 | NSA/SKYRAD/C1 - Shaded PIR data unreasonable | nsaskyrad60sC1.a1 |
D021111.19 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.2 | NSA/SKYRAD/C1 - Corrupted Unshaded PIR data | nsaskyrad60sC1.a1 |
D021111.21 | NSA/SKYRAD/C1 - Shaded PIR data suspect | nsaskyrad60sC1.a1 |
D021111.22 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1 |
D021111.3 | NSA/SKYRAD/C1 - Spikes in Unshaded PIR data | nsaskyrad60sC1.a1 |
D021111.5 | NSA/SKYRAD/C1 - Unshaded PIR data incorrect | nsaskyrad60sC1.a1 |
D021211.11 | NSA/GNDRAD/C1 - Noisy PIR Data | nsagndrad60sC1.a1 |
D021211.13 | NSA/GNDRAD/C1 - PIR1 Calibration problems resulted in small error | nsagndrad60sC1.a1 |
D021211.9 | NSA/GNDRAD/C1 - Instrument maintenance | nsagndrad60sC1.a1 |
D021213.1 | NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight | nsaskyrad60sC1.a1 |
D021213.3 | NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight | nsaskyrad60sC1.a1 |
D030510.2 | NSA/SKYRAD/C1 - IRT measurements during precipitation events | nsaskyrad60sC1.a1 |
D080725.1 | NSA/GNDRAD/C1 - IRT not connected | nsagndrad60sC1.a1 |
D080728.1 | NSA/GNDRAD/C1 - IRT incorrect | nsagndrad60sC1.a1 |
D080729.2 | NSA/GNDRAD/C1 - IRT scale factor | nsagndrad60sC1.a1 |
D080825.1 | NSA/SKYRAD/C1 - IRT signal bias | nsaskyrad60sC1.a1 |
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 | nsaskyradC1.00, nsaskyrad60sC1.a1 |
D990108.5 | NSA/SKYRAD/C1 - IRT removed from service | nsaskyradC1.00, nsaskyrad60sC1.a1 |
D990924.1 | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated | nsagndrad60sC1.a1 |
D990924.2 | NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated | 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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
09/01/1998 | 0000 | 02/28/1999 | 2359 |
Subject: | NSA/GNDRAD/C1 - Noisy PIR Data |
DataStreams: | nsagndrad60sC1.a1 |
Description: | During the period referenced, the ground PIR was noisy in comparison to the sky PIR data. At the end of November, the noise increased to roughly 10 W/m2 from peak to peak. After 12/23/98, the noise decreased in amplitude but still had noisy patterns. On 01/17-18/99, there was an increase again in the noise level (4 GMT 01/17 - 5 GMT 01/18). During this period the gndrad IRT data also exhibited noise patterns (the IRT was not operational). In February, the instrument exhibited large noise variations again. On 02/16, a wiring problem was corrected and the noise dropped back to 1-5 W/m2. However, the noise levels began to increase again. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/08/1998 | 2051 | 12/15/1998 | 1200 |
Subject: | NSA/GNDRAD/C1 - PIR1 Calibration problems resulted in small error |
DataStreams: | nsagndrad60sC1.a1 |
Description: | The dome correction coefficients were not properly reset in calibration file until the early morning of 12/15. These errors probably account for less than 4% in error. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/08/1998 | 2030 | 12/08/1998 | 2050 |
Subject: | NSA/GNDRAD/C1 - Instrument maintenance |
DataStreams: | nsagndrad60sC1.a1 |
Description: | Instrument replaced. Data affected by the work done during this time. |
Measurements: | nsagndrad60sC1.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 |
---|---|---|---|
05/01/1998 | 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 |
---|---|---|---|
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 |
---|---|---|---|
12/10/1998 | 2200 | 01/20/1999 | 0059 |
Subject: | NSA/GNDRAD/C1 - IRT not connected |
DataStreams: | nsagndrad60sC1.a1 |
Description: | The IRT was unplugged from the Zeno data logger on 12/10/1998 for a interference test and when it was plugged back in on 12/22, the connector at the data logger was damaged. The data logger and connecter were replaced on 1/20/1999. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/1998 | 0000 | 05/13/1998 | 2152 |
Subject: | NSA/GNDRAD/C1 - IRT incorrect |
DataStreams: | nsagndrad60sC1.a1 |
Description: | The IRT data were very noisy and unrepresentative. |
Measurements: | nsagndrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/13/1998 | 2152 | 06/04/1998 | 2208 |
Subject: | NSA/GNDRAD/C1 - IRT scale factor |
DataStreams: | nsagndrad60sC1.a1 |
Description: | The IRT scale factors in the data logger were incorrectly set to m = 100 degC/V, b = -60 degC. They were corrected to 25 degC/V and -50 degC. |
Measurements: | nsagndrad60sC1.a1:
|
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 |
---|---|---|---|
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: | nsaskyradC1.00, nsaskyrad60sC1.a1 |
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: | nsaskyradC1.00, nsaskyrad60sC1.a1 |
Description: | Instrument was removed to check performance. |
Measurements: | nsaskyradC1.00:
nsaskyrad60sC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/1998 | 2156 | 12/22/2000 | 2020 |
Subject: | NSA/GNDRAD/C1 - Reprocess: IRT insufficiently heated |
DataStreams: | nsagndrad60sC1.a1 |
Description: | IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of surface 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_up_long_hemisp_dome_temp or inst_up_long_dome_temp) |
Measurements: | nsagndrad60sC1.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:
|