DQR ID | Subject | Data Streams Affected |
---|---|---|
D030306.1 | TWP/SKYRAD/C3 - Reprocess: PIR identified as unshaded is really shaded | twpskyrad60sC3.b1 |
D030821.6 | TWP/SKYRAD/C3 - IRT incorrect min/delta values | twpskyrad60sC3.b1 |
D040416.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D040904.2 | TWP/SKYRAD/C3 - Incorrect NIP cal coefficient | twpskyrad60sC3.b1 |
D050104.1 | TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect | twpskyrad60sC3.b1, twpskyradC3.00 |
D050221.2 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D050221.3 | TWP/GNDRAD/C3 - Reprocess: IRT with wrong calibration | twpgndrad60sC3.b1 |
D050919.4 | TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement | twpgndrad60sC3.b1 |
D051114.3 | TWP/SKYRAD/C3 - tracker inoperative | twpskyrad20sC3.a0, twpskyrad60sC3.b1, twpskyradC3.00 |
D051206.5 | TWP/GNDRAD/C3 - IRT malfunction | twpgndrad60sC3.b1 |
D060110.3 | TWP/SKYRAD/C3 - IRT damaged | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
D060111.1 | TWP/GNDRAD/C3 - IRT power | twpgndrad60sC3.b1 |
D060509.1 | TWP/GNDRAD/C3 - IRT failed | twpgndrad60sC3.b1 |
D060630.36 | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error | twpgndrad60sC3.b1 |
D060823.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D061120.1 | TWP/SKYRAD/C3 - NIP Failure | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
D061214.1 | TWP/SKYRAD/C3 - NIP instrument failure | twpskyrad20sC3.a0, twpskyrad60sC3.b1, twpskyradC3.00 |
D080121.2 | TWP/GNDRAD/C3 - Gndrad shutdown for tropical cylone | twpgndrad20sC3.a0, twpgndrad20sC3.a1, twpgndrad60sC3.b1, twpgndradC3.00 |
D080414.1 | TWP/SKYRAD/C3 - IRT power supply | twpskyrad60sC3.b1 |
D080904.6 | TWP/SKYRAD/C3 - Contamination | twpskyrad60sC3.b1 |
D081222.2 | TWP/SKYRAD/C3 - Direct normal instrument failure | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
D090129.1 | TWP/SKYRAD/C3 - Tracker inoperative | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2002 | 0738 | 06/25/2002 | 2359 |
Subject: | TWP/SKYRAD/C3 - Reprocess: PIR identified as unshaded is really shaded |
DataStreams: | twpskyrad60sC3.b1 |
Description: | From the initial installation of the Darwin SKYRAD suite of instruments, two shaded PIRs were installed rather than one shaded and one unshaded PIR as documented in the netcdf header information. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2002 | 0738 | 03/01/2003 | 2359 |
Subject: | TWP/SKYRAD/C3 - IRT incorrect min/delta values |
DataStreams: | twpskyrad60sC3.b1 |
Description: | For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2004 | 0230 | 04/08/2004 | 1200 |
04/12/2004 | 0600 | 04/27/2004 | 1400 |
05/08/2004 | 0300 | 05/15/2004 | 2200 |
05/27/2004 | 1100 | 06/09/2004 | 0000 |
12/29/2004 | 1100 | 01/06/2005 | 2300 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT behaved erratically, jumping frequently from reporting about 50 Wm^(-2) higher than the PIR for surface irradiance values to about 100Wm^(-2) lower than the PIR. Generally, the IRT measured lower surface temperatures than expected from the PIR. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/24/2004 | 0000 | 09/02/2004 | 2350 |
Subject: | TWP/SKYRAD/C3 - Incorrect NIP cal coefficient |
DataStreams: | twpskyrad60sC3.b1 |
Description: | During our site visit comparison at Darwin we observed that the skyrad NIP was reading about 50 w/m2 lower than the comparison cavity radfiometer and the replacement NIP on the comparison stand. We found that the calibration coefficient for the NIP (responsivity at 45o)was put in as 8.64X10-6. The NIP was new and had not been calibrated at SGP. The factory number was 8.04X10-6. We corrected the calibration coefficient and the instruments agreed to better than 5 w/m2. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2004 | 0000 | 09/02/2004 | 0400 |
Subject: | TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect |
DataStreams: | twpskyrad60sC3.b1, twpskyradC3.00 |
Description: | On 05/20 during installtion of the new Campbell datalogger system and associated program the NIP (S/N 33551E6) was assigned an incorrect calibration coefficient. A coefficient of 116.01 W/m2/mV was applied when it should have been 124.378 W/m2/mV. TWP reports SV0405D and SV0409D detail the activities which lead to this DQR. |
Measurements: | twpskyradC3.00:
twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/10/2004 | 0700 | 12/25/2004 | 0300 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT measured higher surface temperatures than expected from the PIR, even at night. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/17/2004 | 0000 | 11/19/2004 | 0105 |
Subject: | TWP/GNDRAD/C3 - Reprocess: IRT with wrong calibration |
DataStreams: | twpgndrad60sC3.b1 |
Description: | A spare IRT was installed that was not configured properly. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 0030 | 08/05/2005 | 0200 |
08/09/2005 | 0000 | 08/09/2005 | 0200 |
Subject: | TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The tower at Darwin was brought down to test and replace the Gndrad PIR on 8/5/2005 and the PSP on 8/9/2005 |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2005 | 0453 | 12/02/2005 | 0000 |
Subject: | TWP/SKYRAD/C3 - tracker inoperative |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1, twpskyradC3.00 |
Description: | A lightning strike at Darwin removed the tracker from service. Instruments installed on the tracker were rendered either inoperative or were not shaded during this time period. The longwave hemispheric instruments PIR1 and PIR2 appear to have been unaffected. They are not suseptable to incorrect tracker operation. The downwelling hemispheric shortwave PSP instrument mounted on Skyrad will not be affected by incorrect tracker operation. |
Measurements: | twpskyradC3.00:
twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2005 | 1500 | 12/05/2005 | 0100 |
Subject: | TWP/GNDRAD/C3 - IRT malfunction |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The internal IRT power supply failed (probably due to a lightning strike on 11/14) and was drawing excessive current on the data logger's DC system. The problem was corrected by replacing the instrument with a spare. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2005 | 2314 | 03/07/2006 | 0257 |
Subject: | TWP/SKYRAD/C3 - IRT damaged |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
Description: | The analog output of the IRT was damaged by a lightning strike. The problem was corrected by replacing the instrument with a spare. The damaged IRT was returned to the vendor for repair. |
Measurements: | twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/20/2005 | 2330 | 01/02/2006 | 2300 |
Subject: | TWP/GNDRAD/C3 - IRT power |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT failed to report after a planned power outage to add lightning protection modules to the AC power wiring. The problem was corrected when a loose power connection to the logger was found, rectified, and power restored to the logger. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/07/2006 | 0000 | 05/18/2006 | 2359 |
Subject: | TWP/GNDRAD/C3 - IRT failed |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT began to fail on 4/7/2006 and failed completely (apparently due to the internal power supply) on 4/27. It was replaced on 5/18. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2004 | 0100 | 12/21/2005 | 2137 |
Subject: | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC3.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: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2006 | 0000 | 06/27/2006 | 0344 |
Subject: | TWP/GNDRAD/C3 - IRT bias |
DataStreams: | twpgndrad60sC3.b1 |
Description: | The IRT reported higher surface temperatures than the PIR due to corrosion on the terminals of the lightning protection module and a ground wire error. The corrosion was cleaned and the wiring corrected. |
Measurements: | twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/2006 | 2006 | 11/20/2006 | 0630 |
Subject: | TWP/SKYRAD/C3 - NIP Failure |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
Description: | Skyrad normal incident shortwave irradiance (NIP) started reporting impossible values for direct normal irradiance starting 16 November approx 2100GMT corresponding to a rain event at the same time. The NIP was replaced fixing the problem. Direct normal data are not recoverable. However, the NIP data can be calculated from the global hemsipherical shortwave and global hemispherical diffuse datastreams by using the following relationship: Global Horizontal = Direct Normal x cos(Z) + Diffuse Horizontal where Z is the zenith angle. |
Measurements: | twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/2006 | 0342 | 01/16/2007 | 0440 |
Subject: | TWP/SKYRAD/C3 - NIP instrument failure |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1, twpskyradC3.00 |
Description: | The NIP (Short Direct Normal) was replaced after it displayed symptoms of failure associated with either unknown precipitation related issues or a possible lightning strike. NIP data are not recoverable. Direct normal data can be reconstructed from global hemispheric and global diffuse data using the following relationship: global hemispheric = direct*cos(sza) + diffuse hemispheric |
Measurements: | twpskyradC3.00:
twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/03/2008 | 1000 | 01/07/2008 | 0515 |
Subject: | TWP/GNDRAD/C3 - Gndrad shutdown for tropical cylone |
DataStreams: | twpgndrad20sC3.a0, twpgndrad20sC3.a1, twpgndrad60sC3.b1, twpgndradC3.00 |
Description: | On Jan 3rd approximately 1000GMT the effects of a tropical cyclone started affecting the installed radiometer measurements at ARM/TWP/C3(Darwin) - both Skyrad and Gndrad. On Jan 4th 0740 GMT the Gndrad station was shutdown to avoid damage due to the close passing of this storm. Station was restarted Jan 7th 0515GMT. |
Measurements: | twpgndradC3.00:
twpgndrad20sC3.a1:
twpgndrad20sC3.a0:
twpgndrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/11/2008 | 1901 | 04/14/2008 | 2205 |
Subject: | TWP/SKYRAD/C3 - IRT power supply |
DataStreams: | twpskyrad60sC3.b1 |
Description: | The 12-to-24V DC converter the provides power to the IRT had shut down and was restarted by power-cycling. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/08/2008 | 0000 | 09/05/2008 | 0053 |
Subject: | TWP/SKYRAD/C3 - Contamination |
DataStreams: | twpskyrad60sC3.b1 |
Description: | The IRT exhibited a positive bias compared to AERI. The problem was corrected when the lens and mirror were cleaned. |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/14/2008 | 0457 | 12/30/2008 | 0040 |
Subject: | TWP/SKYRAD/C3 - Direct normal instrument failure |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
Description: | The NIP instrument (short_direct_normal data stream) failed giving bad data during this time period. The failure start time coincides with a reported DC power failure but no connection between the reported power failure and the failure of this instrument could be determined. Ops also reported the tracker clock running 2.9 minutes slow during maintenance on 12/22 0300GMT (see CS-2008-0714). Again, the slow clock is not suspect and did not appear to affect alignment. Ops replaced the NIP instrument on 12/30 and short_direct_normal data resumed normal operation. Disregard the short_direct_normal (NIP) data during this time period or calculate using the global and diffuse instruments and the following relationship: short_direct_normal = ((down_short_hemisp - down_short_diffuse_hemisp))/cos(zenith angle) |
Measurements: | twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/23/2009 | 2100 | 01/27/2009 | 0715 |
Subject: | TWP/SKYRAD/C3 - Tracker inoperative |
DataStreams: | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
Description: | The tracker at Darwin failed 01/23. The tracker was power cycled on 01/27 and it returned to normal operation. The affected data streams are short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48). The down_short_hemisp are not affected. The down_long_hemisp1 and 2 (PIR1 and PIR2) should not be affected but direct sun can affect individual instrument performance. |
Measurements: | twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
|