DQR ID | Subject | Data Streams Affected |
---|---|---|
D040416.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D050210.1 | TWP/SMET/C3 - Data non-representative | twpsmet60sC3.b1 |
D050418.2 | TWP/SMET/C3 - Instrument logger problem, Sensor failure | twpsmet60sC3.b1 |
D050808.3 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.b1 |
D050831.4 | TWP/SMET/C3 - Towrr lowered for sensor comparisons, data not representative | twpsmet60sC3.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 |
D051115.1 | TWP/SMET/C3 - Upper wind sensor failure | twpsmet60sC3.b1 |
D051117.2 | TWP/SMET/C3 - RH Values Artificially High | twpsmet60sC3.b1 |
D051117.3 | TWP/SMET/C3 - Instrument failure | twpsmet60sC3.b1 |
D051202.3 | TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpskyrad60sC3.b1 |
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 |
D060217.1 | TWP/SKYRAD/C3 - Tracker stopped | twpskyrad60sC3.b1 |
D060223.7 | TWP/SKYRAD/C3 - Solar Tracker locking at solar noon | twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1, twpskyradC3.00 |
D060426.8 | TWP/SMET/C3 - ORG data noisy due to degraded ground | twpsmet60sC3.b1 |
D060502.3 | TWP/SMET/C3 - Reprocess: Windspeed2 calibration error | twpsmet60sC3.b1 |
D060509.1 | TWP/GNDRAD/C3 - IRT failed | twpgndrad60sC3.b1 |
D060627.1 | TWP/SMET/C3 - Anemometer Readings Incorrect | twpsmet60sC3.b1 |
D060630.33 | TWP/SKYRAD/C3 - Reprocess: Longwave Calibration error | twpskyrad60sC3.b1 |
D060630.36 | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error | twpgndrad60sC3.b1 |
D060818.3 | TWP/SMET/C3 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC3.b1 |
D060823.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D061011.4 | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC3.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 |
D070306.2 | TWP/SMET/C3 - Barometer Data Incorrect | twpsmet60sC3.b1 |
D070306.3 | TWP/SMET/C3 - Data Incorrect Due to Water Intrusion | twpsmet60sC3.b1 |
D070803.1 | TWP/SMET/C3 - Upper wind speed artificially slow | twpsmet60sC3.b1 |
D071001.4 | TWP/GNDRAD/C3 - Maintenance activities affected GNDRAD | twpgndrad20sC3.a0, twpgndrad60sC3.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 |
---|---|---|---|
02/09/2005 | 2310 | 02/09/2005 | 2320 |
Subject: | TWP/SMET/C3 - Data non-representative |
DataStreams: | twpsmet60sC3.b1 |
Description: | Tower mast was lowered for inspection. Data during this time is non-representative. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/14/2005 | 0230 | 04/19/2005 | 0050 |
Subject: | TWP/SMET/C3 - Instrument logger problem, Sensor failure |
DataStreams: | twpsmet60sC3.b1 |
Description: | The wind_lower direction sensor failed on 4/14 and disagrees significantly with the wind_upper direction. The wind_lower sensor reports a constant value around 0-15 degrees since it failed. Testing showed that excitation channel two on the logger was the problem. Logger was replaced by spare. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 0030 | 08/05/2005 | 0330 |
Subject: | TWP/SMET/C3 - Data not representative |
DataStreams: | twpsmet60sC3.b1 |
Description: | Tower was lowered for radiometer change and characterization. Wind, temp and RH data not representative of local conditions. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2005 | 0030 | 08/05/2005 | 0330 |
Subject: | TWP/SMET/C3 - Towrr lowered for sensor comparisons, data not representative |
DataStreams: | twpsmet60sC3.b1 |
Description: | The tower was lowered for radiometer change and comparisons. During the time period the data listed was not representative. |
Measurements: | twpsmet60sC3.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 |
---|---|---|---|
11/14/2005 | 0453 | 11/15/2005 | 2215 |
Subject: | TWP/SMET/C3 - Upper wind sensor failure |
DataStreams: | twpsmet60sC3.b1 |
Description: | A lightning strike destroyed the upper (#1) wind sensor. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2005 | 0453 | 11/15/2005 | 0050 |
Subject: | TWP/SMET/C3 - RH Values Artificially High |
DataStreams: | twpsmet60sC3.b1 |
Description: | Lightning strike caused RH readings to be higher than reasonable (130%). |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2005 | 0453 | 11/23/2005 | 0000 |
Subject: | TWP/SMET/C3 - Instrument failure |
DataStreams: | twpsmet60sC3.b1 |
Description: | A lightning strike caused a failure in the ORG. Rainfall was being continually recorded. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/21/2004 | 0000 | 09/09/2005 | 2012 |
Subject: | TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 |
DataStreams: | twpskyrad60sC3.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 as 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. Irradiance 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: | twpskyrad60sC3.b1:
|
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 |
---|---|---|---|
02/16/2006 | 0330 | 02/16/2006 | 0505 |
Subject: | TWP/SKYRAD/C3 - Tracker stopped |
DataStreams: | twpskyrad60sC3.b1 |
Description: | Solar Tracker stopped and had to be repowered |
Measurements: | twpskyrad60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/17/2006 | 0000 | 03/10/2006 | 0411 |
Subject: | TWP/SKYRAD/C3 - Solar Tracker locking at solar noon |
DataStreams: | twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1, twpskyradC3.00 |
Description: | The Scitech solar tracker from SGP that was installed on 2005-12-01 after the previous tracker was damaged by lightning on 2005-11-14 has been hanging up every day at solar noon. In Feb, the sun moved from south to north and the Scitech tracker does not seem to be able to deal with this. During this period the operators power cycled the tracker between 05:00Z and 10:00Z almost every day and data from around solar noon (03:30Z) until the power cycle are unusable for the measurements that use the tracker (NIP, B&W Diffuse, and shaded PIRs). The problem was corrected when the Scitech tracker was replaced by a Brusag tracker on 2006-03-10. |
Measurements: | twpskyradC3.00:
twpskyrad60sC3.b1:
twpskyrad20sC3.a0:
twpskyrad20sC3.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2005 | 0000 | 08/24/2006 | 2359 |
Subject: | TWP/SMET/C3 - ORG data noisy due to degraded ground |
DataStreams: | twpsmet60sC3.b1 |
Description: | SMET Rain Data began to be noisy during December 2005 and the problem slowly became worse over time so that in February 2006 the ORG was reporting with a constant background value of around 0.10 mm/hr rain rate. ORG voltage showed a near constant value above the 85mV threshold. The ground for the ORG had become degraded and was lost due to corrosion. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/27/2006 | 2330 | 05/02/2006 | 0201 |
Subject: | TWP/SMET/C3 - Reprocess: Windspeed2 calibration error |
DataStreams: | twpsmet60sC3.b1 |
Description: | The lower anemometer was replaced afer being removed in anticipation of cyclone Monica. The calibration coefficient was not changed during this period so the wind speeds are a little low (0.2%). |
Measurements: | twpsmet60sC3.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 |
---|---|---|---|
06/27/2006 | 0115 | 06/27/2006 | 0344 |
Subject: | TWP/SMET/C3 - Anemometer Readings Incorrect |
DataStreams: | twpsmet60sC3.b1 |
Description: | The Anemometer readings were incorrect due to the tower being lowered for maintenance. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2004 | 2200 | 12/21/2005 | 2136 |
Subject: | TWP/SKYRAD/C3 - Reprocess: Longwave Calibration error |
DataStreams: | twpskyrad60sC3.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: | twpskyrad60sC3.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 |
---|---|---|---|
12/02/2003 | 0000 | 07/13/2006 | 2219 |
Subject: | TWP/SMET/C3 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC3.b1 |
Description: | Barometric pressure data was converted from hPa to kPa in order to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
Measurements: | twpsmet60sC3.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 |
---|---|---|---|
03/12/2002 | 0000 | 09/26/2006 | 1435 |
Subject: | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC3.b1 |
Description: | A tipping bucket rain gauge was added to the SMET suite of instruments effective 20060926. Two new variables (count and rain amount) were added at the end of the twpsmet60sC1.b1 datastream. When reprocessing of this datastream occurs these variables will be added with -9999 (missing) as the value for dates prior to gauge installation. |
Measurements: | twpsmet60sC3.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 |
---|---|---|---|
03/02/2007 | 1723 | 03/03/2007 | 1228 |
Subject: | TWP/SMET/C3 - Barometer Data Incorrect |
DataStreams: | twpsmet60sC3.b1 |
Description: | The barometer data was incorrect or missing due to water intrusion. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2007 | 0056 | 03/03/2007 | 0123 |
Subject: | TWP/SMET/C3 - Data Incorrect Due to Water Intrusion |
DataStreams: | twpsmet60sC3.b1 |
Description: | Data became erratic and unreasonable after water intrusion into the enclosure. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2007 | 0000 | 09/18/2007 | 2315 |
Subject: | TWP/SMET/C3 - Upper wind speed artificially slow |
DataStreams: | twpsmet60sC3.b1 |
Description: | The upper wind measurement was consistently slower by around 0.5 - 1 m/s than the lower wind measurement. The bearings on the upper wind measurement were binding. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2007 | 2330 | 09/18/2007 | 0722 |
09/18/2007 | 2320 | 09/19/2007 | 0150 |
09/19/2007 | 2333 | 09/20/2007 | 0055 |
Subject: | TWP/GNDRAD/C3 - Maintenance activities affected GNDRAD |
DataStreams: | twpgndrad20sC3.a0, twpgndrad60sC3.b1 |
Description: | While maintenance was performed on the SMET anenometer, the GNDRAD instruments were inverted. Disregard GNDRAD data during this time. |
Measurements: | twpgndrad20sC3.a0:
twpgndrad60sC3.b1:
|