DQR ID | Subject | Data Streams Affected |
---|---|---|
D040416.1 | TWP/GNDRAD/C3 - IRT bias | twpgndrad60sC3.b1 |
D040428.1 | TWP/SMET/C1 - Poor Performing Sensor | twpsmet60sC1.b1 |
D050105.1 | TWP/SONDE/C1 - Bad RH at beginning of sounding | twpsondewnpnC1.b1 |
D050201.2 | TWP/SONDE/C1 - Bad RH at beginning of sounding | twpsondewnpnC1.b1 |
D050210.1 | TWP/SMET/C3 - Data non-representative | twpsmet60sC3.b1 |
D050219.2 | TWP/SKYRAD/C2 - IRT bias | twpskyrad60sC2.b1 |
D050301.1 | TWP/SMET/C2 - Instrument failure | twpsmet60sC2.b1 |
D050322.2 | TWP/SMET/C2 - Upper wind sensor failure | twpsmet60sC2.b1 |
D050418.2 | TWP/SMET/C3 - Instrument logger problem, Sensor failure | twpsmet60sC3.b1 |
D050504.2 | TWP/GNDRAD/C2 - IRT connector | twpgndrad60sC2.b1 |
D050714.1 | TWP/SMET/C2 - RH failure | twpsmet60sC2.b1 |
D050714.3 | TWP/SKYRAD/C1 - Apparent logger problem | twpskyradC1.00, twpskyrad20sC1.a1, twpskyrad60sC1.b1, twpskyrad1duttC1.c1, twp1swfanalskyrad1longC1.c1, twp15swfanalskyrad1longC1.c1 |
D050808.3 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.b1 |
D050815.1 | TWP/GNDRAD/C2 - IRT power supply failed | twpgndradC2.00, twpgndrad60sC2.b1 |
D050831.4 | TWP/SMET/C3 - Towrr lowered for sensor comparisons, data not representative | twpsmet60sC3.b1 |
D050913.3 | TWP/SONDE/C2 - Bad RH sensor | twpsondewnpnC2.b1 |
D050919.4 | TWP/GNDRAD/C3 - Tower inverted for instrument testing and replacement | twpgndrad60sC3.b1 |
D050920.4 | TWP/SMET/C2 - Instrument maintenance | twpsmet60sC2.b1 |
D050921.2 | TWP/SMET/C2 - ORG data incorrect | twpsmet60sC2.b1 |
D050926.6 | TWP/GNDRAD/C2 - Gndrad inverted for radiometer | twpgndrad60sC2.b1 |
D051005.6 | TWP/SMET/C2 - Tower down for calibration activities | twpsmet60sC2.b1 |
D051114.3 | TWP/SKYRAD/C3 - tracker inoperative | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
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 |
D051119.1 | TWP/SKYRAD/C1 - IRT failure | twpskyrad60sC1.b1 |
D051122.2 | TWP/SONDE/C2 - Broken temperature sensor | twpsondewnpnC2.b1 |
D051123.2 | TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometers | twpgndrad60sC1.b1 |
D051202.3 | TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpskyrad60sC3.b1 |
D051202.5 | TWP/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpskyrad20sC1.a0, twpskyrad60sC1.b1 |
D051202.6 | TWP/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 downwelling longwave | twpskyrad20sC2.a0, twpskyrad60sC2.b1 |
D051206.5 | TWP/GNDRAD/C3 - IRT malfunction | twpgndrad60sC3.b1 |
D051219.2 | TWP/SONDE/C2 - Broken temperature sensor | twpsondewnpnC2.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 | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1 |
D060308.1 | TWP/SONDE/C2 - Broken temperature sensor | twpsondewnpnC2.b1 |
D060403.2 | TWP/SONDE/C2 - Broken temperature sensor | twpsondewnpnC2.b1 |
D060418.1 | TWP/SONDE/C2 - Bad RH in lower 8km | twpsondewnpnC2.b1 |
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 |
D060522.1 | TWP/SMET/C1 - Upper wind speed sensor failure | twpsmet60sC1.b1 |
D060614.2 | TWP/SMET/C2 - Temp/RH probe failure | twpsmet60sC2.b1 |
D060627.1 | TWP/SMET/C3 - Anemometer Readings Incorrect | twpsmet60sC3.b1 |
D060630.31 | TWP/SKYRAD/C1 - Reprocess: Longwave Calibration error | twpskyrad60sC1.b1 |
D060630.32 | TWP/SKYRAD/C2 - Reprocess: Longwave Calibration error | twpskyrad60sC2.b1 |
D060630.33 | TWP/SKYRAD/C3 - Reprocess: Longwave Calibration error | twpskyrad60sC3.b1 |
D060630.34 | TWP/GNDRAD/C1 - Reprocess: Longwave Calibration error | twpgndrad60sC1.b1 |
D060630.35 | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error | twpgndrad60sC2.b1 |
D060630.36 | TWP/GNDRAD/C3 - Reprocess: Longwave Calibration error | twpgndrad60sC3.b1 |
D060804.1 | TWP/SKYRAD/C2 - IRT signal loss | twpskyrad60sC2.b1 |
D060817.3 | TWP/SMET/C1 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC1.b1 |
D060818.2 | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC2.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 |
D061011.2 | TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC1.b1 |
D061011.3 | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC2.b1 |
D061011.4 | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC3.b1 |
D061016.1 | TWP/SKYRAD/C2 - IRT signal | twpskyrad60sC2.b1 |
D061120.1 | TWP/SKYRAD/C3 - NIP Failure | twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
D061214.1 | TWP/SKYRAD/C3 - NIP instrument failure | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
D070110.1 | TWP/GNDRAD/C2 - IRT signal | twpgndrad60sC2.b1 |
D070404.2 | TWP/SKYRAD/C2 - IRT calibration | twpskyrad60sC2.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 |
---|---|---|---|
04/23/2004 | 0000 | 01/19/2005 | 1530 |
Subject: | TWP/SMET/C1 - Poor Performing Sensor |
DataStreams: | twpsmet60sC1.b1 |
Description: | On 4/23/2004 condensation was found inside the target area of the ORG lens. A spare was sent and installed but did not solve the problem of high background voltage values causing rainrate values to be recorded during no rainfall. Values range anywhere from 0.06 to 0.12 mm/hr. A new Optical Rain Gage was installed on 01/19/2005 @ 13:30 GMT alleviating the high background voltage values that lead to consistent rainfall rates of around 0.11 to 0.15 mm/hr on a consistent basis. The formula used to calculate rainfall rates from the new Optical Rain Gage is: RR (mm/hr) = 25(V^1.87) - 0.15. Older model formula = 20(V^2) - 0.05 The two formulas result in comparable data. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/30/2004 | 2330 | 12/31/2004 | 0108 |
Subject: | TWP/SONDE/C1 - Bad RH at beginning of sounding |
DataStreams: | twpsondewnpnC1.b1 |
Description: | It appears that the RH sensor heating circuit failed during this portion of the sounding (approximately between 0km and 11km). The RH oscillates rapidly between low (~5 %RH) and not so low (~70 %RH) and the oscillation seems to stop when the temperature is below ~40 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/2005 | 2330 | 01/08/2005 | 0102 |
Subject: | TWP/SONDE/C1 - Bad RH at beginning of sounding |
DataStreams: | twpsondewnpnC1.b1 |
Description: | It appears that the RH sensor heating circuit failed during this portion of the sounding (approximately between 0km and 12km). The RH oscillates rapidly between low (~2 %RH) and not so low (~80 %RH) and the oscillation seems to stop when the temperature is below ~40 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC1.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 |
---|---|---|---|
02/07/2005 | 0454 | 04/17/2005 | 2023 |
Subject: | TWP/SKYRAD/C2 - IRT bias |
DataStreams: | twpskyrad60sC2.b1 |
Description: | The IRT was measuring higher sky temperatures than AERI. The problem was corrected by changing the mirror. |
Measurements: | twpskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/12/2005 | 1955 | 03/03/2005 | 0430 |
Subject: | TWP/SMET/C2 - Instrument failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Upper wind sensor failed. Wind direction was reported at a near constant value of 69 degrees and was significantly different than the lower wind sensor's direction values. Sensor replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/2005 | 2300 | 04/17/2005 | 0332 |
Subject: | TWP/SMET/C2 - Upper wind sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | After replacement on 03/03/2005 the upper wind sensor began reporting erroneous values again on 03/09/2005 becoming very apparent after 03/17/2005. Wind speed data appears reasonable but the wind direction data do not agree well with the lower wind sensor. |
Measurements: | twpsmet60sC2.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 |
---|---|---|---|
03/27/2005 | 2330 | 04/03/2005 | 0240 |
Subject: | TWP/GNDRAD/C2 - IRT connector |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The IRT had a problem with the connector of either the signal or power cable which produced an output of 0 volts equivalent to a measurement of 223K. The problem was corrected when the connectors were cleaned and tightened. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2005 | 1900 | 07/14/2005 | 2226 |
Subject: | TWP/SMET/C2 - RH failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | The RH values were frequently over MAX value of 104% starting on 7/10/2005 through end of period. Sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/13/2005 | 0620 | 07/15/2005 | 1900 |
Subject: | TWP/SKYRAD/C1 - Apparent logger problem |
DataStreams: | twpskyradC1.00, twpskyrad20sC1.a1, twpskyrad60sC1.b1, twpskyrad1duttC1.c1, twp1swfanalskyrad1longC1.c1, twp15swfanalskyrad1longC1.c1 |
Description: | Beginning at 0620Z on 13 July, all Manus SKYRAD measurements deviated wildly from expected values. The longwave fluxes climbed to well over the expected maximum of 500 W/m^2 to values over 1000 W/m^2. At the same time, shortwave flux components developed large inconsistancies and night-time offsets. Values had somewhat returned to normal ranges by 2200Z on 14 July but again developed internal inconsistancies between 0430 and 1900Z on 15 July. The instruments appeared to be working normally once again as of 1900Z on 15 July. It is not known what caused this period of faulty values but it is thought that an electrical surge - perhaps from a lightning storm (though none was reported) may have caused the temporary problems. |
Measurements: | twpskyrad1duttC1.c1:
twp15swfanalskyrad1longC1.c1:
twp1swfanalskyrad1longC1.c1:
twpskyrad20sC1.a1:
twpskyrad60sC1.b1:
twpskyradC1.00:
|
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 |
---|---|---|---|
08/11/2005 | 1648 | 08/16/2005 | 2230 |
Subject: | TWP/GNDRAD/C2 - IRT power supply failed |
DataStreams: | twpgndradC2.00, twpgndrad60sC2.b1 |
Description: | The IRT output dropped to its minimum output of 223 K (0 volts). It was determined the 24 V DC converter had failed. The converter was replaced on 16 August and the instrument began reporting normally again. The IRT data are unusable during the five day period when the DC converter was faulty. The GNDRAD (down-looking) IRT is used primarily for surface temperature. The PIR can be used for this purpose by inverting the IR flux equation, Flux = sigma*temperature^4 where sigma = 5.67x10-8 W/m^2K^4. But, unlike the IRT, the PIR measurement is strongly effected by the air temperature in addition to the surface temperature. At night, when the air temperature approaches the surface temperature, the PIR provides a good estimate of the surface temperature. During the day, however, the PIR tends to underestimate the ground temperature, particularly on sunny days. The magnitude of the underestimate can be estimated by evaluating periods when both instruments are operating but is typically on the order of 5-10C. |
Measurements: | twpgndradC2.00:
twpgndrad60sC2.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 |
---|---|---|---|
07/03/2005 | 2350 | 07/04/2005 | 0024 |
07/10/2005 | 2340 | 07/11/2005 | 0021 |
07/19/2005 | 2332 | 07/20/2005 | 0016 |
Subject: | TWP/SONDE/C2 - Bad RH sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below -50 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.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 |
---|---|---|---|
09/21/2005 | 1625 | 09/21/2005 | 1815 |
Subject: | TWP/SMET/C2 - Instrument maintenance |
DataStreams: | twpsmet60sC2.b1 |
Description: | Instrument calibration and testing were taking place for brief periods. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2005 | 0809 | 09/19/2005 | 1902 |
Subject: | TWP/SMET/C2 - ORG data incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Data from the ORG was incorrect due to heavy condensation on the lens. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2005 | 0152 | 09/23/2005 | 0115 |
Subject: | TWP/GNDRAD/C2 - Gndrad inverted for radiometer |
DataStreams: | twpgndrad60sC2.b1 |
Description: | Gndrad instruments PIR and PSP inverted for replacement instrument installation and comparison |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2005 | 0200 | 09/19/2005 | 0330 |
Subject: | TWP/SMET/C2 - Tower down for calibration activities |
DataStreams: | twpsmet60sC2.b1 |
Description: | Tower lowered, wind vanes spun at different frequencies, and ORG tested with electronic rain. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/14/2005 | 0453 | 12/02/2005 | 0000 |
Subject: | TWP/SKYRAD/C3 - tracker inoperative |
DataStreams: | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
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 |
---|---|---|---|
11/13/2005 | 0100 | 01/10/2006 | 0145 |
Subject: | TWP/SKYRAD/C1 - IRT failure |
DataStreams: | twpskyrad60sC1.b1 |
Description: | A moisture related fault was found in the IRT cable after a day of very heavy rain. The cable was replaced but the internal power supply was apparently damaged. The instrument was replaced with a spare IRT. |
Measurements: | twpskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/19/2005 | 2334 | 11/20/2005 | 0153 |
11/21/2005 | 2332 | 11/22/2005 | 0140 |
Subject: | TWP/SONDE/C2 - Broken temperature sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All the temperature-related data are incorrect. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/11/2005 | 2230 | 11/17/2005 | 0030 |
Subject: | TWP/GNDRAD/C1 - Gndrad inverted for comparison of radiometers |
DataStreams: | twpgndrad60sC1.b1 |
Description: | Radiometers GNDRAD PIR and PSP inverted for radiometer comparison |
Measurements: | twpgndrad60sC1.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 |
---|---|---|---|
08/02/2004 | 0200 | 09/09/2005 | 2022 |
Subject: | TWP/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 |
DataStreams: | twpskyrad20sC1.a0, twpskyrad60sC1.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 absolute value of 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. 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: | twpskyrad20sC1.a0:
twpskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 2200 | 09/09/2005 | 2058 |
Subject: | TWP/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 |
DataStreams: | twpskyrad20sC2.a0, twpskyrad60sC2.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 absolute value of 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. 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: | twpskyrad60sC2.b1:
twpskyrad20sC2.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 |
---|---|---|---|
12/07/2005 | 1153 | 12/07/2005 | 1323 |
Subject: | TWP/SONDE/C2 - Broken temperature sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All the temperature-related data are incorrect. |
Measurements: | twpsondewnpnC2.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: | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad20sC3.a1, twpskyrad60sC3.b1 |
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 |
---|---|---|---|
01/15/2006 | 1144 | 01/15/2006 | 1328 |
01/19/2006 | 1318 | 01/19/2006 | 1320 |
01/22/2006 | 1149 | 01/22/2006 | 1315 |
02/14/2006 | 0055 | 02/14/2006 | 0207 |
02/21/2006 | 0232 | 02/21/2006 | 0359 |
Subject: | TWP/SONDE/C2 - Broken temperature sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All the temperature-related data are incorrect. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/27/2006 | 0043 | 03/27/2006 | 0208 |
Subject: | TWP/SONDE/C2 - Broken temperature sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All the temperature-related data are incorrect. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/10/2006 | 0247 | 04/10/2006 | 0314 |
Subject: | TWP/SONDE/C2 - Bad RH in lower 8km |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below ~35 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.b1:
|
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 |
---|---|---|---|
05/09/2006 | 0000 | 10/14/2006 | 0237 |
Subject: | TWP/SMET/C1 - Upper wind speed sensor failure |
DataStreams: | twpsmet60sC1.b1 |
Description: | The upper wind speed sensor was binding at low wind speeds. Comparison to the lower wind sensor showed that the upper sensor flat-lines for long periods of time. The upper anemometer was replaced. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/05/2006 | 2144 | 06/15/2006 | 0427 |
Subject: | TWP/SMET/C2 - Temp/RH probe failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Temperature/RH probe failed and was replaced. |
Measurements: | twpsmet60sC2.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 |
---|---|---|---|
08/02/2004 | 0200 | 12/21/2005 | 2205 |
Subject: | TWP/SKYRAD/C1 - Reprocess: Longwave Calibration error |
DataStreams: | twpskyrad60sC1.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: | twpskyrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 0500 | 12/21/2005 | 2150 |
Subject: | TWP/SKYRAD/C2 - Reprocess: Longwave Calibration error |
DataStreams: | twpskyrad60sC2.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: | twpskyrad60sC2.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 |
---|---|---|---|
08/02/2004 | 0700 | 12/21/2005 | 2204 |
Subject: | TWP/GNDRAD/C1 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC1.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: | twpgndrad60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 2202 | 12/21/2005 | 2149 |
Subject: | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error |
DataStreams: | twpgndrad60sC2.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: | twpgndrad60sC2.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 |
---|---|---|---|
07/19/2006 | 2239 | 07/24/2006 | 0727 |
Subject: | TWP/SKYRAD/C2 - IRT signal loss |
DataStreams: | twpskyrad60sC2.b1 |
Description: | There was a significant drop in logger voltage that corresponds with a loss of the IR temperature. This was possibly due to a loose connection. |
Measurements: | twpskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/1996 | 0000 | 07/13/2006 | 2225 |
Subject: | TWP/SMET/C1 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC1.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: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0000 | 07/13/2006 | 2232 |
Subject: | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa |
DataStreams: | twpsmet60sC2.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: | twpsmet60sC2.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 |
---|---|---|---|
10/09/1996 | 0000 | 09/26/2006 | 1438 |
10/09/1996 | 0000 | 10/17/2006 | 0000 |
Subject: | TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC1.b1 |
Description: | A tipping bucket rain gauge was added to the TWP.C1 SMET suite of instruments on 20061017. Effective 20060926, two new variables (count and rain amount) were added to the end of the twpsmet60sC1.b1 datastream. Between 9/26 and 10/17, the data for these two variables are filled with zeros. Users should not use the data during this period as the zeros are not representative of the rain fall at the site. When reprocessing of this datastream occurs these variables will be added for the 19961009-20060926 and data from 19961009-20061017 will be filled with -9999 (missing). |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0000 | 09/26/2006 | 1400 |
10/21/1998 | 0000 | 11/29/2006 | 2014 |
Subject: | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added |
DataStreams: | twpsmet60sC2.b1 |
Description: | A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. Effective 20060926, two new variables (count and rain amount) were added to the end of the twpsmet60sC2.b1 datastream. Between 9/26 and 11/29, the data for these two variables are filled with zeros. Users should not use the data during this period as the zeros are not representative of the rain fall at the site. When reprocessing of this datastream occurs these variables will be added for the 19981021-20060926 and data from 19981021-20061129 will be filled with -9999 (missing). |
Measurements: | twpsmet60sC2.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 |
---|---|---|---|
10/13/2006 | 0135 | 12/04/2006 | 2120 |
Subject: | TWP/SKYRAD/C2 - IRT signal |
DataStreams: | twpskyrad60sC2.b1 |
Description: | The IRT exhibited a bias of the analog voltage output that caused problems with the signals from the other SKYRAD radiometers. The bias was due to corrosion between the power and signal connections in the IRT cable. The IRT was disconnected on 10/18/2006 at 01:20 and replaced on 11/6/2006 at 23:00 but it too appeared to have grounding problems due to internal corrosion and was disconnected on 11/11/2006 at 11:42 and then intermittently reconnected for testing. A second spare was installed on 12/4/2006 which did not cause problems with the signals from the other instruments. |
Measurements: | twpskyrad60sC2.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: | twpskyradC3.00, twpskyrad20sC3.a0, twpskyrad60sC3.b1 |
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 |
---|---|---|---|
12/03/2006 | 0400 | 02/04/2007 | 2316 |
Subject: | TWP/GNDRAD/C2 - IRT signal |
DataStreams: | twpgndrad60sC2.b1 |
Description: | When the other GNDRAD radiometers were replaced on 12/3/2006, the quality of the IRT signal began to degrade until 12/26 when it became unusable. The instrument was replaced on 2/4/2007. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/04/2006 | 2120 | 02/22/2007 | 0125 |
Subject: | TWP/SKYRAD/C2 - IRT calibration |
DataStreams: | twpskyrad60sC2.b1 |
Description: | The IRT was not properly calibrated and was not able to measure sky temperatures below 273.2 K. (This instrument was the same one damaged by lightning in November 2005 in Darwin. It was returned for repair and received a new lens but was calibrated only down to 0 deg C, so the problem was neither detected nor repaired.) The IRT was replaced on 2/22/2007. |
Measurements: | twpskyrad60sC2.b1:
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