DQR ID | Subject | Data Streams Affected |
---|---|---|
D011207.1 | TWP/SKYRAD/C2 - Solar tracker failure | twpskyrad20sC2.a1, twpskyrad60sC2.a1, twpskyrad60sC2.b1 |
D020814.2 | TWP/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded | twpskyrad60sC2.b1 |
D030501.5 | TWP/SMET/C2 - Upper wind sensor failed | twpsmet60sC2.b1 |
D030730.1 | TWP/GNDRAD/C2 - IRT problem | twpgndrad60sC2.b1 |
D030821.5 | TWP/SKYRAD/C2 - IRT incorrect min/delta values | twpskyrad60sC2.b1 |
D040421.1 | TWP/SMET/C2 - Lower wind sensor failure | twpsmet60sC2.b1 |
D040722.7 | TWP/SMET/C2 - connection and timing issues with new logger | twpsmet60sC2.b1 |
D040726.1 | TWP/SMET/C2 - Negative rainfall rates | twpsmet60sC2.b1 |
D040824.2 | TWP/SMET/C2 - Incorrect rainrate equation used. | twpsmet60sC2.b1 |
D041015.3 | TWP/GNDRAD/C2 - incorrect IRT calibration | twpgndrad60sC2.b1 |
D041026.2 | TWP/SKYRAD/C2 - IRT bias | twpskyrad60sC2.b1 |
D050219.2 | TWP/SKYRAD/C2 - IRT bias | twpskyrad60sC2.b1 |
D050301.1 | TWP/SMET/C2 - Upper wind direction sensor failure | twpsmet60sC2.b1 |
D050322.2 | TWP/SMET/C2 - Upper wind direction sensor failure | twpsmet60sC2.b1 |
D050504.2 | TWP/GNDRAD/C2 - IRT connector | twpgndrad60sC2.b1 |
D050714.1 | TWP/SMET/C2 - RH sensor failure | twpsmet60sC2.b1 |
D050920.4 | TWP/SMET/C2 - Instrument maintenance | twpsmet60sC2.b1 |
D050921.2 | TWP/SMET/C2 - ORG data incorrect | twpsmet60sC2.b1 |
D060614.2 | TWP/SMET/C2 - Temp/RH probe failure | twpsmet60sC2.b1 |
D060630.35 | TWP/GNDRAD/C2 - Reprocess: Longwave Calibration error | twpgndrad60sC2.b1 |
D060804.1 | TWP/SKYRAD/C2 - IRT signal loss | twpskyrad60sC2.b1 |
D060818.2 | TWP/SMET/C2 - Reprocess: Barometric pressure units change | twpsmet60sC2.b1 |
D061011.3 | TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC2.b1 |
D061016.1 | TWP/SKYRAD/C2 - IRT signal | twpskyrad60sC2.b1 |
D061214.2 | TWP/SMET/C2 - Barometer failure | twpsmet60sC2.b1 |
D070110.1 | TWP/GNDRAD/C2 - IRT signal | twpgndrad60sC2.b1 |
D070404.2 | TWP/SKYRAD/C2 - IRT measurement error | twpskyrad60sC2.b1 |
D081022.5 | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage | twpsmet60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/25/2001 | 0000 | 08/17/2001 | 2359 |
08/25/2001 | 0000 | 09/04/2001 | 2359 |
09/21/2001 | 0000 | 09/26/2001 | 2359 |
Subject: | TWP/SKYRAD/C2 - Solar tracker failure |
DataStreams: | twpskyrad20sC2.a1, twpskyrad60sC2.a1, twpskyrad60sC2.b1 |
Description: | The solar tracker malfunctioned and did not track the sun reliably during the specified periods. PIR, PSP, and NIP data are suspect. The solar tracker may have operated satisfactorily during some periods within these time frames. Approximate verification on quality could be made by comparing the NIP data with the MFRSR data. |
Measurements: | twpskyrad60sC2.a1:
twpskyrad60sC2.b1:
twpskyrad20sC2.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2001 | 0300 | 04/30/2002 | 2359 |
Subject: | TWP/SKYRAD/C2 - Reprocess: PIR identified as unshaded is really shaded |
DataStreams: | twpskyrad60sC2.b1 |
Description: | On 17Sep01 the Global PIR was moved from the unshaded position on the Skyrad stand to the new 'shaded' spot on the new K&Z tracker. It is still using the same Logger channel as it did as an unshaded PIR even though it is now shaded. |
Measurements: | twpskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/2003 | 1000 | 04/24/2003 | 0020 |
Subject: | TWP/SMET/C2 - Upper wind sensor failed |
DataStreams: | twpsmet60sC2.b1 |
Description: | The upper wind speed sensor failed. Wind speeds were reported as 0 m/s and wind direction data was not in agreement with the lower wind sensor. Anemometer was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/12/2003 | 2100 | 09/14/2003 | 1100 |
Subject: | TWP/GNDRAD/C2 - IRT problem |
DataStreams: | twpgndrad60sC2.b1 |
Description: | The GNDRAD IRT exhibited a positive bias compared to the PIR from 2100 to 0700 UTC each day. The problem was corrected by removing the signal cable, cleaning the contacts, and reconnecting the cable. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0005 | 03/03/2003 | 2102 |
Subject: | TWP/SKYRAD/C2 - IRT incorrect min/delta values |
DataStreams: | twpskyrad60sC2.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: | twpskyrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/10/2004 | 0000 | 04/24/2004 | 2303 |
Subject: | TWP/SMET/C2 - Lower wind sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | The lower wind sensor failed. Wind direction showed little or no variation, unlike the co-located/upper sensor. This caused depressed wind speed values as the sensor was not rotating properly to orient itself parallel to the wind stream. The sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0138 | 07/07/2004 | 2018 |
Subject: | TWP/SMET/C2 - connection and timing issues with new logger |
DataStreams: | twpsmet60sC2.b1 |
Description: | Atmospheric pressure data are intermittent during this time period due to connection problems and program timing issues with new logger installation. Data resumed normal operations after this time period. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 0311 | 07/06/2004 | 0138 |
Subject: | TWP/SMET/C2 - Negative rainfall rates |
DataStreams: | twpsmet60sC2.b1 |
Description: | Due to limitations of the Zeno dataloggers all voltage measurements from the optical rain gauge (ORG) were converted to rainfall rates. This resulted in negative values for rain rates. Any value below 0.10 mm/hr should be considered to be 0 mm/hr. New dataloggers alleviated this problem. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0137 | 08/17/2004 | 2157 |
Subject: | TWP/SMET/C2 - Incorrect rainrate equation used. |
DataStreams: | twpsmet60sC2.b1 |
Description: | There are two different Optical Raingages in use at the TWP sites. The incorrect equation was used at this site. The incorrect equation is (25*(V^1.87)) - 0.15. The correct equation is (20*(V^2)) - 0.05. The correct equation was installed. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/05/2004 | 0501 | 07/19/2004 | 0206 |
Subject: | TWP/GNDRAD/C2 - incorrect IRT calibration |
DataStreams: | twpgndrad60sC2.b1 |
Description: | When the GNDRAD data logger was upgraded, the calibration offset for the IRT was initially incorrect. |
Measurements: | twpgndrad60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2004 | 0600 | 10/18/2004 | 2300 |
Subject: | TWP/SKYRAD/C2 - IRT bias |
DataStreams: | twpskyrad60sC2.b1 |
Description: | The IRT appears to be measuring higher sky temperatures than the AERI. There is no indication as to its cause or whether the IRT or the AERI is at fault. PRB note: because the AERI is calibrated between each sample, the AERI data has a high degree of confidence and the bias is likely on the part of the IRT. |
Measurements: | twpskyrad60sC2.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 - Upper wind direction sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | The upper wind direction 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 direction sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | After replacement on 03/03/2005 the upper wind direction 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 |
---|---|---|---|
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 sensor failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | Relative humidity 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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
10/21/1998 | 0000 | 07/06/2004 | 2359 |
Subject: | TWP/SMET/C2 - Reprocess: Barometric pressure units change |
DataStreams: | twpsmet60sC2.b1 |
Description: | Barometric pressure data during this time period is reported in hPa. After this time, the data have been converted to kPa 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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
12/07/2006 | 1941 | 01/23/2007 | 0023 |
Subject: | TWP/SMET/C2 - Barometer failure |
DataStreams: | twpsmet60sC2.b1 |
Description: | The barometer began experiencing problems with noise resulting in incorrect data. The problem becames worse over time; after 12/19/2006 @0151 GMT the barometer data is completely missing. The barometer was replaced. |
Measurements: | twpsmet60sC2.b1:
|
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 measurement error |
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:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/1998 | 0000 | 02/23/2009 | 0410 |
Subject: | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC2.b1 |
Description: | The marine model of the RM Young wind sensor needs twisted pair shielded cable. The manufacturer did not originally supply the pigtail with twisted pair shielded cable. Use of twisted pair shielded cable for the rest of the cable run to the logger was also not specified. This caused an induced voltage in the wind speed line from the wind direction excitation. The induced voltage varied from sensor to sensor and probably changed anytime the cable was replaced or parts of the wind sensor were repaired or replaced. The induced voltage has been seen to vary from 0.15 m/s to as much as 1.08 m/s. |
Measurements: | twpsmet60sC2.b1:
|