DQR ID | Subject | Data Streams Affected |
---|---|---|
D060426.8 | TWP/SMET/C3 - ORG data noisy due to degraded ground | twpsmet60sC3.b1 |
D060522.1 | TWP/SMET/C1 - Upper wind sensor failure | twpsmet60sC1.b1 |
D060614.2 | TWP/SMET/C2 - Temp/RH probe failure | twpsmet60sC2.b1 |
D060627.1 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.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 |
D061214.2 | TWP/SMET/C2 - Barometer failure | twpsmet60sC2.b1 |
D070306.2 | TWP/SMET/C3 - Barometer Data Incorrect | twpsmet60sC3.b1 |
D070306.3 | TWP/SMET/C3 - Water in enclosure | twpsmet60sC3.b1 |
D070409.1 | TWP/SMET/C1 - Upper winds failure | twpsmet60sC1.b1 |
D070510.5 | TWP/SMET/C2 - Lower windspeed sensor questionable | twpsmet60sC2.b1 |
D070520.1 | TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect | twpsmet60sC2.b1 |
D070803.1 | TWP/SMET/C3 - Upper wind speed artificially slow | twpsmet60sC3.b1 |
D071105.1 | TWP/SMET/C3 - ORG overestimated rainfall | twpsmet60sC3.b1 |
D071219.1 | TWP/SMET/C2 - Lower Wind Speed Data Suspect | twpsmet60sC2.b1 |
D080225.1 | TWP/SMET/C3 - Upper Wind Sensor Data Questionable | twpsmet60sC3.b1 |
D080611.2 | TWP/SMET/C3 - Lower Wind Direction Intermittently Wrong | twpsmet60sC3.b1 |
D080617.1 | TWP/SMET/C2 - ORG rainfall measurements too large | twpsmet60sC2.b1 |
D080707.2 | TWP/SMET/C1 - ORG Precip Data Incorrect | twpsmet60sC1.b1 |
D080715.1 | TWP/SMET/C3 - Upper wind speed data incorrect | twpsmet60sC3.b1 |
D081022.8 | TWP/SMET/C3 - Wind Speed data contain offset due to induced voltage | twpsmet60sC3.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 |
---|---|---|---|
05/09/2006 | 0000 | 10/14/2006 | 0237 |
Subject: | TWP/SMET/C1 - Upper wind 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 - Data not representative |
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 |
---|---|---|---|
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 | 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 |
---|---|---|---|
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 |
---|---|---|---|
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 - Water in enclosure |
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 |
---|---|---|---|
03/19/2007 | 0000 | 06/12/2007 | 0406 |
Subject: | TWP/SMET/C1 - Upper winds failure |
DataStreams: | twpsmet60sC1.b1 |
Description: | The upper wind instrument was inoperative resulting in constant wind direction and speed. A failed cable was replaced. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/05/2007 | 0000 | 08/19/2007 | 2135 |
Subject: | TWP/SMET/C2 - Lower windspeed sensor questionable |
DataStreams: | twpsmet60sC2.b1 |
Description: | Lower wind speed sensor had degraded bearings. This sensor was reporting as much as 0.4 m/s lower values than the upper sensors when the winds were 2 m/s or below. The sensor was replaced. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/11/2007 | 0000 | 05/22/2007 | 0047 |
Subject: | TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Wind directions between lower and upper anemometers were displaced by approximately 45 degrees when a new sensor was installed to replace the failing lower winde sensor. The new sensor direction data incorrect. |
Measurements: | twpsmet60sC2.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 |
---|---|---|---|
11/02/2007 | 1855 | 11/02/2007 | 2010 |
Subject: | TWP/SMET/C3 - ORG overestimated rainfall |
DataStreams: | twpsmet60sC3.b1 |
Description: | Optical rain gauge (ORG) measured approximately 10mm higher than two co-located tipping bucket rain gauges and a co-located disdrometer. The ORG is typically higher but usually not by an order of magnitude. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/22/2007 | 0048 | 08/19/2007 | 2150 |
Subject: | TWP/SMET/C2 - Lower Wind Speed Data Suspect |
DataStreams: | twpsmet60sC2.b1 |
Description: | The lower wind speed bearings appeared to be binding at speeds below 2 m/s as it did not compare well with the upper wind sensor. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2008 | 0000 | 02/27/2008 | 0315 |
Subject: | TWP/SMET/C3 - Upper Wind Sensor Data Questionable |
DataStreams: | twpsmet60sC3.b1 |
Description: | The wind_up vs. wind_low wind directions diverged, with the differences between the two eventually reached 45 degrees. The Upper sensor was found to be mis-aligned and loose. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/27/2008 | 1945 | 06/24/2008 | 0113 |
Subject: | TWP/SMET/C3 - Lower Wind Direction Intermittently Wrong |
DataStreams: | twpsmet60sC3.b1 |
Description: | The lower wind sensor cabling had a problem causing an intermittent connection for the wind direction data. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/08/2008 | 0000 | 08/07/2008 | 2300 |
Subject: | TWP/SMET/C2 - ORG rainfall measurements too large |
DataStreams: | twpsmet60sC2.b1 |
Description: | The ORG was collecting large amounts of rainfall compared to the co-located tipping bucket raingauge. The cable was chewed by mice causing the wires to make contact intermittently mimicking rainfall. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/07/2008 | 1300 | 02/09/2008 | 0600 |
Subject: | TWP/SMET/C1 - ORG Precip Data Incorrect |
DataStreams: | twpsmet60sC1.b1 |
Description: | Moisture intrusion into the sensor body allowed condensation on the lens of the ORG. Continual and long-term precipitation was reported during this time. |
Measurements: | twpsmet60sC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/08/2008 | 2045 | 07/17/2008 | 0144 |
Subject: | TWP/SMET/C3 - Upper wind speed data incorrect |
DataStreams: | twpsmet60sC3.b1 |
Description: | Beginning on 07/08, the upper wind sensor started reporting significantly lower wind speeds than the lower wind sensor. The cable connections weather proofing failed allowing corrosion to occur and increasing he resistance of the cables. This in turn lowered the wind speeds artificially. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/12/2004 | 0000 | 10/17/2008 | 0627 |
Subject: | TWP/SMET/C3 - Wind Speed data contain offset due to induced voltage |
DataStreams: | twpsmet60sC3.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: | twpsmet60sC3.b1:
|