DQR ID | Subject | Data Streams Affected |
---|---|---|
D050210.1 | TWP/SMET/C3 - Data non-representative | twpsmet60sC3.b1 |
D050418.2 | TWP/SMET/C3 - Lower wind direction sensor failure | twpsmet60sC3.b1 |
D050808.3 | TWP/SMET/C3 - Data not representative | twpsmet60sC3.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 |
D060426.8 | TWP/SMET/C3 - ORG data noisy due to degraded ground | twpsmet60sC3.b1 |
D061011.4 | TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added | twpsmet60sC3.b1 |
D081022.8 | TWP/SMET/C3 - Wind Speed data contain offset due to induced voltage | twpsmet60sC3.b1 |
D090225.3 | TWP/SMET/C3 - Reprocess: Temperature data biased low | twpsmet60sC3.b1 |
D090515.1 | TWP/SMET/C3 - Reprocess: Temperature Biased low by 1.06 Degrees | twpsmet60sC3.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 - Lower wind direction sensor failure |
DataStreams: | twpsmet60sC3.b1 |
Description: | The lower wind direction sensor failed on 4/14 and disagrees significantly with the upper wind direction sensor. The lower wind 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. Data are not representative of local conditions. |
Measurements: | twpsmet60sC3.b1:
|
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 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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
03/12/2002 | 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:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/19/2004 | 0519 | 04/19/2005 | 0419 |
Subject: | TWP/SMET/C3 - Reprocess: Temperature data biased low |
DataStreams: | twpsmet60sC3.b1 |
Description: | Due to a datalogger problem, the temperature data were biased low by 2.13 degrees C. The data will be reprocessed. |
Measurements: | twpsmet60sC3.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/19/2005 | 0420 | 04/04/2009 | 0115 |
Subject: | TWP/SMET/C3 - Reprocess: Temperature Biased low by 1.06 Degrees |
DataStreams: | twpsmet60sC3.b1 |
Description: | The temperature of the SMET system was biased low by 1.06 Deg C due to a non-precision resistor being used int he measurement circuit. The data will be reprocessed. Saturation Vapor pressure and Vapor pressure will have to be reprocessed also. Add 1.06 degrees to the temperature data. Correct Sat Vap Press using the Buck approximation: Es = 6.1121exp((17.502*T)/(240.97 + T) where T is the temperature in C. Correct Vapor pressure using: E = (RH*Es)/100 |
Measurements: | twpsmet60sC3.b1:
|