DQR ID | Subject | Data Streams Affected |
---|---|---|
D050418.2 | TWP/SMET/C3 - Lower wind direction sensor failure | 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 |
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 |
---|---|---|---|
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 |
---|---|---|---|
03/12/2004 | 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:
|