DQR ID | Subject | Data Streams Affected |
---|---|---|
D080428.4 | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values | twpsmet60sC2.b1 |
D081022.5 | TWP/SMET/C2 - Wind Speed data contain offset due to induced voltage | twpsmet60sC2.b1 |
D090604.2 | TWP/SMET/C2 - Barometer data incorrect | twpsmet60sC2.b1 |
D090918.1 | TWP/SMET/C2 - Induced wind speed when calm | twpsmet60sC2.b1 |
D091030.2 | TWP/SMET/C2 - Tower Lowered for Maintenance | twpsmet60sC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 0000 | 06/30/2010 | 2359 |
Subject: | TWP/SMET/C2 - Reprocess: ORG Data has very small rainrate values |
DataStreams: | twpsmet60sC2.b1 |
Description: | The ORG data is collected via analog signal and not digital. Therefore, we continuously collect data even when no rain is occurring. We also capture small events such as leaves, large bugs, dust, etc blowing through the measurement path. Because this discrete event occurs quickly the value is usually captured for 1 or 2 seconds. This value is then averaged to the minute producing rainrate on the order of .009 mm/hr or less. These values are not indicative of rain and should be removed from the record or summing over long periods can bias the climate record. We will reprocess the data to remove these small values. |
Measurements: | twpsmet60sC2.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:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/20/2009 | 0004 | 06/05/2009 | 2359 |
Subject: | TWP/SMET/C2 - Barometer data incorrect |
DataStreams: | twpsmet60sC2.b1 |
Description: | Beginning 05/20, atmos_pressure exceeded MAX between ~21:00 and 01:00 UTC on most days. The inlet tube was accidentally pinched in the door of the logger enclosure artificially increasing the atmospheric pressure during the listed times. Only a few hours exceeded max limits. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2009 | 0100 | 10/15/2009 | 0300 |
Subject: | TWP/SMET/C2 - Induced wind speed when calm |
DataStreams: | twpsmet60sC2.b1 |
Description: | The upper and lower wind sensors were not trending well at wind speed below 1 m/s. Both sensors were showing values above 0m/s when calm. The lightning protector was at fault resulting in an induced wind voltage during calm conditions. Users should subtract any offset found (for example 0.19 m/s for upper wind speed) when the wind speeds are flat-lined. The offset value was not consistent. |
Measurements: | twpsmet60sC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/14/2009 | 2150 | 10/15/2009 | 0315 |
Subject: | TWP/SMET/C2 - Tower Lowered for Maintenance |
DataStreams: | twpsmet60sC2.b1 |
Description: | Data is suspect due to the tower being lowered. |
Measurements: | twpsmet60sC2.b1:
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