DQR ID | Subject | Data Streams Affected |
---|---|---|
D090331.2 | NSA/MET/C1 - Temp/RH/wind data questionable | nsametC1.b1, nsatwrC1.b1 |
D090331.4 | NSA/MET/C1 - Wind data intermittent | nsametC1.b1, nsatwrC1.b1 |
D090630.1 | NSA/MET/C1 - Met data incorrect during calibration | nsametC1.b1, nsatwrC1.b1 |
D090710.1 | NSA/MET/C1 - 2m RH values incorrect | nsametC1.b1, nsatwrC1.b1 |
D090724.1 | NSA/TWR/C2 - Reprocess: 5m vapor pressure incorrect at temps above freezing | nsatwrC2.b1 |
D090924.2 | NSA/TWR/C2 - 5m RH values Incorrect | nsatwrC2.b1 |
D091014.2 | NSA/TWR/C1 - 40m T/RH Sensor Failure | nsatwrC1.b1 |
D091201.2 | NSA/TWR/C1 - 40m and 20m Data Incorrect | nsatwrC1.b1 |
D100203.2 | NSA/TWR/C1 - 40m level data incorrect | nsatwrC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/18/2008 | 0000 | 09/20/2008 | 2359 |
Subject: | NSA/MET/C1 - Temp/RH/wind data questionable |
DataStreams: | nsametC1.b1, nsatwrC1.b1 |
Description: | New wind sensors and new T/RH probes were being installed during this time period. The tower booms were lowered and much of the data collected were not at listed heights nor were the data accurate due to configurations during install. |
Measurements: | nsametC1.b1:
nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2008 | 0000 | 12/18/2008 | 2100 |
Subject: | NSA/MET/C1 - Wind data intermittent |
DataStreams: | nsametC1.b1, nsatwrC1.b1 |
Description: | There was a loose wire on the serial data multiplexer causing the wind data to become missing during high wind situations. The high winds caused the enclosure to vibrate making the connection intermittent. |
Measurements: | nsametC1.b1:
nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/08/2009 | 2244 | 06/11/2009 | 2037 |
Subject: | NSA/MET/C1 - Met data incorrect during calibration |
DataStreams: | nsametC1.b1, nsatwrC1.b1 |
Description: | All met data from the tower booms (temp, RH, winds and derived variables) were incorrect due to the booms being lowered from their measurement heights. Additionally, the scaffolding was located directly adjacent to the booms affecting the wind field and the Temp/RH data. |
Measurements: | nsametC1.b1:
nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/13/2009 | 2215 | 07/08/2009 | 2250 |
Subject: | NSA/MET/C1 - 2m RH values incorrect |
DataStreams: | nsametC1.b1, nsatwrC1.b1 |
Description: | The new t/rh probe installed during annual calibrations and checks began to exhibit readings that were biased high compared to the Chilled Mirror Hygrometer. In high RH conditions the sensor would consistently report RH values in excess of 105%. Comparisons to the other tower levels also suggested that the 2m level RH data is suspect. |
Measurements: | nsametC1.b1:
nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/09/2008 | 0000 | 07/21/2009 | 1749 |
Subject: | NSA/TWR/C2 - Reprocess: 5m vapor pressure incorrect at temps above freezing |
DataStreams: | nsatwrC2.b1 |
Description: | The 5m Vapor pressure calculation was in error for temperatures equal to or above 0C. The 2m Dew Point values were used for calculating the Vapor Pressure when the temps were equal to or above 0C. The following formula should be used to correct the data: VP5M = (6.1365 (EXP((17.502*DP5M)/(240.97+DP5M))))*0.1. |
Measurements: | nsatwrC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/31/2009 | 1630 | 10/17/2009 | 0135 |
Subject: | NSA/TWR/C2 - 5m RH values Incorrect |
DataStreams: | nsatwrC2.b1 |
Description: | The 5m RH sensor cap had fallen off and caused the 5m RH readings to be incorrect during times of high RH (>95%). |
Measurements: | nsatwrC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/12/2009 | 2237 | 09/23/2009 | 2259 |
Subject: | NSA/TWR/C1 - 40m T/RH Sensor Failure |
DataStreams: | nsatwrC1.b1 |
Description: | 40m RH data were very noisy after tower maintenance. Following system re-boot, RH data were too high. Sensor was replaced. |
Measurements: | nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/2009 | 2328 | 12/09/2009 | 2315 |
Subject: | NSA/TWR/C1 - 40m and 20m Data Incorrect |
DataStreams: | nsatwrC1.b1 |
Description: | A power distribution problem required us to shut down power to the 40m level. All T/RH were missing and the 40m wind sensor did not have heat to remove any ice build up. All wind data from the 40m level should be viewed critically before use. The 20m T/RH sensor was power spike when the problem occurred causing this sensor to become erratic. See D100302.2 for the continuation of the 40m problem. |
Measurements: | nsatwrC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/2009 | 2316 | 07/18/2011 | 0002 |
Subject: | NSA/TWR/C1 - 40m level data incorrect |
DataStreams: | nsatwrC1.b1 |
Description: | A power distribution problem required us to turn off the 50V DC power to the 40m level. This shutdown the T/RH probe and the heating of the ultrasonic sensor. The wind data is useful at times when there is no icing present. This DQR is a follow on to D091201.2 that was closed when the 20m level T/RH probe was replaced. |
Measurements: | nsatwrC1.b1:
|