Data Quality Reports for Session: 104771 User: moudry Completed: 03/14/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D061003.1NSA/METTWR/C1 - All data from 10m Level Missingnsamettwr4hC1.b1
D061012.2NSA/METTWR/C1 - Missing CMH datansamettwr4hC1.b1
D061023.1NSA/METTWR/C1 - 10m level loss of powernsamettwr4hC1.b1
D061025.1NSA/METTWR/C1 - 2m T/RH probe aspirator fan failednsamettwr4hC1.b1
D061128.2NSA/METTWR/C1 - Wind direction sensor frozennsamettwr4hC1.b1
D070226.1NSA/METTWR/C1 - 40m Wind Direction Data Suspectnsamettwr4hC1.b1


DQRID : D061003.1
Start DateStart TimeEnd DateEnd Time
09/25/2006223410/04/20062347
Subject:
NSA/METTWR/C1 - All data from 10m Level Missing
DataStreams:nsamettwr4hC1.b1
Description:
The winch that lowers the tower booms failed.  Manual testing of the motor and winch 
allowed the booms to be lowered briefly and then raised back into position.  A heavy freezing 
rain/icing event added extra weight to the booms.  This extra weight was suspected as the 
cause as to why the 10m boom became disconnected.  After a new motor was installed and 
all booms were lowered and re-raised the 10m level came back on line.
Measurements:nsamettwr4hC1.b1:
  • 10m Average Calculated Dew Point(DP10M_AVG)
  • 10m Average QLI Reference Temperature(RefT10m_AVG)
  • Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
  • 10m Average Relative Humidity(RH10M_AVG)
  • 10m Vector Averaged Wind Speed(WS10M_U_WVT)
  • 10m Average Calculated Vapor Pressure(VP10M_AVG)
  • 10m Average QLI Input Voltage(Volt10M_AVG)
  • Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
  • 10m Average Temperature(T10M_AVG)
  • Standard Deviation of 10m Relative Humidity(RH10M_STD)
  • 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
  • 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
  • Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
  • Standard Deviation of 10m Temperature(T10M_STD)

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DQRID : D061012.2
Start DateStart TimeEnd DateEnd Time
10/12/2006035110/14/20060038
Subject:
NSA/METTWR/C1 - Missing CMH data
DataStreams:nsamettwr4hC1.b1
Description:
CMH data are missing.  Corrosion in the serial data line connections caused a loss of 
communication with the CMH.
Measurements:nsamettwr4hC1.b1:
  • Chilled Mirror Calculated Vapor Pressure(VPCMH)
  • Chilled Mirror Calculated Relative Humidity(CMHRH)
  • Chilled Mirror Dew Point(CMHDP)
  • Chilled Mirror Temperature(CMHTemp)
  • Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

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DQRID : D061023.1
Start DateStart TimeEnd DateEnd Time
10/18/2006184010/23/20062230
Subject:
NSA/METTWR/C1 - 10m level loss of power
DataStreams:nsamettwr4hC1.b1
Description:
The 10 meter instrument level lost power so all variables from this level are missing.
Measurements:nsamettwr4hC1.b1:
  • 10m Average Calculated Dew Point(DP10M_AVG)
  • 10m Average QLI Reference Temperature(RefT10m_AVG)
  • Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
  • 10m Average Relative Humidity(RH10M_AVG)
  • 10m Vector Averaged Wind Speed(WS10M_U_WVT)
  • 10m Average Calculated Vapor Pressure(VP10M_AVG)
  • 10m Average QLI Input Voltage(Volt10M_AVG)
  • Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
  • 10m Average Temperature(T10M_AVG)
  • Standard Deviation of 10m Relative Humidity(RH10M_STD)
  • 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
  • 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
  • Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
  • Standard Deviation of 10m Temperature(T10M_STD)

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DQRID : D061025.1
Start DateStart TimeEnd DateEnd Time
10/18/2006224010/23/20062230
Subject:
NSA/METTWR/C1 - 2m T/RH probe aspirator fan failed
DataStreams:nsamettwr4hC1.b1
Description:
The aspirator fan for the 2m level T/RH probe failed.  This caused higher than normal 
readings for temp and RH and artificially smoothed the data.
Measurements:nsamettwr4hC1.b1:
  • 2m Average Calculated Vapor Pressure(VP2M_AVG)
  • Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
  • Standard Deviation of 2m Relative Humidity(RH2M_STD)
  • 2m Average Relative Humidity(RH2M_AVG)
  • Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
  • 2m Average Temperature(T2M_AVG)
  • Standard Deviation of 2m Temperature(T2M_STD)
  • 2m Average Calculated Dew Point(DP2M_AVG)

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DQRID : D061128.2
Start DateStart TimeEnd DateEnd Time
11/24/2006233611/27/20060253
Subject:
NSA/METTWR/C1 - Wind direction sensor frozen
DataStreams:nsamettwr4hC1.b1
Description:
After a power outage the 40m wind direction sensor was frozen.  Data from this sensor was 
not representative of the true winds.
Measurements:nsamettwr4hC1.b1:
  • 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
  • Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)

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DQRID : D070226.1
Start DateStart TimeEnd DateEnd Time
11/20/2006003011/27/20060254
12/08/2006012512/14/20062229
12/16/2006154512/21/20061105
12/23/2006161201/18/20072357
01/20/2007135701/29/20072140
Subject:
NSA/METTWR/C1 - 40m Wind Direction Data Suspect
DataStreams:nsamettwr4hC1.b1
Description:
The 40m wind direction data was suspect due to icing on the vane or a failing shafter 
heater or a combination of both.  The affected data can be easily seen on comparison plots 
with other levels data or by checking the standard deviation of the 40m wind direction.  
Any standard deviation of less than 0.10 degrees for the 40m level suggest a sluggish/ice 
affected sensor.
Measurements:nsamettwr4hC1.b1:
  • 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
  • Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)

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