Data Quality Reports for Session: 112516 User: saraht Completed: 06/16/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080325.1NSA/METTWR/C1 - Intermittent missing datansamettwr4hC1.b1
D080326.2NSA/METTWR/C1 - 2m Wind Direction Sensor Freezingnsamettwr4hC1.b1
D080408.2NSA/METTWR/C1 - CMH Intake Fan Failurensamettwr4hC1.b1


DQRID : D080325.1
Start DateStart TimeEnd DateEnd Time
03/14/2008201203/31/20080900
Subject:
NSA/METTWR/C1 - Intermittent missing data
DataStreams:nsamettwr4hC1.b1
Description:
Intermittent failure of the CMH to communicate with the logging system occurred on a daily 
basis.  This problem occurred anywhere from 4 to 8 hrs.  Problem began after maintenance 
to replace failing aspirator fan on 03/13/2008.
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 : D080326.2
Start DateStart TimeEnd DateEnd Time
01/05/2008000003/27/20081730
Subject:
NSA/METTWR/C1 - 2m Wind Direction Sensor Freezing
DataStreams:nsamettwr4hC1.b1
Description:
The 2m wind direction was failing.  It began to exhibit instances of no movement 
suggesting it was frozen.  After some time it began to make erratic measurements compared to the 
co-located Ultrasonic and compared to the directions at the other levels.
Measurements:nsamettwr4hC1.b1:
  • Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
  • 2m Vector Averaged Wind Direction(WD2M_DU_WVT)

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DQRID : D080408.2
Start DateStart TimeEnd DateEnd Time
03/07/2008120003/13/20082345
Subject:
NSA/METTWR/C1 - CMH Intake Fan Failure
DataStreams:nsamettwr4hC1.b1
Description:
The CMH intake fan failed causing the dew point and temp data to be incorrect.

If users need only T/RH and derived variables they can use the 2m data collected using the 
HMP-45D probes.  CMH data are unrecoverable.
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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