Data Quality Reports for Session: 114675 User: gaustad Completed: 10/07/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D070510.5TWP/SMET/C2 - Lower windspeed sensor questionabletwpsmet60sC2.b1
D070520.1TWP/SMET/C2 - Lower Wind Sensor Direction Incorrecttwpsmet60sC2.b1
D071219.1TWP/SMET/C2 - Lower Wind Speed Data Suspecttwpsmet60sC2.b1


DQRID : D070510.5
Start DateStart TimeEnd DateEnd Time
04/05/2007000008/19/20072135
Subject:
TWP/SMET/C2 - Lower windspeed sensor questionable
DataStreams:twpsmet60sC2.b1
Description:
Lower wind speed sensor had degraded bearings.  This sensor was reporting as much as 0.4 
m/s lower values than the upper sensors when the winds were 2 m/s or below.  The sensor 
was replaced.
Measurements:twpsmet60sC2.b1:
  • Lower sensor, wind speed minimum(lo_spd_min)
  • Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
  • Lower sensor, wind speed maximum(lo_spd_max)
  • Lower sensor, wind speed vector average(lo_spd_vec_avg)
  • Lower sensor, wind speed standard deviation(lo_spd_sd)

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DQRID : D070520.1
Start DateStart TimeEnd DateEnd Time
05/11/2007000005/22/20070047
Subject:
TWP/SMET/C2 - Lower Wind Sensor Direction Incorrect
DataStreams:twpsmet60sC2.b1
Description:
Wind directions between lower and upper anemometers were displaced by approximately 45 
degrees when a new sensor was installed to replace the failing lower winde sensor.  The new 
sensor direction data incorrect.
Measurements:twpsmet60sC2.b1:
  • Lower sensor, wind direction vector average(lo_dir_vec_avg)
  • Lower sensor, wind direction standard deviation(lo_dir_sd)

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DQRID : D071219.1
Start DateStart TimeEnd DateEnd Time
05/22/2007004808/19/20072150
Subject:
TWP/SMET/C2 - Lower Wind Speed Data Suspect
DataStreams:twpsmet60sC2.b1
Description:
The lower wind speed bearings appeared to be binding at speeds below 2 m/s as it did not 
compare well with the upper wind sensor.
Measurements:twpsmet60sC2.b1:
  • Lower sensor, wind speed minimum(lo_spd_min)
  • Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
  • Lower sensor, wind speed maximum(lo_spd_max)
  • Lower sensor, wind speed vector average(lo_spd_vec_avg)
  • Lower sensor, wind speed standard deviation(lo_spd_sd)

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