Data Quality Reports for Session: 127906 User: kjohnson Completed: 05/20/2010


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080707.2TWP/SMET/C1 - ORG Precip Data Incorrecttwpsmet60sC1.b1
D081022.3TWP/SMET/C1 - Wind Speed data contain offset due to induced voltagetwpsmet60sC1.b1


DQRID : D080707.2
Start DateStart TimeEnd DateEnd Time
02/07/2008130002/09/20080600
Subject:
TWP/SMET/C1 - ORG Precip Data Incorrect
DataStreams:twpsmet60sC1.b1
Description:
Moisture intrusion into the sensor body allowed condensation on the lens of the ORG.  
Continual and long-term precipitation was reported during this time.
Measurements:twpsmet60sC1.b1:
  • precipitation minimum(precip_min)
  • Precipitation maximum(precip_max)
  • Precipitation standard deviation(precip_sd)
  • Precipitation mean(precip_mean)


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DQRID : D081022.3
Start DateStart TimeEnd DateEnd Time
10/09/1996000011/03/20080730
Subject:
TWP/SMET/C1 - Wind Speed data contain offset due to induced voltage
DataStreams:twpsmet60sC1.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:twpsmet60sC1.b1:
  • Lower sensor, wind speed maximum(lo_spd_max)
  • Lower sensor, wind speed vector average(lo_spd_vec_avg)
  • Upper sensor, wind speed maximum(up_spd_max)
  • Lower sensor, wind speed arithmetic average(lo_spd_arith_avg)
  • Lower sensor, wind speed minimum(lo_spd_min)
  • Upper sensor, wind speed standard deviation(up_spd_sd)
  • Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
  • Upper sensor, wind speed vector average(up_spd_vec_avg)
  • Upper sensor, wind speed minimum(up_spd_min)
  • Lower sensor, wind speed standard deviation(lo_spd_sd)


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