Data Quality Reports for Session: 129313 User: laura1riih Completed: 07/30/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060113.1TWP/VCEIL/C3 - low receiver sensitivitytwpvceil25kC3.b1


DQRID : D060113.1
Start DateStart TimeEnd DateEnd Time
12/12/2005055505/18/20062300
Subject:
TWP/VCEIL/C3 - low receiver sensitivity
DataStreams:twpvceil25kC3.b1
Description:
The ceilometer reported frequent receiver alarms. There are periods when the receiver 
sensitivity dropped to about 50%. The problem was corrected by replacing the instrument with 
a spare.
Measurements:twpvceil25kC3.b1:
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Aerosol backscatter coefficient at 355 nm(backscatter)
  • Backscatter sum(sum_backscatter)
  • Second lowest cloud base height(second_cbh)
  • Third cloud base height(third_cbh)
  • Lowest cloud base height detected.(first_cbh)
  • Millivolts at internal ADC input (0 to 2500)(background_light)
  • Altitude of highest signal(alt_highest_signal)
  • Vertical visibility(vertical_visibility)

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