Data Quality Reports for Session: 105696 User: ejn2 Completed: 05/18/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050614.1SGP/VCEIL/C1 - poor signalsgpvceil25kC1.b1
D060707.5SGP/VCEIL/C1 - low amplitudesgpvceil25kC1.b1


DQRID : D050614.1
Start DateStart TimeEnd DateEnd Time
05/05/2005184204/19/20061713
Subject:
SGP/VCEIL/C1 - poor signal
DataStreams:sgpvceil25kC1.b1
Description:
When parameters were changed (set noise_h2_compensation to "ON" and units to "METERS") to 
correct a low amplitude problem, the backscatter plots began displaying horizontal 
stripes indicating detector "ringing". However, the cloud base heights are not affected. The 
problem was corrected when the instrument was replaced.
Measurements:sgpvceil25kC1.b1:
  • Detection status. See details(detection_status)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)


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DQRID : D060707.5
Start DateStart TimeEnd DateEnd Time
12/06/2004182005/05/20051841
Subject:
SGP/VCEIL/C1 - low amplitude
DataStreams:sgpvceil25kC1.b1
Description:
When the instrument was replaced with a spare, the backscatter plots began displaying a 
suspiciously low amount of amplitude (noise) but the cloud base heights were not affected. 

Discovered that when the vendor repaired this unit in August 2004, noise compensation was 
set to "OFF". Changed the parameters to "ON".

Also noted that the measurement units was set to "FEET".  This was changed to "METERS.  
The heights are not affected because the ingest recognizes the raw data units and 
automatically converts to meters.
Measurements:sgpvceil25kC1.b1:
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)


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