Data Quality Reports for Session: 180437 User: lij2 Completed: 10/12/2016

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected Data Quality Metric
D070717.1SGP/RL/C1 - Invalid liquid water channel datasgprlC1.a0Incorrect
D080829.3SGP/RL/C1 - Degraded sensitivity in WFOV channelssgprlC1.a0Suspect


DQRID : D070717.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
09/06/2006192003/05/20080000Incorrect
Subject:
SGP/RL/C1 - Invalid liquid water channel data
DataStreams:sgprlC1.a0
Description:
On 20060906, the liquid water channel (LWC) was disabled due to the removal of its 
photomultiplier tube (PMT).  Consequently, the signals recorded for the LWC contain either zero 
or pure noise after that date.

Also, starting on 20070522, the LWC was populated with data from the T2 channel as a 
result of a slight reconfiguration of the data acquisition system.

On 4 March 2008 The LW channel photomultiplier tube was reinstalled in the Raman lidar. 
Effective 0000 UTC on 5 March 2008 the LW channel began producing valid liquid water data 
once again.
Measurements:sgprlC1.a0:
  • liquid_counts_high
  • liquid_analog_high

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DQRID : D080829.3
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/07/2008000003/10/20081500Suspect
04/09/2008180004/10/20081500Suspect
03/25/2008050004/04/20081600Suspect
Subject:
SGP/RL/C1 - Degraded sensitivity in WFOV channels
DataStreams:sgprlC1.a0
Description:
The sensitivity of all the wide field-of-view (WFOV) channels was abnormally low due a 
malfunction of the filter wheel. The filter wheel for the WFOV channels did not rotate into 
position properly and thus partially obscured the return light.
Measurements:sgprlC1.a0:
  • water_analog_low
  • Raman backscatter, number of photons counted in the low nitrogen channel(nitrogen_counts_low)
  • nitrogen_analog_low
  • elastic_counts_low
  • water_counts_low
  • elastic_analog_low

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