Data Quality Reports for Session: 105494 User: cwilliams Completed: 05/04/2007

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060113.1TWP/VCEIL/C3 - low receiver sensitivitytwpvceil25kC3.b1
D061220.35TWP/ARSCL/C3 - Reprocess: ARSCL CloudBasePrecipitation field incorrecttwparscl1clothC3.c1, twparsclcbh1clothC3.c1, twpmmcrmode1bl200511041clothC3.c1,
twpmmcrmode2ci200511041clothC3.c1, twpmmcrmode3ge200511041clothC3.c1,
twpmmcrmode4pr200511041clothC3.c1


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:
  • Lowest cloud base height detected.(first_cbh)
  • Vertical visibility(vertical_visibility)
  • Aerosol volume backscattering coefficient at 355 nm(backscatter)
  • SUM of detected and normalized backscatter(sum_backscatter)
  • Second lowest cloud base height(second_cbh)
  • Third cloud base height(third_cbh)
  • Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
  • Altitude of highest signal(alt_highest_signal)
  • Millivolts at internal ADC input (0 to 2500)(background_light)

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DQRID : D061220.35
Start DateStart TimeEnd DateEnd Time
11/04/2005000003/31/20062359
Subject:
TWP/ARSCL/C3 - Reprocess: ARSCL CloudBasePrecipitation field incorrect
DataStreams:twparscl1clothC3.c1, twparsclcbh1clothC3.c1, twpmmcrmode1bl200511041clothC3.c1,
twpmmcrmode2ci200511041clothC3.c1, twpmmcrmode3ge200511041clothC3.c1,
twpmmcrmode4pr200511041clothC3.c1
Description:
The CloudBasePrecipitation field is incorrect and has no physical meaning.  An ARSCL 
processing error occurred when the smet60s data stream format changed, causing the wrong data 
field to be used to supply precipitation measurements to the ARSCL VAP.  The error caused 
no significant degradation in other ARSCL fields, since manual quality control corrected 
any related errors.
Measurements:twparsclcbh1clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
twpmmcrmode4pr200511041clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
twpmmcrmode2ci200511041clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
twpmmcrmode3ge200511041clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
twparscl1clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)
twpmmcrmode1bl200511041clothC3.c1:
  • Microwave Radiometer Wet Window/Optical Rain Gauge Cloud Base Height(CloudBasePrecipitation)

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