Data Quality Reports for Session: 149729 User: yeonv08 Completed: 04/25/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D130118.1TWP/MICROBASE/C3 - Incorrect detection of precipitationtwpmicrobasepi2C3.c1
D130118.2TWP/MICROBASE/C3 - Detection of precipitation is suspecttwpmicrobasepi2C3.c1


DQRID : D130118.1
Start DateStart TimeEnd DateEnd Time
11/04/2005000003/31/20062359
Subject:
TWP/MICROBASE/C3  - Incorrect detection of precipitation
DataStreams:twpmicrobasepi2C3.c1
Description:
Microbase uses the CloudBasePrecipitation field from twparscl1clothC3.c1 to determine the 
occurrence of precipitation.  As noted in DQR D061220.35 for twparscl1clothC3.c1, the 
CloudBasePrecipitation is incorrect over this period due to a processing issue.  As a 
result, the values in the Microbase aqc_precip field are incorrect.  In addition, values of 
"14" to indicate precipitation in the Microbase aqc_liquid_water_content and 
aqc_liq_effective_radius fields are incorrect and should be ignored.  Because we don't know when 
precipitation occurred, values of liquid_water_content and liq_effective_radius are suspect over 
this period.
Measurements:twpmicrobasepi2C3.c1:
  • Liquid Effective Radius(liq_effective_radius)
  • Retrieved Liquid Water Content(liquid_water_content)


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DQRID : D130118.2
Start DateStart TimeEnd DateEnd Time
04/01/2006000008/24/20062359
Subject:
TWP/MICROBASE/C3 - Detection of precipitation is suspect
DataStreams:twpmicrobasepi2C3.c1
Description:
Microbase uses the CloudBasePrecipitation field from the twparscl1clothC3.c1 product to 
determine the occurrence of precipitation.  The twparscl1clothC3.c1 CloudBasePrecipitation 
field is partially derived from the precip_mean field in the twpsmet60sC3.b1 product.  
DQR D060426.8 indicates there is a grounding issue with the optical rain gauge and the 
precip_mean values from twpsmet60sC1.b1 are suspect over this period.

As a result, the values in the Microbase aqc_precip field could be suspect.  Values of 
"14" to indicate precipitation in the Microbase aqc_liquid_water_content and 
aqc_liq_effective_radius fields could be suspect as well.  Because we aren't certain when precipitation 
occurred, values of liquid_water_content and liq_effective_radius should be carefully 
evaluated during this period.
Measurements:twpmicrobasepi2C3.c1:
  • Liquid Effective Radius(liq_effective_radius)
  • Retrieved Liquid Water Content(liquid_water_content)


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