Data Quality Reports for Session: 135547 User: troyan Completed: 06/17/2011


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D100215.1SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fieldssgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1
D100729.1SGP/WACR/C1 - Reflectivity and Height OffsetssgpwacrC1.b1, sgpwacrspeccmaskxpolC1.a0, sgpwacrspeccmaskcopolC1.a0


DQRID : D100215.1
Start DateStart TimeEnd DateEnd Time
04/01/2001000010/31/20092359
Subject:
SGP/VCEIL/C1/B4/B5/B6 - Reprocess: Incorrect serial_number and sum_backscatter fields
DataStreams:sgpvceil25kB4.b1, sgpvceil25kB5.b1, sgpvceil25kB6.b1, sgpvceil25kC1.b1
Description:
Attribute serial_number: In most cases, this field is not representative of the actual 
serial number of the instrument because the value did not change when an instrument changed 
locations or was replaced with a spare.

Variable sum_backscatter: An out-of-range condition for the "sum of detected and 
normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 
0.0999 /srad.

This DQR also applies to a1 level data collected prior to b1 level.
Measurements:sgpvceil25kC1.b1:
  • sum_backscatter

sgpvceil25kB4.b1:
  • sum_backscatter

sgpvceil25kB6.b1:
  • sum_backscatter

sgpvceil25kB5.b1:
  • sum_backscatter


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DQRID : D100729.1
Start DateStart TimeEnd DateEnd Time
12/05/2005000009/23/20082359
Subject:
SGP/WACR/C1 -  Reflectivity and Height Offsets
DataStreams:sgpwacrC1.b1, sgpwacrspeccmaskxpolC1.a0, sgpwacrspeccmaskcopolC1.a0
Description:
The instrument vendor has informed us of a range (height) offset of 13 m and has provided 
an updated reflectivity calibration.  All values reported for 'Reflectivity' are 
approximately 3 dB too low.   In addition, the Reflectivity in the first and fourth range gates 
(starting from the surface) need to be further corrected by an additional 2.7 and -0.9 dB, 
respectively. The 'height' field values are 13.33 m too low.  The data will be 
reprocessed to correct these problems.

Update:  The sgpwacrC1.b1 data were reprocessed to correct the height and reflectivity 
offsets.  The corrected data were archived 20100910-20100915.
Measurements:sgpwacrspeccmaskcopolC1.a0:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • heights

sgpwacrspeccmaskxpolC1.a0:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • heights

sgpwacrC1.b1:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • heights


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