Data Quality Reports for Session: 130822 User: arunchandr Completed: 10/11/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D100216.3NIM/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fieldsnimvceil25kM1.b1
D100729.2NIM/WACR/M1 - Reflectivity and Height OffsetsnimwacrM1.b1, nimwacrspeccmaskxpolM1.a0, nimwacrspeccmaskcopolM1.a0


DQRID : D100216.3
Start DateStart TimeEnd DateEnd Time
11/23/2005000001/07/20072359
Subject:
NIM/VCEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields
DataStreams:nimvceil25kM1.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.
Measurements:nimvceil25kM1.b1:
  • sum_backscatter

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DQRID : D100729.2
Start DateStart TimeEnd DateEnd Time
03/16/2006000012/29/20062359
Subject:
NIM/WACR/M1 - Reflectivity and Height Offsets
DataStreams:nimwacrM1.b1, nimwacrspeccmaskxpolM1.a0, nimwacrspeccmaskcopolM1.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 1.5 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.
Measurements:nimwacrspeccmaskxpolM1.a0:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • heights
nimwacrspeccmaskcopolM1.a0:
  • Cloud, reflectivity, at altitude(Reflectivity)
  • heights
nimwacrM1.b1:
  • heights
  • Cloud, reflectivity, at altitude(Reflectivity)

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