Data Quality Reports for Session: 131041 User: reh10d Completed: 10/25/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D081013.5SGP/MWR/C1 - Increased noise in 31.4 GHz channelsgpmwrlosC1.b1, sgpmwrtipC1.a1
D100729.1SGP/WACR/C1 - Reflectivity and Height OffsetssgpwacrC1.b1, sgpwacrspeccmaskxpolC1.a0, sgpwacrspeccmaskcopolC1.a0


DQRID : D081013.5
Start DateStart TimeEnd DateEnd Time
05/01/2008000011/30/20082300
Subject:
SGP/MWR/C1 - Increased noise in 31.4 GHz channel
DataStreams:sgpmwrlosC1.b1, sgpmwrtipC1.a1
Description:
The 31.4 GHz channel has been showing an increased level of noise which results in 
increased noise in the LWP retrievals. The instrument is tipping and all other parameters seem 
to be in the range. The elevate noise started in May, but it seems to have become slightly 
worse after summer. After November the noise level seems to have gone back to normal.
Measurements:sgpmwrtipC1.a1:
  • liqtip
  • tbsky31tip
sgpmwrlosC1.b1:
  • 31.4 GHz sky brightness temperature(tbsky31)
  • Total liquid water along LOS path(liq)

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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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