Data Quality Reports for Session: 131998 User: zzj2006hap Completed: 12/04/2010


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D101109.1NSA/MWRP/C1 - Reprocess: Incorrect calibrationnsamwrpC1.b1


DQRID : D101109.1
Start DateStart TimeEnd DateEnd Time
09/21/2010000011/15/20102113
Subject:
NSA/MWRP/C1 - Reprocess: Incorrect calibration
DataStreams:nsamwrpC1.b1
Description:
The calibration of the MWRP drifted starting on September 21. The drift caused a negative 
LWP. On 10/21 I modified the calibration of the 30 GHz channel in an attempt to correct 
for the negative bias in LWP. The change in the calibration however caused an excessive 
increase in the PWV retrievals. The original calibration values were reinstated on 10/29. I 
then recomputed the temperature coefficients as well as the noise diode injection 
temperature from tip curves and uploaded the new values on Nov 15 2010.
Measurements:nsamwrpC1.b1:
  • Water vapor, total precipitable, derived from Tbright using stat. retrvl.(totalPrecipitableWater)
  • Density, water vapor, prof. from sfc.-10 km, der. from Tbright stat. retrvl.(waterVaporDensity)
  • Humidity, relative, prof. from sfc.-10km, from water vap. dens. and temp. prof.(relativeHumidity)
  • Liquid water content, cloud, vert. prof. sfc.-10km, from Tbright stat. retrvl.(liquidWaterContent)
  • Microwave brightness temperature(brightnessTemperature)
  • Liquid water path, from brightness temperatures using statistical retrieval(liquidWaterPath)
  • Retrieved water vapor mixing ratio(waterVaporMixingRatio)
  • Liquid water path, from Tbright at 23.835 and 30.0 GHz only, using stat. retrvl.(liquidWaterPath2)
  • Water vapor, tot. precipitable, from Tbright, 23.835 & 30.0 GHz, stat. retrvl.(totalPrecipitableWater2)


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