Data Quality Reports for Session: 123497 User: ql_data Completed: 10/07/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D090522.1GRW/MWR/M1 - Loose mirrorgrwmwrlosM1.b1, grwmwrtipM1.a1
D090527.2GRW/MWRP/M1 - Reprocessed: Updated calibration coefficientsgrwmwrpM1.b1


DQRID : D090522.1
Start DateStart TimeEnd DateEnd Time
05/01/2009000006/16/20090745
Subject:
GRW/MWR/M1 - Loose mirror
DataStreams:grwmwrlosM1.b1, grwmwrtipM1.a1
Description:
The data from the MWR were suspicious and became progressively worse. The problem was 
traced back to the fact that the screw that keeps the mirror in place had become loose and 
the mirror was freely rotating. 

The mirror was tightened on 6/9/2009, however the measurements were noisy until 6/16, when 
the instrument was rebooted and all the connections checked. 

Measurements between 5/1 and 6/9 should not be used. Data between 6/9 and 6/16 are usable, 
although they are very noisy.
Measurements:grwmwrlosM1.b1:
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • 31.4 GHz sky signal(sky31)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • MWR column precipitable water vapor(vap)
  • Averaged total liquid water along LOS path(liq)
  • 31.4 GHz blackbody(bb31)
  • 23.8 GHz sky signal(sky23)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 23.8 GHz Blackbody signal(bb23)
grwmwrtipM1.a1:
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz Blackbody signal(bb23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • 23.8 GHz sky signal(tipsky23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz sky signal(tipsky31)
  • 31.4 GHz blackbody(bb31)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

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DQRID : D090527.2
Start DateStart TimeEnd DateEnd Time
05/01/2009000005/15/20092100
Subject:
GRW/MWRP/M1 - Reprocessed: Updated calibration coefficients
DataStreams:grwmwrpM1.b1
Description:
On 5/15 the K-band calibrations were updated with coefficients derived from tip curves.  
The 20090501-20090515 data were reprocessed to apply the updated calibration coefficients.
Measurements:grwmwrpM1.b1:
  • Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
  • Retrieved water vapor density(waterVaporDensity)
  • Retrieved liquid water path(liquidWaterPath)
  • Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
  • Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
  • Derived relative humidity(relativeHumidity)
  • Interpolated water vapor mixing ratio(waterVaporMixingRatio)

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