Data Quality Reports for Session: 114874 User: val Completed: 10/14/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060419.4NIM/MWR/M1 - Instrument noise problem/RF interferencenimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1
D060718.1NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating.nimmwrlosM1.b1, nimmwrtipM1.a1
D060927.1NIM/MWR/M1 - Sun in field of view of radiometernimmwrlosM1.b1


DQRID : D060419.4
Start DateStart TimeEnd DateEnd Time
01/15/2006000001/08/20070000
Subject:
NIM/MWR/M1 - Instrument noise problem/RF interference
DataStreams:nimmwrM1.00, nimmwrlosM1.b1, nimmwrtipM1.a1
Description:
Data are affected by intermittent spikes that become more frequent starting in March 2006. 
Spikes affect data mostly around 9 AM and 18:00 PM. The origin of the spikes is probably 
RF interference.
Measurements:nimmwrlosM1.b1:
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • MWR column precipitable water vapor(vap)
  • 31.4 GHz sky signal(sky31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • 23.8 GHz sky signal(sky23)
nimmwrM1.00:
  • null(Raw data stream - documentation not supported)
nimmwrtipM1.a1:
  • 31.4 GHz sky signal(tipsky31)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 23.8 GHz sky signal(tipsky23)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

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DQRID : D060718.1
Start DateStart TimeEnd DateEnd Time
03/01/2006000001/08/20070000
Subject:
NIM/MWR/M1 - Reprocessed: Recalibration to correct for occasional overheating.
DataStreams:nimmwrlosM1.b1, nimmwrtipM1.a1
Description:
The radiometer was intermittently thermally unstable resulting in poor calibrations for 
four brief time periods.  These data have been reprocessed to apply corrected calibrations. 
 The affected time periods were:

20060302-20060303
20060423-20060425
20060512-20060515
20060531-20060603
Measurements:nimmwrlosM1.b1:
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Mixer kinetic (physical) temperature(tkxc)
  • MWR column precipitable water vapor(vap)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • 23.8 GHz Blackbody signal(bb23)
  • (tknd)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz sky signal(sky23)
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz blackbody(bb31)
nimmwrtipM1.a1:
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 31.4 GHz blackbody(bb31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • 31.4 GHz sky signal(tipsky31)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 23.8 GHz Blackbody signal(bb23)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • 23.8 GHz sky signal(tipsky23)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Blackbody kinetic temperature(tkbb)
  • (tknd)

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DQRID : D060927.1
Start DateStart TimeEnd DateEnd Time
08/01/2006000008/31/20062300
Subject:
NIM/MWR/M1 - Sun in field of view of radiometer
DataStreams:nimmwrlosM1.b1
Description:
Around 12 pm every day between 8/1 and 8/31 there is an increase in the brightness 
temperature due to the sun being in the field of view of the radiometer.
Measurements:nimmwrlosM1.b1:
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • MWR column precipitable water vapor(vap)
  • Sky brightness temperature at 31.4 GHz(tbsky31)

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