Data Quality Reports for Session: 126562 User: heygster Completed: 03/04/2010

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D090114.2NSA/MWR/C1 - Incorrect brightness temperatures and retrievalsnsa5mwravgC1.c1, nsamwrlosC1.b1, nsamwrtipC1.a1
D090417.1NSA/MWR/C1 - RFI screening testnsamwrlosC1.b1, nsamwrtipC1.a1
D090417.5NSA/MWR/C1 - High noise in 23.8-GHz channelnsamwrlosC1.b1, nsamwrtipC1.a1


DQRID : D090114.2
Start DateStart TimeEnd DateEnd Time
12/09/2008000012/09/20081800
Subject:
NSA/MWR/C1 - Incorrect brightness temperatures and retrievals
DataStreams:nsa5mwravgC1.c1, nsamwrlosC1.b1, nsamwrtipC1.a1
Description:
The brightness temperatures and retrieved PWV and LWP show a sudden jump and have values 
that are too high. The suddenly jump back to normal at around 1800 UTC. All other 
parameters seem reasonable so the cause of the jump may just be due to accumulation of either 
snow or melting ice on the radome.
Measurements:nsa5mwravgC1.c1:
  • MWR column precipitable water vapor(vap)
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Sky brightness temperature at 31.4 GHz(tbsky31)
nsamwrlosC1.b1:
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • MWR column precipitable water vapor(vap)
  • Ambient temperature(tkair)
nsamwrtipC1.a1:
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
  • Ambient temperature(tkair)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)

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DQRID : D090417.1
Start DateStart TimeEnd DateEnd Time
04/15/2009210004/15/20092300
04/16/2009171504/16/20092200
Subject:
NSA/MWR/C1 - RFI screening test
DataStreams:nsamwrlosC1.b1, nsamwrtipC1.a1
Description:
The instrument was covered with a shield to test the effect on the RF interference that is 
affecting the measurements since February. The test was performed on 4/15 and 4/16 for a 
few hours.
Measurements:nsamwrlosC1.b1:
  • Sky brightness temperature at 31.4 GHz(tbsky31)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • 23.8 GHz sky signal(sky23)
  • Mixer kinetic (physical) temperature(tkxc)
  • MWR column precipitable water vapor(vap)
  • Blackbody kinetic temperature(tkbb)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Ambient temperature(tkair)
  • 23.8 GHz Blackbody signal(bb23)
  • 31.4 GHz sky signal(sky31)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • IR Brightness Temperature(ir_temp)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • (tknd)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz blackbody(bb31)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Averaged total liquid water along LOS path(liq)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Actual elevation angle(actel)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual Azimuth(actaz)
nsamwrtipC1.a1:
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz blackbody(bb31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz goodness-of-fit coefficient(r31)
  • Ambient temperature(tkair)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • (tknd)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Actual elevation angle(actel)
  • Blackbody kinetic temperature(tkbb)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
  • Actual Azimuth(actaz)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 23.8 GHz Blackbody signal(bb23)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 31.4 GHz sky signal(tipsky31)
  • 23.8 GHz sky signal(tipsky23)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)

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DQRID : D090417.5
Start DateStart TimeEnd DateEnd Time
02/13/2009000010/15/20091800
Subject:
NSA/MWR/C1 - High noise in 23.8-GHz channel
DataStreams:nsamwrlosC1.b1, nsamwrtipC1.a1
Description:
Starting approximately on February 13 the MWR experienced high level of noise in the 23.8 
GHz channel. The spikes became more prominent around Feb 17 and increased after that date 
as well. The cause of the interference was identified as the nearby MWRP on Oct 13 and 
the instruments were realigned.
Measurements:nsamwrlosC1.b1:
  • 23.8 GHz sky signal(sky23)
  • MWR column precipitable water vapor(vap)
  • Sky brightness temperature at 23.8 GHz(tbsky23)
nsamwrtipC1.a1:
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • 23.8 GHz sky signal(tipsky23)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)

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