DQRID : D030730.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
04/15/2003000006/09/20031749Suspect
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Subject:
SGP/AERI/B4 - Intermittent Failure of LW detector
DataStreams:sgpaerisummaryB4.a1, sgpaerich1B4.a1, sgpaeriB4.00, sgpaeriengineerB4.a1
Description:
The amplifier gain for the long wave (LW) detector intermittently failed. The result was a 
decrease in LW responsivity by a factor of 2 whenever this occurred. The loss of 
responsivity will increase the noise of the LW data. The user will need to determine whether 
this increase in noise is significant enough to affect the data quality for their 
application. The amplifier rapidly changed from failed to working. When the amplifier was working 
the data are all green (good).
Suggestions: 
If the LW responsivity is greater than 0.8, the data can be considered green (good). 

To be safe the user can just select these data. For values of LW responsivity that are 
below this value, the user will have to determine if the extra noise affects data quality 
for their application
Measurements:sgpaerisummaryB4.a1:
  • ResponsivitySpectralAveragesCh1
  • surfaceLayerRadiance675_680
  • HBB2minNENEstimateNo2ch1
  • SkyNENCh1
  • elevatedLayerRadiance700_705
  • elevatedLayerAirTemp700_705
  • LWresponsivity
  • longwaveWindowRadiance985_990
  • longwaveWindowAirTemp985_990
  • SkyRadianceSpectralAveragesCh1
  • skyViewStdDevRadiance700_705
  • SkyVariabilityAveragesCh1
  • LWskyNEN
  • HBB2minNENEstimateNo1ch1
  • surfaceLayerAirTemp675_680
  • SkyRadianceSpectraAveragesCh1
  • HBB2minNENestimateNo1Ch1
  • skyViewStdDevRadiance985_990
  • ResponsivitySpectraAveragesCh1
  • SkyBrightnessTempSpectralAveragesCh1
  • HBB2minNENestimateNo2Ch1
  • LW_HBB_NEN
  • skyViewStdDevRadiance675_680
  • SkyNENch1
  • SkyUniformityCh1
more
sgpaeriB4.00:
  • Raw data stream - documentation not supported
more
sgpaerich1B4.a1:
  • standard_dev_mean_rad
  • mean_rad
more
sgpaeriengineerB4.a1:
  • elevatedLayerAirTemp700_705
  • longwaveWindowAirTemp985_990
  • surfaceLayerRadiance675_680
  • surfaceLayerAirTemp675_680
  • skyViewImaginaryRadiance675_680
  • skyViewImaginaryRadiance700_705
  • LW_HBB_NEN
  • skyViewStdDevRadiance985_990
  • HBBviewStdDevRadiance675_680
  • skyViewImaginaryRadiance985_990
  • ABBviewStdDevRadiance985_990
  • HBBviewStdDevRadiance700_705
  • ABBviewStdDevRadiance675_680
  • longwaveWindowRadiance985_990
  • ABBviewStdDevRadiance700_705
  • HBBviewStdDevRadiance985_990
  • skyViewStdDevRadiance675_680
  • ABBbottomTemp
  • skyViewStdDevRadiance700_705
  • LWskyNEN
  • elevatedLayerRadiance700_705
  • LWresponsivity
more

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