Data Quality Reports for Session: 103510 User: jdelamer Completed: 01/04/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D061020.2NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibrationnsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1


DQRID : D061020.2
Start DateStart TimeEnd DateEnd Time
10/18/2006000011/22/20062359
Subject:
NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration
DataStreams:nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1
Description:
On 18 Oct 2006, a thermistor that measures the temperature of the blackbody support 
structure failed, resulting in erroneously high values.  This measurement, which is captured by 
the field "BBsupportStructureTemp", provides the temperature of the radiance that is 
reflected into the blackbody (i.e., captured by the field "calibrationAmbientTemp"), and 
thus the calibrated radiance (the field "mean_rad") was incorrect and outside the ARM 
specification that the AERI data should be absolutely calibrated to within 1% of the ambient 
radiance.  The broken thermistor was fixed on 22 Nov 2006.

Fortunately, since the emissivity of the blackbodies is so high, absolute accuracy of the 
calibrationAmbientTemp is not required but should be within a few degrees.  The radiance 
data have been recalibrated using the ambient blackbody temperature (the field 
"calibrationCBBtemp") as a surrogate of the calibrationAmbientTemp. Historically, the 
calibrationAmbientTemp and calibrationCBBtemp measurements have been within 1-2 deg. As a result of 
this recalibration, the radiance data are now absolutely calibrated to better than 1%.
Measurements:nsaaerich2C1.b1:
  • Downwelling radiance interpolated to standard wavenumber scale(mean_rad)

nsaaerisummaryC1.b1:
  • Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
  • Longwave elevated air brightness temperature from radiance average (700_705
    cm^-1)(elevatedLayerAirTemp700_705)
  • Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
  • Shortwave surface air brightness temperature from radiance average (2295_2300
    cm^-1)(surfaceLayerAirTemp2295_2300)
  • Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
  • Shortwave elevated air brightness temperature from radiance average (2282_2287
    cm^-1)(elevatedLayerAirTemp2282_2287)
  • Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
  • Longwave surface air brightness temperature from radiance average (675_680
    cm^-1)(surfaceLayerAirTemp675_680)
  • Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
  • Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
  • Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
  • Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)

nsaaerich1C1.b1:
  • Downwelling radiance interpolated to standard wavenumber scale(mean_rad)


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