DQRID : D061020.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/18/2006000011/22/20062359Does not affect quality
NSA/AERI/C1 - Reprocessed: Failed temp sensor affected calibration
DataStreams:nsaaerich1C1.b1, nsaaerich2C1.b1, nsaaerisummaryC1.b1
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%.
Retrieve reprocessed data set from ARM Archive.
  • mean_rad
  • elevatedLayerAirTemp700_705
  • elevatedLayerRadiance2282_2287
  • longwaveWindowAirTemp985_990
  • surfaceLayerRadiance2295_2300
  • elevatedLayerAirTemp2282_2287
  • elevatedLayerRadiance700_705
  • surfaceLayerAirTemp2295_2300
  • surfaceLayerRadiance675_680
  • surfaceLayerAirTemp675_680
  • shortwaveWindowAirTemp2510_2515
  • longwaveWindowRadiance985_990
  • shortwaveWindowRadiance2510_2515
  • mean_rad

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