Comparison of modelled and empirical atmospheric propagation dataThe radiometric integrity of TM thermal infrared channel data was evaluated and monitored to develop improved radiometric preprocessing calibration techniques for removal of atmospheric effects. Modelled atmospheric transmittance and path radiance were compared with empirical values derived from aircraft underflight data. Aircraft thermal infrared imagery and calibration data were available on two dates as were corresponding atmospheric radiosonde data. The radiosonde data were used as input to the LOWTRAN 5A code which was modified to output atmospheric path radiance in addition to transmittance. The aircraft data were calibrated and used to generate analogous measurements. These data indicate that there is a tendency for the LOWTRAN model to underestimate atmospheric path radiance and transmittance as compared to empirical data. A plot of transmittance versus altitude for both LOWTRAN and empirical data is presented.
Document ID
19850040527
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Schott, J. R. (Rochester Inst. of Tech. NY, United States)
Biegel, J. D. (Rochester Institute of Technology Rochester, NY, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Geophysics
Meeting Information
Meeting: Infrared technology IX
Location: San Diego, CA
Start Date: August 23, 1983
End Date: August 25, 1983
Sponsors: SPIE - International Society for Optical Engineering