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A High Altitude Infrared Radiance Model
Final rept. 1 Jun 1972-30 Apr 1974
VISIDYNE INC BURLINGTON MA
Pagination or Media Count:
A knowledge of the natural infrared radiance originating in the earths upper atmosphere is of interest for systems design, military surveillance and the advancement of knowledge about physical processes in the upper atmosphere. A physical model that includes experimental data on and theoretical estimates of excitation processes that lead to emission of infrared radiation has been implemented in a computer program that computes infrared radiances for an earth limb viewing geometry. The nominal spectral region of this study lies between 2.7 and 25 micrometers and emphasis is placed on radiation originating at altitudes between 70 and 500 km. The physical model is described, with emphasis on the changes required in extending its usefulness. Application of the computer program is described and estimates are given of uncertainties in results due to assumptions made in the model and lack of data on actual atmospheric composition.
APPROVED FOR PUBLIC RELEASE