Abstract

This paper presents an analysis of the contribution of various IR-attenuation mechanisms when the transmittance of oblique atmospheric tracks is being determined. It is shown that, under the conditions of an arid zone, the existing models of aerosol attenuation substantially underestimate its value in the long-wavelength section. Algorithms are developed for rapidly computing the transmittance and the intrinsic thermal radiation of the atmosphere on an oblique track, taking into account the specific meteorological conditions. Agreement with the experimental data is achieved when multimode models of the aerosol distribution in the near-earth layer are used. The transmission-calculation error has been estimated. A comparison of the calculated transmission and emission with the results obtained by means of known calculational methods is presented. A developed software complex is used in creating apparatus for monitoring the optical characteristics of oblique tracks.

© 2014 Optical Society of America

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