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14 October 1996 IR-images propagation through the turbid atmosphere
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The paper discusses the salient features of the impulse response characteristics of IR channels of image transfer through the atmosphere (lambda equals 3.75 and 10.8 micrometer) obtained by solving the radiative transfer equation by the Mont-Carlo method. A distorting effect of horizontal photon diffusion on infrared images of the temperature-inhomogeneous Earth's surface recorded from space under conditions of a turbid atmosphere has been investigated. As an example, two different situations have been considered: remote measurements of the surface temperature near the dividing line between two large regions of the surface with different temperatures (for example, near a coastal line) and spaceborne detection of subpixel high-temperature sources. Results of simulation for a 3.75- micrometer channel have shown that in the first case, band zones are formed on both sides of the dividing line due to aerosol scattering, within which the measurement results may strongly depend on the geometry of observations, the value of the temperature gradient, and the degree of atmospheric turbidity. Aerosol scattering may have a marked effect on the quality of satellite data interpretation when estimating size and intensity of subpixel high-temperature sources.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vladimir V. Belov, Sergei V. Afonin, and Irina Y. Makushkina "IR-images propagation through the turbid atmosphere", Proc. SPIE 2828, Image Propagation through the Atmosphere, (14 October 1996);


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