Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2828..409b&link_type=abstract
Proc. SPIE Vol. 2828, p. 409-420, Image Propagation through the Atmosphere, J. C. Dainty; Luc R. Bissonnette; Eds.
Physics
Scientific paper
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.
Afonin Sergei V.
Belov Vladimir V.
Makushkina Irina Y.
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