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Proceedings Paper

Multiple scattering and the shape of the sky including molecules and aerosol particles (spherical and nonspherical)
Author(s): Ariel Cohen
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Paper Abstract

Solar light scattering from atmospheric layers is perceived by an observer as the background key. The shape of this background is built in the observer's eyes by the visibility distances in all slant directions. In an average day the atmosphere has a turbidity value in the vicinity of 2 implying that the average contribution to the scattered light by the air molecules is approximately equal to the scattering by the spherical and non-spherical particles in the atmosphere. Since the atmospheric air density and the particulate number density in the horizontal direction are both assumed to be constant whereas their values decreases in a slant direction, the resulting varying visibility distances in the various directions are shown to form a flat sky shape. The multiple scattering calculations are based on scattering functions for spherical and non-spherical particles. The basic approach which is used to handle the scattering of non-spherical particles, is discussed in part II of this presentation.

Paper Details

Date Published: 3 April 2003
PDF: 8 pages
Proc. SPIE 5059, 12th International Workshop on Lidar Multiple Scattering Experiments, (3 April 2003); doi: 10.1117/12.512333
Show Author Affiliations
Ariel Cohen, Hebrew Univ. of Jerusalem (Israel)

Published in SPIE Proceedings Vol. 5059:
12th International Workshop on Lidar Multiple Scattering Experiments
Christian Werner; Ulrich G. Oppel; Tom Rother, Editor(s)

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