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Proceedings Paper

Investigation of backscattered radiation by a crystal cloud to bistatic polarization laser sounding
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Paper Abstract

The crystal clouds extend above a mostly surface of the Earth. Their structure is submitted by a huge variety of forms and sizes ofparticles. According to conditions of crystal growth, one or other kind of particles prevails in a cloud'. The particles of the extended form such as polyhedrons, needles, plates were observed in all atmospheric formations essentially. The character of movement of particles in quiet layers of an atmosphere is caused by their aerodynamic properties and gravitational forces. Plate crystals are more tolerant on position in space among the extended formed particles. A behaviour of atmospheric particles depends on character of movement of airflow. The reorientation of each crystal will be determined by a difference of vectors of speed of its fall and speed of movement of a wind. All powerful fields influence on a circulation of airflow. A deep heterogeneity of the Earth, a breaks of geological structures, a fluctuation in magneticsphere, a electrical field influence on formation of atmospheric structure. As a rule, the presence of a powerful field is favourable to a steady position of particles in space. The numerous investigations have shown, that the ice clouds in the greater part consist of systems of particles of some primary orientation. The mechanism of light scattering on such crystals differs appreciably from scattering on spheres or chaotic oriented particles. Feature of light scattering by nonspherical particles is obviosly expressed anisotropy. It is possible to observe a anomalous optical phenomena in an atmosphere, as a consequence of radiation scattering on preferred oriented crystals.

Paper Details

Date Published: 19 July 1999
PDF: 2 pages
Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); doi: 10.1117/12.354989
Show Author Affiliations
Olga Vladimirov Shefer, Tomsk State Univ. (Russia)

Published in SPIE Proceedings Vol. 3749:
18th Congress of the International Commission for Optics
Alexander J. Glass; Joseph W. Goodman; Milton Chang; Arthur H. Guenther; Toshimitsu Asakura, Editor(s)

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