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

Olga Vladimirov Shefer

doi:10.1117/12.354989

19 July 1999 Investigation of backscattered radiation by a crystal cloud to bistatic polarization laser sounding

Olga Vladimirov Shefer

Proceedings Volume 3749, 18th Congress of the International Commission for Optics; (1999) https://doi.org/10.1117/12.354989
Event: ICO XVIII 18th Congress of the International Commission for Optics, 1999, San Francisco, CA, United States

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.

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Olga Vladimirov Shefer "Investigation of backscattered radiation by a crystal cloud to bistatic polarization laser sounding", Proc. SPIE 3749, 18th Congress of the International Commission for Optics, (19 July 1999); https://doi.org/10.1117/12.354989

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KEYWORDS

Crystals

Clouds

Atmospheric particles

Polarization

Laser crystals

Scattering

Backscatter

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