Backscattering by Nonspherical Hydrometeors as Calculated by the Coupled-Dipole Method: An Application in Radar Meteorology

Clifton E. Dungey Directorate of Technology, Headquarters Air Weather Service, Scott Air Force Base, Illinois

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Craig F. Bohren Department of Meteorology, The Pennsylvania State University, University Park, Pennsylvania

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Abstract

The severest test of a theory of scattering by particles is how well it calculates scattering in the backward direction. The coupled-dipole method can be used for accurately calculating backscattering at 94 GHz by hexagonal ice crystals. Backscattering by columns is markedly different from that by plates, which indicates that it might be possible to infer size and shape distributions of ice crystals using recently developed millimeter wave radar.

Abstract

The severest test of a theory of scattering by particles is how well it calculates scattering in the backward direction. The coupled-dipole method can be used for accurately calculating backscattering at 94 GHz by hexagonal ice crystals. Backscattering by columns is markedly different from that by plates, which indicates that it might be possible to infer size and shape distributions of ice crystals using recently developed millimeter wave radar.

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