Abstract

Scattered light for preferentially oriented ice crystals is divided into specular and difiuse components where the specular scattering is created by horizontally oriented facets of ∞uttering crystals. The specular component for a ∞uttering thin plate modeling these crystals is found analytically as a 2D convolution of a geometric optics pattern depending only on ∞utter and an independent difiraction function. The geometric optics pattern is explicitly expressed through the probability density for particle tilts and the difiraction function is taken in the Fraunhofer difiraction approximation. Certain possibilities to retrieve both ∞utter parameters and particle sizes from the specular patterns are discussed.

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