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Backscattering cross sections of model ice crystal aggregates are computed at 35.6 GHz using the generalized multiparticle Mie (GMM) method and compared against a commonly used equivalent dielectric model (also referred to as the “soft sphere” or the “bulk” model). It is shown that the bulk model underestimates the backscattering cross sections by 7 to 20 dB over aggregate sizes from 3 to 19 mm. This...
Ice crystal aggregates and their melting process are modeled with a new approach for determining their microwave scattering characteristics and are compared with those obtained using effective dielectric constant representations. The aggregates are constructed from columnar crystals of random lengths (with the width being a function of the length), which are composed of a string of touching ice spheres...
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