Comparison Of Millimeter-Wave Scattering: A Stellar Dendrite VS. Disk And Spheroids

Sean G. O'Brien; George H. Coedecke

doi:10.1117/12.976166

20 November 1985 Comparison Of Millimeter-Wave Scattering: A Stellar Dendrite VS. Disk And Spheroids

Sean G. O'Brien, George H. Coedecke

Proceedings Volume 0540, Southwest Conf on Optics '85; (1985) https://doi.org/10.1117/12.976166
Event: 1985 Albuquerque Conferences on Optics, 1985, Albuquerque, United States

Abstract

A finite-element model was used to compute differential and total scattering cross-sections for polarized millimeter-wave radiation incident upon a model stellar dendrite ice crystal. Construction of equivalent cylindrical disk and oblate spheroid scatterers was then attempted with the Biot-Arago, Lorentz-Lorenz, and Pruggemann effective medium models. Edge-on and broadside incidence cases were employed in the comparison. Good agreement of scattering properties was found for equivalent oblate spheroids with maximum linear dimensions and aspect ratios equal to those of the dendrite. A two-step effective medium averaging process involving the Pruggemann model produced oblate spheroids which closely imitated the scattering properties of the dendrite.

Citation Download Citation

Sean G. O'Brien and George H. Coedecke "Comparison Of Millimeter-Wave Scattering: A Stellar Dendrite VS. Disk And Spheroids", Proc. SPIE 0540, Southwest Conf on Optics '85, (20 November 1985); https://doi.org/10.1117/12.976166

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