Publication Abstracts

Mishchenko and Macke 1998

Mishchenko, M.I., and A. Macke, 1998: Incorporation of physical optics effects and computation of the Legendre expansion for ray-tracing phase functions involving δ-function transmission. J. Geophys. Res., 103, 1799-1805, doi:10.1029/97JD03121.

The standard geometric optics (GO) technique predicts that the phase function for large nonspherical particles with parallel plane facets (e.g., hexagonal ice crystals) should have an infinitely narrow δ-function transmission peak caused by rays transmitted (refracted) in exactly the forward scattering direction. However, exact T-matrix computations and physical considerations based on the Kichhoff approximation suggest that this peak is an artifact of GO completely ignoring physical optics effects and must be convolved with the Fraunhofer pattern, thereby producing a phase function component with an angular profile similar to the standard diffraction component. This convolution can be performed with a simple procedure which supplements the standard ray-tracing code and makes the computation of the phase function and its Legendre expansion both more physically realistic and more accurate.

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BibTeX Citation

@article{mi02100q,
  author={Mishchenko, M. I. and Macke, A.},
  title={Incorporation of physical optics effects and computation of the Legendre expansion for ray-tracing phase functions involving δ-function transmission},
  year={1998},
  journal={J. Geophys. Res.},
  volume={103},
  pages={1799--1805},
  doi={10.1029/97JD03121},
}

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RIS Citation

TY  - JOUR
ID  - mi02100q
AU  - Mishchenko, M. I.
AU  - Macke, A.
PY  - 1998
TI  - Incorporation of physical optics effects and computation of the Legendre expansion for ray-tracing phase functions involving δ-function transmission
JA  - J. Geophys. Res.
VL  - 103
SP  - 1799
EP  - 1805
DO  - 10.1029/97JD03121
ER  -

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