Henyey-greenstein phase function

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Henyey–Greenstein phase function

A single-parameter analytic form for an anisotropic, scattering phase function.

The Henyey–Greenstein phase function is written as
where θ is the scattering angle. The parameter g is conveniently equal to the asymmetry factor.

Henyey, L. G., and J. L. Greenstein 1941. Astrophys. J.. 93. p.70.

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