Vol. 3, issue 09, article # 11

pdf Budak V. P., Sarmin S. E. Solution of the radiation transfer equation by the method of spherical harmonics in the small-angle modification. // Atmospheric and oceanic optics. 1990. V. 3. No. 09. P. 898-903.
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Abstract:

A small-angle modification of the method of spherical harmonics for solving the radiation transfer equation is developed. The method is effective for calculating light fields in turbid media with anisotropic scattering. It is shown that the previously used forms of the small-angle approximation are a particular case of the approach developed in this paper.