Photon transport in vegetation canopies with anisotropic scattering Part IV. Discrete-ordinates/exact-kernel technique for two-angle photon transport in slab geometry

摘要: Abstract In this paper, we discuss a computational technique for photon transport in vegetation canopies involving anisotropic scattering. The exact kernel eliminates the need finite Legendre polynomial expansions and thus inherent expansion errors. scattering phase function (see Part I) now takes form of transfer matrix, whose elements are actual evaluated at discrete quadrature angles. To use non-expanded cross-sections calculations, modified discrete-ordinates method is formulated. proposed tested energy conservation its results compared with tabulated (reflection transmission) functions some standard solutions atmospheric studies. Finally, was used to study one-angle problem canopies.