基于半无限均质分层介质的双向反射率函数模型（Mishchenko）的精确数值解，为Fortran语言代码。该均匀介质由任意形状，随机取向的颗粒构成。该双向反射率分布函数适用于土壤和雪/冰。文件spher.f 借助于Lorenz-Mie理论计算多分散球形颗粒的Legendre扩散系数。文件refl.f 计算反射率函数的傅立叶组分。而interp.f 计算任意太阳—传感器条件下双向反射率函数。-Semi-infinite homogeneous layered media based on bi-directional reflectance function model (Mishchenko) the exact numerical solution for the Fortran language code. The homogeneous medium of arbitrary shape by the random orientation of particles. The bidirectional reflectance distribution function for soil and snow/ice. File spher.f calculated by means of Lorenz-Mie theory of the Legendre polydisperse diffusion coefficient of spherical particles. File refl.f calculate the Fourier components of reflectance functions. The calculation of any interp.f sun- under the bidirectional reflectance sensor function.