SPECPR Users’ Manual Page 14.1
RADIATIVE TRANSFER ROUTINES
14.1 Introduction The radiative transfer routines allow you to compute a reflectance spectrum given the optical constants of a material, compute reflectance spectra of mixtures of materials given their optical constants, invert a reflectance spectrum to absorption coefficient given the index of refraction spectrum, and other computations. All computations can be done at specific grain sizes and viewing geometries (including geometric albedo). Because of the memory requirements, the radiative transfer routines have been split from the specpr program, and are now called "radtran." See the radtran user’s manual for details.
NOTE: the radtran manual is currently in preparation.