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Spectral reflectance of particulate materials: a Monte Carlo model including asperity scattering

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Abstract

A six-flux Monte Carlo approach to modeling of the reflectance of particulate surfaces is presented that includes the scattering as well as absorption of asperities of the constituents. For spherical particles ≳λ, the forward, backward, and transverse scattering is calculated. Then using a radiative transfer model, the reflection of a particulate surface may be determined. An application of the theory is made to four particle size ranges of a nonhomogeneous, multiconstituent sample—the Bruderheim meteorite—of olivine–hypersthene chondritic composition. The theoretical values of reflectance, using the experimentally determined optical complex indices of refraction, compare well with the experimental reflectance observations.

© 1978 Optical Society of America

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