Radiative transfer calculated from a Markov chain formalism

Details Radiative transfer calculated from a Markov chain formalism Radiative transfer calculated from a Markov chain formalism

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...219.1058e&link_type=abstract

Astrophysical Journal, Part 1, vol. 219, Feb. 1, 1978, p. 1058-1067.

Statistics

Computation

7

Atmospheric Models, Markov Chains, Planetary Atmospheres, Radiative Transfer, Asteroids, Diffuse Radiation, Monte Carlo Method

Scientific paper

The theory of Markov chains is used to formulate the radiative transport problem in a general way by modeling the successive interactions of a photon as a stochastic process. Under the minimal requirement that the stochastic process is a Markov chain, the determination of the diffuse reflection or transmission from a scattering atmosphere is equivalent to the solution of a system of linear equations. This treatment is mathematically equivalent to, and thus has many of the advantages of, Monte Carlo methods, but can be considerably more rapid than Monte Carlo algorithms for numerical calculations in particular applications. We have verified the speed and accuracy of this formalism for the standard problem of finding the intensity of scattered light from a homogeneous plane-parallel atmosphere with an arbitrary phase function for scattering. Accurate results over a wide range of parameters were obtained with computation times comparable to those of a standard 'doubling' routine. The generality of this formalism thus allows fast, direct solutions to problems that were previously soluble only by Monte Carlo methods. Some comparisons are made with respect to integral equation methods.

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