Statistics – Computation
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jqsrt..55..181l&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 55, issue 2, pp. 181-189
Statistics
Computation
2
Radiative Transfer: Scattering, Radiative Transfer: Earth Atmosphere
Scientific paper
A parametric model of sky radiance distribution is developed using radiative transfer theory. The radiation field is divided into four components: single-scattering; double-scattering; quasi-multiple-scattering; and surface related component. The first three components are associated with zero surface reflectance. The single-scattering and double-scattering radiance are exactly calculated, and quasi-multiple scattering is fitted statistically from the numerical code DISORT based on the discrete-ordinate algorithm. Surface bidirectional reflectance is incorporated into the last component. Comparisons of this simple model with a numerical code DISORT as well as another parametric sky radiance model are made under different conditions of aerosol optical depth, asymmetry parameter in the phase function and surface reflectance. Results indicate that the present model is very accurate and computationally efficient.
Lewis Paul
Liang Shunlin
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