Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..194v&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 194-197
Physics
Scientific paper
Accurate numerical solutions are presented for the radiation field in a semi-infinite, two-dimensional, plane-parallel, absorbing-emitting but non-scattering gray atmosphere subjected to cosine-varying collimated incident boundary radiation. We approximate the kernel of the integral equation for the emissive power by a sum of exponents. After this approximation the integral equation can be solved exactly. The solution contains the well-known Ambartsumian-Chandrasekhar H-function. This approach allowed us to find the accurate values for the emissive power and the radiative flux at arbitrary optical depths in the atmosphere. The calculations have shown that the radiative flux may have a maximum at certain values of the spatial frequency in the atmosphere and that the region, where the emissive power reaches a constant value, may lie very deep in the atmosphere.
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