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In this study two-flux model for radiative transfer is examined in some details, especially, concerned with the determination of absorption and backscattering coefficients of turbid media. A ratio of ...the first moment of radiative intensity to the zeroth one appeared in the two-flux model is determined through analytical considerations for two limiting cases, i.e., ω＝0 and ω＝1 and is fixed for 1.0 to low albedos (ω≦0.7) and 2/3 to high albedos (ω＞0.7). Some directional transmittances are compared with the hemispherical one (T_F) and it is found that I(τ_0,40)/I_0 is the best approximation to T_F. Furthermore inversions for the exact transmittance data are done and it is shown that in case of I(τ_0,40)I_0 absorption and backscattering coefficients can be determined within a factor of 0.5 to 2 and one of 1 to 150, respectively.続きを見る
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