辐射传输中的相函数展开方法研究

Expanding Methods of Phase Function of the Radiative Transfer

从辐射传输方程中相函数的展开方法出发,分别介绍了δ-M展开法和δ-fit展开法,并对这两种相函数展开方法进行了比较。结果表明,在相函数展开中,当所取勒让德多项式的阶数相同时,δ-M法的图像始终在真实相函数附近波动,始终无法逼近真实的相函数的值,而δ-fit法符合较好。

Based on the expanding method of phase function of the radiative transfer equation, the δ-M method and the δ-fit method are presented. The difference of the two methods is studied. The simulation results show that in the expanding of phase function, and at the same ranks of Legendre polynomial, the curve of the δ-M method always fluctuates to the true curve of the phase function, however, the curve of the δ-fit method accords with it.