小旋转椭球粒子群旋转轴取向呈正态分布时的后向散射特性

Back-scatterring cross section of poly-dispersed small spheroid particles are studied under the condition that the distribution of their rotatory axes is Gaussian. The numerical method for integration is used for calculation of back-scatterring cross-sections as a function of distribution parameters. The results obtained for zero-variance and unlimited variance are consistent with references for identical distribution and uniform distribution, respectively. The relations of the attenuation cross section with wave length and distribution parameters such as expectation are also studied. The results are useful for modeling atmospheric radiative transfer and improving microwave remote sensing of clouds and precipitation.