【摘要】 高空卷云是一种大范围发生的高空大气现象。文中对卷云冰晶粒子的物理特性进行了概要总结，用几何射线近似求解冰晶粒子的散射特性，计算了冰晶粒子对１ ．３１５ μｍ 光波的散射相矩阵、散射截面、吸收截面，并进行了讨论更多还原

【Abstract】 In this paper, a review of properties of cirrus is given. The knowledge of composition and structure of cirrus is described. Then, the geometric ray tracing method is proposed, which is first applied in this field by Cai and Liou. C L method is approximately valid because the ice crystal of cirrus is more larger than wavelength of the researched laser. This computation depends on the optics, which can give the scattering phase matrix of polarized light for the randomly oriented non spherical particle. As result, the matrix element of scattering of hexagonal ice crystal, the scattering cross sector and absorption cross sector is calculated.更多还原