项目名称: 星载SAR测雨的模型与反演算法研究
项目编号: No.61071185
项目类型: 面上项目
立项/批准年度: 2011
项目学科: 金属学与金属工艺
项目作者: 谢亚楠
作者单位: 上海大学
项目金额: 10万元
中文摘要: 本报告介绍了SAR成像的距离向和方位向分辨率,然后分析了SAR用于降雨测量的三维分辨率。 运用Mie理论和瑞利散射理论对球形气象目标的电磁散射特性进行了研究,并且利用基于有限积分法的CST软件求解了真实雨滴和融化冰粒的雷达散射截面。 从基本雷达方程出发,对雷达回波信号进行分析。雷达回波信号由面散射和体散射两部分组成,对其表达式进行了详细推导并且给出了将球面波简化为平面波的推导过程。 在对大量回波数据分析的基础上,提出用均值μ12289;方差σ12289;峰度α12289;偏度κ23545;PSAR归一化回波数据进行分段统计分析,获取降水分布特征值的有效方法,并且简要介绍了国外学者的研究。
中文关键词: 分辨率;电磁散射;雷达回波;降雨水平分布
英文摘要: This report introduce the along and across track resolution of SAR, analysis the three-dimensional resolution of SAR when used for rain measurement. The electromagnetic scattering characteristics of spherical meteorological objects are studied based on Mie theory and Rayleigh scattering theory. RCS of real raindrop and melting ice are solved using CST software based FIT (Finite Integral Technology). Make analyze and give detailed deduce process of radar reflected signal, which is composed with surface scattering and volume scattering. Give the deduce process of simplification of spherical wave to plane wave. Based on the analysis of a large number of echo data, this report propose the method of applying the mean value μvariance σkurtosis αkurtosis κo analyze the normalized echo data of PSAR. In this way, the eigenvalue of pricipitation distribution can be obtained,then introduces the research of foreign scholars.
英文关键词: electromagnetic scattering; radar reflected signal; rainfall horizonal distribution