基于SAR测量的改进型VIE降雨反演算法  

Improved VIE Rainfall Retrieval Algorithm Based on SAR Measurements

作　　者：郑和[1] 谢亚楠[1] 万智龙[1] 刘文渊[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2012年第5期464-469,共6页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61071185);上海市重点学科建设资助项目(S30108);上海市科委重点实验室资助项目(08DZ2231100);上海市科委科技攻关计划资助项目(10511501702)

摘　　要：提出一种新型降雨反演算法,该算法是对沃尔塔积分方程(Volterra integral equation,VIE)降雨反演算法的改进.首先,对雷达接收到的回波数据进行预处理,得到降雨起点和降雨宽度等信息;然后,仅利用沃尔塔积分反演算法处理少量特定区域,通过深度挖掘数据变化的规律来分析得出降雨分布的类型和降雨速率;最后,根据通常研究对象的分布对称性,结合已经获得的信息反演得到整个区域的降雨分布情况.通过仿真结果可知,该算法高效、计算速度快,并且具有较高的精度.This paper proposes a new type of rainfall retrieval algorithm, which improves the method using the Voherra integral equation （VIE）. The proposed algorithm makes pre-analysis on the data received by synthetic aperture radar to get information such as the rainfall start point and the scope of the rain. The VIE retrieval algorithm is then applied in a short distance to get information of the rain distribution. Further analysis is then made on the information obtained in the previous step to find parameters such as shape of the rain and the rain rate. According to the most commonly studied rainfall distributions that are symmetric, the rainfall distribution is obtained. Simulation results show that the proposed algorithm is effective and efficient, with high accuracy.

关 键 词：反演算法 沃尔塔积分方程改进算法 面向统计反演模型 降雨 合成孔径雷达 

分 类 号：P435[天文地球—大气科学及气象学]