双视向补偿最佳入射角组合研究  

Optimal Incidence Angle Pair Selection for Dual-aspect Compensation in High Resolution SAR Data

作　　者：王国军[1,2] 邵芸[1] 万紫[1,3] 张风丽[1] 

机构地区：[1]中国科学院遥感应用研究所遥感国家重点实验室,北京100101 [2]中国科学院研究生院,北京100049 [3]浙江省水利河口研究院,杭州310020

出　　处：《国土资源遥感》2012年第4期48-54,共7页Remote Sensing for Land & Resources

基　　金：中国科学院知识创新工程重要方向项目(编号:KZCX2-EW-320);国家自然科学基金项目(编号:41001213);中国科学院知识创新工程青年人才领域前沿项目(编号:Y0S04400KB)共同资助

摘　　要：为了解决高分辨率合成孔径雷达双视向补偿的最佳入射角组合问题,提出了一种基于数据模拟的最优化选择方法。该方法利用DEM数据模拟2个视向不同入射角下的叠掩和阴影掩模图像,用补偿效果作为评价函数选择最佳的入射角组合。将该方法应用于地形平缓、适中和陡峭3个实验区的结果表明,该方法可以快速有效地获得最佳入射角组合,为双视向补偿应用中的SAR图像数据订购提供了科学依据,是SAR图像双视向补偿不可或缺的环节。In the dual-aspect compensation procedure,the best compensated result occurs under the condition of optimal incidence angle pair,which varies with terrain.Nevettheless,the problem as to how to obtain this pair remains unsolved.To solve this problem,this paper proposes a new method in search for the optimal incidence angle pair based on simulation.Firstly,DEM data are used to produce the layover and shadow mask images at different incidence angles from two different aspect directions respectively.Then from these images,the optimal incidence angle pair was searched out to obtain the best compensating result.On such a basis,the best incidence angle pairs in three areas of different topographic condition for the ＂dual-aspect compensation＂ method were given by experiment and the effects were analyzed.The results show that,with this method,the incidence angle pair could be obtained easily and effectively.The method can therefore guide the users to order the best SAR data when they use the dual-aspect compensation in mountainous areas,and this is the essential step in dual-aspect compensation.

关 键 词：高分辨率SAR 双视向补偿 叠掩阴影掩模图像 入射角组合 

分 类 号：O435.1[机械工程—光学工程]