利用CSSM进行多频InSAR相位融合及DEM重构  

Interferometric Phase Fusion and DEM Reconstruction Method with CSSM for Multi-frequency InSAR Systems

作　　者：张森[1] 唐劲松[1] 杨海亮[1] 陈鸣[1] 

机构地区：[1]海军工程大学电子工程学院,武汉市解放大道717号4301033

出　　处：《武汉大学学报（信息科学版）》2010年第3期328-333,共6页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2007AA091101)

摘　　要：提出了一种基于相关信号子空间处理方法(coherent signal subspace method,CSSM)的多频带InSAR自适应DEM重构方法,采用广义像素模型对各频带InSAR信号建模,再用CSSM中构造聚焦矩阵的思想将多频带相关矩阵变换到参考频率上,然后采用子空间投影方法来估计高程信息。该方法可以在图像配准精度很差(可以允许达到一个分辨单元)的条件下得到稳健的估计性能,仿真数据和SIR-C实际雷达数据验证了此方法的有效性。A DEM reconstruction method based on CSSM （coherent signal subspace method） is proposed for multi-frequence InSAR systems. This method transforms the correlation ma- trices at many frequency bins into one general correlation matrix at one focusing frequency using a transformation matrix （focusing matrix）, then estimates the elevation using subspace projecting method. The method can provide more accurate estimation of the height even when the coregistration error reaches one pixel than previous methods. The effectiveness and robustness of the method is verified by simulated data and SIR-C real data.

关 键 词：INSAR 配准误差 多频 广义像素模型 DEM重构 

分 类 号：P237.3[天文地球—摄影测量与遥感]