重轨InSAR平地干涉相位特性研究  

Study of characteristics of reference phase in repeat orbit InSAR

作　　者：刘广[1] 郭华东[1] Ramon Hanssen 岳焕印[2] 范景辉[1] 

机构地区：[1]中国科学院遥感应用研究所,遥感科学国家重点实验室,北京100101 [2]中国科学院电子学研究所,微波成像技术国家级重点实验室,北京100080 [3]Delft University of Technology, The Netherlands 2629 HS

出　　处：《高技术通讯》2008年第4期408-413,共6页Chinese High Technology Letters

基　　金：863计划(2003AA135080);KNAW-CAS联合博士生培养项目;中科院遥感所遥感科学国家重点实验室基金资助项目

摘　　要：鉴于平地干涉相位的补偿是重轨合成孔径雷达干涉测量(InSAR)的重要环节以及平地干涉相位特性对于 InSAR 处理过程中的参数选择和基线重估计的重要意义,本文针对不同参考面对平地干涉相位特性的影响以及如何利用平地干涉相位特性实施干涉基线重估计的问题进行了研究,从理论上推导出了参考面为平面和球面情况下平地干涉相位以及平地干涉相位频率的标量表示方法,对平面、球面和 WGS84椭球面三种不同参考面所对应的平地干涉相位特性进行了对比分析,给出了利用平地干涉相位和平地干涉相位频率方法进行干涉基线重估计的算法理论。研究表明,利用平地干涉相位特性可以实施干涉基线重估计,而考虑到参考面选择对平地干涉相位的影响,在进行干涉处理过程中必须选择适当的参考面。In consideration of the importance of reference phase compensation to repeat orbit SAIl intefferometry and the signifi- cance of the reference phase to parameter selection and baseline reestimation in InSAR processing, the effect of reference surface difference that caused reference phase change is studied as well as the method of baseline reestimation. This paper gives out the analytical form of the reference phase and reference phase frequency in different reference surface, studies the difference of the reference phase and reference phase frequency characteristic and at last analyses the possible methods in baseline reestimation using reference phase characteristic. The paper also setup the theoretic basis for baseline reestimation based on reference phase characteristic. The study shows that the baseline reestimation could be achieved by utilizing the characteristics of reference phase, and the proper surface of reference phase must be selected since different surface of reference phase will cause different reference phase.

关 键 词：平地干涉相位 平地干涉相位频率 平地相位参考面 基线重估计 

分 类 号：TN958[电子电信—信号与信息处理]