一种PSInSAR干涉测量公共主影像选择新方法  

A New Optimization Selection Method of Common Master Image for PSInSAR Interferometry

作　　者：刘利敏[1] 宫辉力[2,3] 余洁[1,2,3] 陈蓓蓓[2,3] 

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079 [2]首都师范大学资源环境与旅游学院,北京100048 [3]首都师范大学资源环境与地理信息系统北京市重点实验室,北京100048

出　　处：《武汉大学学报（信息科学版）》2015年第12期1594-1599,1612,共7页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2011AA120404);国家自然科学基金资助项目(41130744;41171335);国家973计划资助项目(2012CB723403);北京市教委科研基地建设资助项目~~

摘　　要：在PSInSAR干涉测量技术中,主影像的选择直接影响后续的形变相位提取及沉降信息解算。在综合考虑空间垂直基线、时间基线和多普勒中心频率对影像去相干影响的基础上,将三因素的相干性测度映射到三维空间,构成三个质点,通过对三质点的质心的研究来衡量三因素对影像相干性的综合影响,构建一种新的主影像选择模型。以2003~2009年北京地区28景ENVISAT ASAR影像为试验数据,分别采用该模型及综合最大相关系数模型进行主影像选择,并进行实际干涉处理,以生成干涉图及相干系数均值,对两种方法主影像选取结果进行定量评价。结果表明,与直接以去相干因素的相干测度乘积构建的综合相关系数模型相比,该方法选取的主影像更为合理,与其他辅影像总体干涉性更好。In PSInSAR technique which based on temporal analysis,the optimization selection of master image can directly affects the subsequent results of the deformation phase extraction and subsidence information calculation.In this paper,considering the different interferometric decoherence factors of image pairs such as space vertical baseline,temporal baseline and Doppler centroid frequency,calculate the three decoherence factors in numerical measure.three factors are mapped to three-dimensionalspace and regarded as three particles,three particle considered one object,through the comprehensive study of centroid of the object to measure the impact of three particles on the coherence between the images,and then build a new master image optimization selection model Respectively,using the proposed model and the integrated correlation coefficient model to take master image selection experiment for 28 scene images acquired by ENVISAT ASAR from 2003 to 2009over Beijing.To verify the master image selection by different model,separately use the two selected result to interfere with the other images,take the interferogrames generated and mean correlation coefficient as quantitative evaluation.The results show：Compared with integrated correlation coefficient model,the master image selected by this method proposed to is more reasonable,and the overall interference between other auxiliary images is better,meanwhile,and the model proposed is stable.

关 键 词：时间基线 空间有效基线 多普勒中心频率 主影像 综合相干测度 

分 类 号：TP237[自动化与计算机技术—检测技术与自动化装置] TP753[自动化与计算机技术—控制科学与工程]