一种基于胡克定律的PS-InSAR公共主影像选取新方法  

A new method based on Hooke’s law to select common master image for PS-InSAR

作　　者：法炜 余洁[1,2,3] 韩丽华 王彦兵[1,2,3] FA Wei;YU Jie;HAN Lihua;WANG Yanbing(College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China;State Key Laboratory Incubation Base of Urban Environmental Process and Digital Simulation,Capital Normal University,Beijing 100048,China;Key Laboratory of 3DInformation Acquisition and Application,MOE,Capital Normal University,Beijing 100048,China;Land Satellite Remote Sensing Application Center of MNR,Beijing 100048,China)

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]首都师范大学城市环境过程与数字模拟国家重点实验室培育基地,北京100048 [3]首都师范大学三维信息获取与应用教育部重点实验室,北京100048 [4]自然资源部国土卫星遥感应用中心,北京100048

出　　处：《测绘科学》2023年第1期70-80,共11页Science of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41671417)

摘　　要：针对现有的PS-InSAR公共主影像选取方法未考虑时间基线、空间垂直基线和多普勒质心频率基线之间相关性对影像相干性影响的问题,该文基于物理学领域的胡克定律提出了一种利用三维弹力结构模型实现PS-InSAR公共主影像选取的新方法。模型依据三基线间的余弦夹角构造基线向量,将3个失相干因素的相干性测度进行三维映射以构建三维弹力空间,通过研究弹力大小和方向的变化实现主影像的选取。为验证三维弹力结构模型的有效性,论文选用Sentinel 1A和ENVISAT ASAR两种数据源,分别利用三维弹力结构模型、三基线和最小模型和综合相关函数模型进行主影像选取和干涉处理。研究结果表明:相较于另外两个模型,该文提出的三维弹力结构模型得到的干涉图干涉条纹清晰,相干系数均值更大,相干系数值较大的像元占比更高,采用相干系数法得到的PS点数量更多,形变反演精度较高,因此三维弹力结构模型能够有效应用于PS-InSAR公共主影像的选取。Aiming at the problem that the existing PS-InSAR common master image selection methods do not consider the influence of the correlation between the temporal baseline,perpendicular baseline and Doppler centroid frequency baseline on the image coherence,this study proposes a new method based on the Hooke’s Law for PS-InSAR common master image selection.The model constructs the baseline vector according to the cosine Angle between the three baselines.And the coherence measure of the three decoherence factors was mapped to construct a 3D elasticity space,then the main image was selected by studying the size and direction of the elasticity.To verify the validity of the 3D elasticity structure model,the common master image selection and interference processing of Sentinel 1A images and ENVISAT ASAR images were carried out by using the 3D elasticity structure model,the minimize baseline sum model and the integrated correlation coefficient model,respectively.The results show that the interferogram stripe obtained by the 3D elasticity structure model are more obvious,the mean of the coherence coefficients is the largest,the pixel with greater coherence coefficient have larger ratio,and the number of PS points obtained by the Correlation-coefficient method is more,and the monitoring results have higher accuracy.Therefore,the 3D elasticity structure model can be effectively applied to PS-InSAR common master image selection.

关 键 词：公共主影像 三维弹力结构模型 三基线和最小模型 综合相关函数模型 PS-INSAR 胡克定律 

分 类 号：P237[天文地球—摄影测量与遥感]