利用车载双天线InSAR系统监测公路边坡形变  

Highway Slope Deformation Monitoring Based on Vehicle-Borne Dual-Antenna InSAR System

作　　者：罗天文 李斐[1] 潘斌[3] 沈光保 陈彤 陈嘉明 郝卫峰[5] LUO Tianwen;LI Fei;PAN Bin;SHEN Guangbao;CHEN Tong;CHEN Jiaming;HAO Weifeng(State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan430079,China;Guizhou Survey and Design Research Institute for Water Resources and Hydropower,Guiyang 550002,China;School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China;Key Laboratory of Digital Earth Science,Aerospace Information Research Institute,Chinese Academy of Science,Beijing100094,China;Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,武汉430079 [2]贵州省水利水电勘测设计研究院有限公司,贵阳550001 [3]武汉大学遥感信息工程学院,武汉430079 [4]中国科学院空天信息创新研究院数字地球重点实验室,北京100094 [5]武汉大学中国南极测绘研究中心,武汉430079

出　　处：《武汉大学学报（信息科学版）》2023年第3期359-367,共9页Geomatics and Information Science of Wuhan University

基　　金：黔科合重大专项([2017]3005-3);华能澜沧江水电股份有限公司项目(HNKJ18-H24)。

摘　　要：星载差分合成孔径雷达干涉测量(differential interferometric synthetic aperture radar,DInSAR)技术已经广泛应用于大范围的地表形变监测,但星载合成孔径雷达(synthetic aperture radar,SAR)数据获取的地表形变易受大气噪声的影响,且长时间的重访周期会导致像对之间的失相干。为了有效减弱这些影响,提出了利用零空间基线的车载合成孔径雷达干涉测量(interferometric synthetic aperture radar,InSAR)系统监测公路边坡形变的方法。在车载双天线系统采集不同时相的公路边坡SAR数据时,通过轨道控制使得异时相干涉对的空间基线接近零,从而使得利用DInSAR数据进行形变信息提取时可以减少去平地相位的过程,极大地简化了差分干涉处理的流程。以中国湖北省武汉市某区域获取的车载双天线InSAR数据为例,使用所提出的方法对7个布设的角反射器点进行形变精度分析,得到形变值均方根误差为2.206 mm。Objectives: Differential interferometric synthetic aperture radar(DInSAR) has been widely used in large-scale surface deformation monitoring. However, the surface deformation obtained from spaceborne synthetic aperture radar(SAR) data is easily affected by atmospheric noise, and the long revisit period leads to the incoherence. In order to effectively reduce these effects, we propose a method to monitor the deformation of highway slope by vehicle-borne InSAR system. Methods: Due to the orbit control of the vehicleborne dual-antenna InSAR system, the spatial baseline of the interferometric pairs is close to zero.Therefore,when the DInSAR data with this system is used to extract the deformation information, it can avoid the flat phase, which greatly simplifies the differential interference processing process.Results:A certain area of Wuhan,Hubei Province is chosen as the experimental area. Seven corner reflectors are deployed in the test area to evaluate the accuracy of deformation information extracted using the vehicle-borne dual-antenna InSAR system.The deformation of seven reflectors is calculated by using the proposed method. The root mean square error of deformation between the real value and the calculated value is 2.206 mm.Conclusions:A deformation monitoring method of zero space baseline using the vehicle-borne dual-antenna InSAR system is proposed and verified in Wuhan city. The DInSAR method based on zero space baseline can avoid the process of the flat phase. At the same time, our system is small in size, and the design of the trajectory according to the actual needs is flexibly, which is very practical for small-scale highway slope deformation monitoring. Because of the small revisit period, the vehicle-borne InSAR Data will not produce phase error due to atmospheric delay, and the deformation measurement accuracy is high.

关 键 词：零空间基线 DINSAR 车载 形变监测 公路边坡 

分 类 号：P237[天文地球—摄影测量与遥感] P258[天文地球—测绘科学与技术]