基于COSMO-SkyMed雷达影像的山地城市地表形变监测研究  

Research on surface deformation monitoring of mountain cities based on COSMO-SkyMed radar image

作　　者：王成 方璐 Wang Cheng;Fang Lu(Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China)

机构地区：[1]长江勘测规划设计研究院

出　　处：《电子测量技术》2018年第9期103-108,共6页Electronic Measurement Technology

摘　　要：短基线集合成孔径雷达干涉测量技术（SBAS-InSAR）在限制了时空基线的大小基础上自由组成干涉对,增加了时间采样,相干点密度高,可以有效进行城市地表形变监测。本文采用覆盖重庆主城区的12景COSMO-SkyMed高分辨率SAR影像（X波段）为主要数据源,其在地表微小形变探测方面较C波段和L波段更为敏感。通过选取时空基线较短相干性好的干涉像对,采用SBAS-InSAR方法进行形变反演,并对卫星轨道误差、大气相位误差、DEM残差等进行削弱,提高监测精度。并对比水准观测数据,得到干涉测量外符合精度为3.8mm。同时,根据历史地形图数据、水文地质等资料分析地表形变的主要影响因素。Short baseline set synthetic aperture radar interferometry（SBAS-InSAR）,based on the limitation of the space-time baseline,is free to form interference pairs,which increases time sampling and high coherence point density,and can effectively monitor urban surface deformation.In this paper,the high resolution SAR image（X band）of the 12 COSMO-SkyMed of the main city zone of Chongqing is taken as the main data source,and it is more sensitive to the detection of micro deformation on the surface than C band and L band.By selecting the interferometric image pairs with good temporal and spatial baseline and good coherence,the SBAS-InSAR method is used to do the deformation inversion,and the satellite orbit error,atmospheric phase error and DEM residuals are weakened,so as to improve the monitoring accuracy.Compared with the level observation data,the accuracy of the interference measurement is 3.8 mm.At the same time,the main influence factors of surface deformation are analyzed according to the data of historical topographic map,hydrogeology and so on.

关 键 词：COSMO-SKYED SBAS-InSAR 山地城市 形变监测 

分 类 号：TN959.3[电子电信—信号与信息处理]