SBAS方法监测城市地表形变初步研究  

PRELIMINARY STUDY ON MONITORING URBAN SURFACE DEFORMATION WITH SBAS

作　　者：余勇[1] 卞正富[1] 刘振国[1] 雷少刚[1] 

机构地区：[1]中国矿业大学环境与测绘学院,徐州221008

出　　处：《大地测量与地球动力学》2013年第1期133-136,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(51174191);教育部新世纪优秀人才支持计划(NCET-12-0956);中国博士后科学基金(201104580);江苏高校优势学科建设工程项目

摘　　要：常规雷达差分干涉测量(DInSAR)技术因受时间和空间失相干的影响,限制了其运用。永久散射体(PS)方法虽然可有效解决失相干和大气延迟等问题,但其要求SAR影像数目较多。而小基线集(SBAS)方法对SAR影像数目不敏感,因此,以太原地区为研究区,收集了2008年1月—2010年8月期间的8幅ENVISAT卫星的SAR数据,采用SBAS方法获取太原地区的地表形变场。发现万柏林、吴家堡和小店的最大形变速率分别为-27.11、-55.92和-67.61 mm/a,所得的形变速率图和形变序列图与前人结果基本一致,从而验证了SBAS方法监测城市地表形变的可行性。The application of conventional differential SAR interferometry （DInSAR） is limited because of tem- poral and spatial decorrelation. Although the permanent scatterers （PS） method could deal with the problem of decorrelation and phase delay, it must be based on a Darge number of SAR images （generally more than 25 ）. However, the small baseline subsets （SBAS） method has the advantage. So, in this paper, 8 of SAR data acquired from January 2008 to August 2010 by the ENVISAT satellite are taken as the test data and then, the deformation of Taiyuan city is obtained with the SBAS method, and the maximum deformation rates of three sites：Wanbolin, Wu- jiabao and Xiaodian are - 27.11 mm/a, - 55.92 mm/a and - 67.61 mm/a respectively. The results of deforma- tion rate and time-series deformation maps are consistent with the previous results, thus it has verified that the SBAS method is feasible to monitor surface deformation.

关 键 词：雷达差分干涉测量 永久散射体方法 小基线集方法 ENVISAT 地表形变 

分 类 号：P315.72[天文地球—地震学] P227[天文地球—固体地球物理学]