TomoSAR技术在城市形变监测中的应用.doc

文档介绍：
TomoSAR 技术在城市形变监测中的应用#
廖明生1,魏恋欢1,2,BALZ Timo1,张路1*
(1. 武汉大学测绘遥感信息工程国家重点实验室;
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2. 德国慕尼黑工业大学制图学研究所)
摘要:作为永久散射体雷达干涉测量技术的延伸,多基线 SAR 层析成像技术能够分离单个
SAR 像素内的多重散射体信号,精确地获取人工地物目标的三维位置和形变信息,突破城
市地区形变监测中叠掩效应的制约,实现城市动态形变监测。尤其是新一代高分辨率 SAR
卫星发射成功后,为城市动态形变监测研究提供了大量高分辨率高精度数据源。本文首先介
绍 SAR 层析技术的理论模型,然后归纳了现有的层析算法和应用领域,最后探讨了该技术
发展面临的关键问题并展望了其广阔发展前景。
关键词:形变监测;SAR 层析成像;差分 SAR 层析成像;谱估计;压缩感知
中图分类号:P237
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Application of TomoSAR in Urban Deformation
Surveillance
LIAO Mingsheng1, WEI Lianhuan1,2, BALZ Timo1, ZHANG Lu1
(1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing
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(LIESMARS), Wuhan University, Wuhan 430079;
2. Department of Cartography, Technical University of Munich, Munich 80333, Germany)
Abstract: Multi-baseline SAR tomography is an extension of Permanent Scatterer SAR
Interferometry (PS-InSAR), in which the distribution of scatterers in the elevation direction and
the corresponding reflectivity inside one resolution cell can be retrieved. In this way, TomoSAR
aims at real and unambiguous 3D SAR imaging, . imaging also in the third coordinate: elevation.
Besides the 3D positions of the superimposed point scatterers, the deformation velocity of each
scatterer can also be retrieved by differential SAR tomography. The problem of the layover effect
in urban environments can be solved with this new t