干涉合成孔径雷达三维地表形变监测  

Measuring Three-dimensional Deformation of Earth Surface Using InSAR

作　　者：任小冲[1] 汤井田[1] 李志伟[1] 佟国功[1] 胡丹[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《海洋测绘》2008年第5期45-48,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(40404001)

摘　　要：干涉合成孔径雷达(InSAR)技术是利用两幅或多幅SAR复数影像的相位差信息提取地表地形信息和形变信息的,其对卫星视线向形变比较敏感,精度可达厘米甚至毫米级,而对沿轨道方向的形变不敏感。本文总结了几种获取地表位移三维分量的方法,并对每种方法进行了分析。Interferometric synthetic aperture radar （InSAR） exploits the phase differences of at least two complex-valued SAR images acquired from different orbit positions and/or at difference times. It can provide the three-dimension information and monitor small changes of the earth ＇s surface. It is only sensitive to onedimensional deformation （along the satellite＇s line of sight）, and its theoretical precision can reach centimeter even subcentimeter. This paper comes up with a summary about some ways of deriving three-dimensional earth surface motion and analyzes their characteristic.

关 键 词：合成孔径雷达干涉测量 方位向偏移(AZO) 距离向偏移(RO) 多孔径InSAR 

分 类 号：TP753[自动化与计算机技术—检测技术与自动化装置]