摘 要合成孔径雷达干涉测量(Interferometric Synthetic Aperture Radar, InSAR) 技术是一种对地测量的新技术,因其具有全天候、全天时、高分辨率和连续空间 覆盖的优势,逐步受到世界各地研究者的关注。随着研究的不断深入,InSAR 技 术从最初的地形测绘和提取 DEM 拓展到更广阔的领域。在地震形变监测领域, InSAR 已成为监测地震同震、震后以及震间断层滑动的重要手段之一。69971
本论文选择 2009 年 4 月 6 日发生在意大利拉奎拉地区的 Ms6。5 地震作为 研究对象,以差分干涉测量 (D-InSAR)技术为研究手段,根据欧空局提供的 ENVISATASAR 数据分析得出二轨差分方法的处理流程和地震形变场,主要工作 有:
(1)介绍了 InSAR 和 D-InSAR 基本原理,在数据处理平台 GAMMA 软件的 支持下,掌握了 D-InSAR 数据处理的过程,并详细分析了数据处理过程中的误 差来源;
(2)根据 6 景 ENVISATA SAR 数据及 SRTM DEM 数据,采用双轨法差分得 出了拉奎拉地震形变场和视线向(LOS)形变值。
毕业论文关键词:合成孔径雷达 意大利拉奎拉地震 同震形变场
The L'Aquila earthquake deformation monitoring based InSAR technology
Abstract Interferometric Synthetic Aperture Radar,is a new technique for ground measurement,because it has the advantages of all-weather,all day,high resolution and continuous space coverage,and is gradually being concerned by researchers around the world.With the deepening of research,InSAR technology from the initial mapping and extraction of DEM to expand to a wider area of.In the field of seismic deformation monitoring,InSAR has become one of the important means to monitor the same earthquake,earthquake and fault slip.
The choice in 2009 April 6 occurred in L'Aquila,Italy area earthquake Ms6.5 as the research object to the differential interferometry (D-InSAR) technology for research methods,according to the ESA's ENVISAT ASAR data analysis that track two variable field methods of processing and seismic shape difference.The main work is:
(1) introduces the basic principles of InSAR and D-InSAR,in the data processing platform GAMMA software support,master the process of D-InSAR data processing,and detailed analysis of the data processing in the process of error sources;
(2) according to the 6 Scene of ENVISAT ASAR data and SRTM DEM data,the two track approach difference that the L'Aquila earthquake deformation field and the line of sight (LOS) deformation value.
Key words:D-InSAR L′Aquila earthquake coseismic deformationfield
目录
摘 要 1
Abstract 2
1 绪论 4
1.1 引言 4
1.2 InSAR 技术与数据处理系统的发展 4
2 D-InSAR 测量基本原理 6
2.1 InSAR 原理 6
2.2 D-InSAR 原理 6
3 数据的选取及其处理方案 8
3.1 拉奎拉地震简介 8
3.2 影像选取 8
3.3 数据处理流程 9
3.4 去除平地效应 12
3.5 地理编码 14
3.6 差分干涉结果解译