星载D-INSAR技术及初步应用——以西藏玛尼地震为例

地震地质 ›› 2001, Vol. 23 ›› Issue (3): 439-446.

星载D-INSAR技术及初步应用——以西藏玛尼地震为例

单新建¹, 马瑾¹, 柳稼航¹, 王长林², 宋晓宇¹

1. 中国地震局地质研究所, 中国地震局构造物理开放实研室, 北京100029;
2. 中国科学院遥感应用研究所, 北京100101

收稿日期:2001-02-28 修回日期:2001-04-30 出版日期:2001-09-04 发布日期:2009-10-26
作者简介:单新建,男,1966年生,1991年毕业于中国科大研究生院地球物理专业,现为副研究员、博士后,主要从事INSAR技术与应用、遥感与GIS集成技术及地质环境灾害评价、震源机制等方面的研究工作,电话:010-62009110,E-mail:xjshan@263.net.
基金资助:
国家自然科学基金(49802027)与国家重点基础研究规划项目(G1998040703)共同资助;中国地震局地质研究所论著2001B0029.

THE THEORY OF D-INSAR AND ITS APPLICATION TO MAPPING THE DISPLACEMENT FIELDS OF EARTHQUAKE

Shan Xinjian¹, Ma Jin¹, Liu Jiahang¹, Wang Changlin², Song Xiaoyu¹

1. Institute of Geology &, Laboratory of Tectonocphysics, China Seismological Bureau, Beijing 100029;
2. Institute of Remote Sensing Application, Chinese Academy of Sciences, Beijing 100101

Received:2001-02-28 Revised:2001-04-30 Online:2001-09-04 Published:2009-10-26

摘要/Abstract

摘要： 近10a来,干涉合成孔径雷达(INSAR,InterferometricSyntheticApertureRadar;简称:干涉雷达)测量技术取得了令世人瞩目的成绩,已成为极具有潜力的空间对地观测新技术。较详细地介绍了干涉合成孔径雷达、差分干涉合成孔径雷达(D-INSAR,DifferentialINSAR;简称:差分干涉雷达)技术的基本原理,并以1997年11月8日西藏玛尼地震为例,通过三通差分干涉处理,获取了玛尼地震前后的地表变形场。通过分析可知,变形梯度带与发震断层平行,均沿NEE-SWW(250°)分布,断层水平错距近5m,最大隆起斜距向位移量为98cm,最大沉降斜距向位移量为95cm。

关键词: 干涉合成孔径雷达技术, 差分干涉技术, 地表垂直形变场　玛尼地震

Abstract: INSAR (Interferometric Synthetic Aperture Radar) is a new technique developed in the last decade. It has a non-replaceable application potential in observing vertical deformation of ground surface. It would provide entirely new means and method for monitoring the dynamic field of earthquake. In the SAR images acquired, not only the intensity information but also the phase information of surface features has been recorded, which is an advantage unparalleled by optical remote sensing. Using phase information, the INSAR technique may provide digital elevation model and information on surface deformation. The algorithms of INSAR and D-INSAR (Differential INSAR) are introduced in this paper in details. This new technique has been applied to the study of Mani, Tibet earthquake of Nov. 11, 1997. For detecting the characteristics of deformation produced by Mani earthquake, we have collected three ERS-1/2 SAR images of Mani area, two of which (May 20,1996 and May 21,1996) are tandem mode data (1 day repeat) before Mani M_S 7.9 earthquake in 1997, one of which (April 21,1998) after the earthquake. We used three pass interferometric mode to process the images. First, we used May 20 and May 21,1996 images by making interferometric processing, and extracting the DEM of the studied area. Then, we used May 21 ,1996 and April 21,1998 images by making differential interferometric processing, and removing the effect of terrain obtained from DEM. At last, we detected co-seismic surface displacement of Mani earthquake by D-INSAR technique. The results show that the surface deformation caused by Mani earthquake occurred along NEE direction, and the length of surface rupture is at least more than 70km. Around epicentral area, the width of deformation field in S-N direction is wider than that in other areas. It is determined that the maximum elevation in this area is 98cm, while the maximum subsidence is 95cm. The co-seismic horizontal displacement of the fault is about 5m.

Key words: INSAR, D-INSAR, Surface vertical deformation, Mani earthquake

单新建, 马瑾, 柳稼航, 王长林, 宋晓宇. 星载D-INSAR技术及初步应用——以西藏玛尼地震为例[J]. 地震地质, 2001, 23(3): 439-446.

Shan Xinjian, Ma Jin, Liu Jiahang, Wang Changlin, Song Xiaoyu. THE THEORY OF D-INSAR AND ITS APPLICATION TO MAPPING THE DISPLACEMENT FIELDS OF EARTHQUAKE[J]. SEISMOLOGY AND EGOLOGY, 2001, 23(3): 439-446.