联合GPS和InSAR观测结果计算汶川地震三维地表形变
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摘要
为了解决合成孔径雷达干涉测量(InSAR)不能真实反映三维地表形变量,给分析地震的水平位移场和垂直位移场带来困难的问题,提出一种联合利用GPS和InSAR观测结果计算地表三维位移的方法,并以汶川地震为例进行计算。计算结果表明,汶川地震具有明显的右旋和逆冲特征。
InSAR(Synthetic Aperture Radar Interferometry)can only obtain the displacements along direction of LOS(line-of-sight),it is not the real three-dimensional surface deformation.Therefore it is difficult to analyze both vertical and horizontal terrain displacements.A method combining GPS and InSAR data to calculate three-dimensional terrain displacements of Wenchuan earthquake is proposed.The results show that the earthquake pupture is obviously right-leteral and thrust.
InSAR(Synthetic Aperture Radar Interferometry)can only obtain the displacements along direction of LOS(line-of-sight),it is not the real three-dimensional surface deformation.Therefore it is difficult to analyze both vertical and horizontal terrain displacements.A method combining GPS and InSAR data to calculate three-dimensional terrain displacements of Wenchuan earthquake is proposed.The results show that the earthquake pupture is obviously right-leteral and thrust.
引文
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7王志勇.星载雷达干涉测量技术在地面沉降监测中的应用[D].山东科技大学,2007.(Wang Zhiyong.Application of spaceborne InSAR technique in monitoring the land sub-sidence[D].Shandong University of Science and Technolo-gy,2007)
8胡守超.InSAR时间序列处理方法及其在上海地面沉降监测中的应用[D].同济大学,2010.(Hu Shouchao.Meth-ods for InSAR time series analyzing and applications to ground subsidence monitoring in Shanghai[D].Tongji Uni-versity,2010)
9王解先,陈俊平,张春艳.椭球曲面的拟合[J].同济大学学报,2004,32(1):82-85.(Wang Jiexian,Chen Junping and Zhang Chunyan.Fitting of ellipsoidal surface[J].Jour-nal of Tongji University,2004,32(1):82-85)
10姚吉利,等.拟合点分布与GPS水准面拟合精度关系研究[J].大地测量与地球动力学,2008,(5):50-54.(Yao Jili,et al.Research on accuracy of quasi-geoid with fitting methods under different distribution of GPS points[J].Journal of Geodesy and Geodynamics,2008,(5):50-54)
11徐锡伟,等.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.(Xu Xiwei,et al.TheMs8.0Wenchuan earthquake surface ruptures and its seismogenic structure[J].Seismology and Geology,2008,30(3):597-629)
2廖明生,林珲.雷达干涉测量学:原理与信号处理基础[M].北京:测绘出版社,2003.(Liao Mingsheng and Lin Hui.Synthetic aperture radar interferometry:Principle and signal processing[M].Beijing:Surveying and Mapping Press,2003)
3屈春燕,等.汶川Ms8.0地震InSAR同震形变场特征分析[J].地震地质,2008,30(4):1076-1083.(Qu Chun-yan,et al.Analysis on the characteristics of InSAR coseis-mic deformation of theMs8.0Wenchuan earthquake[J].Seismology and Geology,2008,30(4):1076-1083)
4Wu Jicang,et al.Fault slip of the2008WenchuanMs8.0earthquake by inversion of GPS measurements[A].Proceed-ings of CPGPS[C].2009,217-219.
5孙建宝,等.汶川Ms8.0地震InSAR形变观测及初步分析[J].地震地质,2008,30(3):789-794.(Sun Jianbao,et al.InSAR deformation observation and preliminary analy-sis of theMs8.0Wenchuan earthquake[J].Seismology and Geology,2008,30(3):789-794)
6Ramon F Hanssen.Radar interferometry data interpertation and error ananlysis[M].Kluwer Academic,2002.
7王志勇.星载雷达干涉测量技术在地面沉降监测中的应用[D].山东科技大学,2007.(Wang Zhiyong.Application of spaceborne InSAR technique in monitoring the land sub-sidence[D].Shandong University of Science and Technolo-gy,2007)
8胡守超.InSAR时间序列处理方法及其在上海地面沉降监测中的应用[D].同济大学,2010.(Hu Shouchao.Meth-ods for InSAR time series analyzing and applications to ground subsidence monitoring in Shanghai[D].Tongji Uni-versity,2010)
9王解先,陈俊平,张春艳.椭球曲面的拟合[J].同济大学学报,2004,32(1):82-85.(Wang Jiexian,Chen Junping and Zhang Chunyan.Fitting of ellipsoidal surface[J].Jour-nal of Tongji University,2004,32(1):82-85)
10姚吉利,等.拟合点分布与GPS水准面拟合精度关系研究[J].大地测量与地球动力学,2008,(5):50-54.(Yao Jili,et al.Research on accuracy of quasi-geoid with fitting methods under different distribution of GPS points[J].Journal of Geodesy and Geodynamics,2008,(5):50-54)
11徐锡伟,等.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.(Xu Xiwei,et al.TheMs8.0Wenchuan earthquake surface ruptures and its seismogenic structure[J].Seismology and Geology,2008,30(3):597-629)
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