基于D-InSAR技术的意大利拉奎拉地震同震形变分析
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摘要
基于DORIS软件和欧空局提供的ENVISAT数据,结合美国NASA的高精度SRTM数字高程模型DEM,以二轨差分方法获取了意大利拉奎拉地震同震形变场的差分干涉图。结果表明,该区域在往西南方向上的弧后扩张是此次地震发生的主要驱动力,地震造成了该地区在卫星雷达视线方向上隆起了25.2cm。
According to the principles of D-InSAR,by using Doris and ENVISAT SAR data,two-pass method of D-InSAR is utilized to acquire coseismic surface deformation images caused by L'Aquila(Italy)earthquake.Preliminary quantitative cognition was completed based on the D-InSAR interferogram.The results show that the main driving force of the earthquake is the southwest wards and up back-arc spreading of the area and the earthquake makes the area uplift 25.2 cm in the sight line direction of SAR.
According to the principles of D-InSAR,by using Doris and ENVISAT SAR data,two-pass method of D-InSAR is utilized to acquire coseismic surface deformation images caused by L'Aquila(Italy)earthquake.Preliminary quantitative cognition was completed based on the D-InSAR interferogram.The results show that the main driving force of the earthquake is the southwest wards and up back-arc spreading of the area and the earthquake makes the area uplift 25.2 cm in the sight line direction of SAR.
引文
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12龙四春,李陶.D-InSAR中参考DEM误差与轨道误差对相位贡献的灵敏度研究[J].遥感信息,2009(1):3-6.(Long Sichun and Li Tao.Phase sensitivity study on D-In-SAR for reference DEMand orbit error[J].Remote Sensing Information,2009,(1):3-6)
13任小冲,等.利用DORIS软件进行SAR差分干涉测量提取地震形变研究[J].河南理工大学学报(自然科学版),2007,26(5):535-539.(Ren Xiaochong,et al.Re-search on extract earthquake deformation in D-InSAR by u-sing DORIS[J].Journal of Henan polytechnic university(Natural Science),2007,26(5):535-539)
14ESA.Italy Earthquake,April2009[EB/OL].http://earth.esa.int/ew/earthquakes/Italy-April09/,2009-08-13/2009-09-05.
15Chris Rowan.Tectonics of the Italian Earthquake[EB/OL].http://scienceblogs.com/highlyallochthonous/2009/04/tectonics-of-the-italian-earth.php,2009-04-06/2009-09-05.
2路旭,等.用InSAR作地面沉降监测的试验研究[J].大地测量与地球动力学,2002,(4):66-70.(Lu Xu,et al.Experiment on land subsidence monitoring by InSAR[J].Journal of Geodesy and Geodynamics,2002,(4):66-70)
3周建民.InSAR技术及其在地表形变监测中的应用研究[D].河海大学,2006.(Zhou Jianmin.SAR Interferometry for Surface Deformation Monitoring[D].Hohai University,2006)
4周春霞.星载SAR干涉测量技术及其在南极冰貌地形研究中的应用[D].武汉大学,2004.(Zhou Chunxia.Space-borne Interferometric Synthetic Aperture Radar and its appli-cation on the glacial geomorphology in the Antarctic[D].Wuhan university,2004)
5Didier Massonnet,etal.The displacement field of the Lan-ders earthquake mapped by radar interferometry[J].Nature1993,364:138-142.
6Howard A,et al.On the derivation of coseismic displacement fields using differential radar interferometry:the Landers earthquake[J].Journal of Geophysical Research Solid Earth,1994,99(B10):19617-19634.
7张艳梅,等.基于DInSAR的2001年昆仑山口西8.1级大地震形变探测[J].大地测量与地球动力学,2007,(3):12-17.(Zhang Yanmei,et al.Seismic deformation de-tection of Ms8.1earthquake in west to Kunlun mountain pass in2001with DInSAR[J].Journal of Geodesy and Geody-namics,2007,(1):12-17)
8张红,王超,刘智.获取张北地震同震形变场的差分干涉测量技术[J].中国图象图形学报,2000,5(6):497-501.(Zhang Hong,Wang Chao and Liu Zhi.The differential radar interferometry technique to achieve coseismic displacement field of the Zhangbei earthquake[J].Journal of Image and Graphics,2000,5(6):497-501)
9张磊,等.基于Doris的台湾集集地震同震位移场计算[J].大地测量与地球动力学,2007,(3):18-24.(Zhang lei,et al.Determ nation of coseismic displacement field of Taiwan Chi-Chi earthquake based on Doris[J].Journal of Geodesy and Geodynamics,2007,(3):18-24)
10李毅,等.用D-InSAR研究巴姆地震形变场[J].大地测量与地球动力学,2008,(1):32-35.(Li Yi,et al.Bam earthquake deformation field research by D-InSAR[J].Journal of Geodesy and Geodynamics,2008,(1):32-35)
11蒋弥,等.用L波段和C波段SAR数据研究汶川地震的同震形变[J].大地测量与地球动力学,2009,(1):21-26.(Jiang Mi,et al.Study on coseismic deformation of wen-chuan earthquake by use of Land C wavebands of SAR data[J].Journal of Geodesy and Geodynamics,2009,(1):21-26)
12龙四春,李陶.D-InSAR中参考DEM误差与轨道误差对相位贡献的灵敏度研究[J].遥感信息,2009(1):3-6.(Long Sichun and Li Tao.Phase sensitivity study on D-In-SAR for reference DEMand orbit error[J].Remote Sensing Information,2009,(1):3-6)
13任小冲,等.利用DORIS软件进行SAR差分干涉测量提取地震形变研究[J].河南理工大学学报(自然科学版),2007,26(5):535-539.(Ren Xiaochong,et al.Re-search on extract earthquake deformation in D-InSAR by u-sing DORIS[J].Journal of Henan polytechnic university(Natural Science),2007,26(5):535-539)
14ESA.Italy Earthquake,April2009[EB/OL].http://earth.esa.int/ew/earthquakes/Italy-April09/,2009-08-13/2009-09-05.
15Chris Rowan.Tectonics of the Italian Earthquake[EB/OL].http://scienceblogs.com/highlyallochthonous/2009/04/tectonics-of-the-italian-earth.php,2009-04-06/2009-09-05.
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