融合多平台DInSAR数据解算拉奎拉地震三维同震形变场
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摘要
针对单一平台DInSAR技术仅能获取雷达视线方向同震形变场的问题,根据雷达成像的几何条件,融合不同轨道、不同平台的DInSAR数据解算了拉奎拉地震的三维同震形变场。三维形变结果反映的拉奎拉地震发震断层的特征与地质调查的结果较吻合。将得到的三维形变场数据与该地区GPS观测站数据进行比较,结果表明,得到的拉奎拉地震的三维同震形变场比较可靠且精度较高。
Differential Synthetic Aperture Radar Interferometry(DInSAR) can only measure one-dimensional deformation of surface along Radar line-of-sight(LOS).However,surface changes always exhibit three-dimensional(3D) characteristics.This paper presents a method to estimate 3D deformation of L'Aquila earthquake by combining multi-platform DInSAR LOS data based on the imaging geometry of Radar.The characters of the surface reflected by the 3D deformation are very consistent with the geological exploration.The 3D deformation was also compared with real GPS survey,and the results demonstrate that the 3D surface deformation fields are reliable and with high accuracy.
Differential Synthetic Aperture Radar Interferometry(DInSAR) can only measure one-dimensional deformation of surface along Radar line-of-sight(LOS).However,surface changes always exhibit three-dimensional(3D) characteristics.This paper presents a method to estimate 3D deformation of L'Aquila earthquake by combining multi-platform DInSAR LOS data based on the imaging geometry of Radar.The characters of the surface reflected by the 3D deformation are very consistent with the geological exploration.The 3D deformation was also compared with real GPS survey,and the results demonstrate that the 3D surface deformation fields are reliable and with high accuracy.
引文
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[2]Atzori S,Hunstad I,Chini M,et al.Finite FaultInversion of DInSAR Coseismic Displacement of the2009L’Aquila Earthquake(Central Italy)[J].Geo-physical Research Letters,2009,36,L15305,doi:10.1029/2009GL039293
[3]Pino N A,Luccio F D.Source Complexity of the 6April 2009 L’Aquila(Central Ltaly)Earthquakeand Its Strongest Aftershock Revealed by Elementa-ry Seismological Analysis[J].Geophysical ResearchLetters,2009,36,L23305,doi:10.1029/2009GL041331
[4]Iitituto Nazionale Di Geofisica E Vulcanologia(IN-GV).Measurement and Modeling of Co-seismic De-formation During the L’Aquila Earthquake,Prelim-inary Results[R].National Earthquake Center ofItaly,Rome,2009
[5]Walters R J,Elliott J R,D’Agostino N,et al.The2009 L’Aquila Earthquake(Central Ltaly):ASource Mechanism and Implications for SeismicHazard[J].Geophysical Research Letters,2009,36,L17312,doi:10.1029/2009GL039337
[6]Wang Yongzhe,Ou Ziqiang,Zhu Jianjun,et al.Coseismic Deformation of 2009 L’Aquila,ItalyEarthquake Derived from Ascending and DescendingENVISAT/ASAR Images[C].The 6th Internation-al Conference on Wireless Communications,Net-working and Mobile Computing,WiCOM 2010,Chengdu,2010
[7]刘国祥.利用雷达干涉技术监测区域地表形变[M].北京:测绘出版社,2006
[8]Li Zhiwei,Ding Xiaoli,Huang C,et al.ImprovedFiltering Parameter Determination for the GoldsteinRadar Interferogram Filter[J].ISPRS Journal ofPhotogrammetry&Remote Sensing,2008,63:621-634
[9]胡俊,李志伟,朱建军,等.融合升降轨SAR干涉相位和幅度信息揭示地表三维形变场的研究[J].中国科学:地球科学,2010,40(3):307-318
[10]Emergeo Working Group.Rilievi Geologici di Ter-reno Effettuati Nell’area Epicentrale Della SequenzaSismica Dell’Aquilano del 6Aprile 2009[R].INGVreport,Ist,National Earthquake Center of Italy,Rome,2009
[11]Cheloni D,D’Agostino N,D’Anastasio E,et al.Coseismic and Initial Post-seismic Slip of the 2009Mw 6.3 L’Aquila Earthquake,Italy,from GPSMeasurements[J].Geophysical Journal Internation-al,2010,181:1 539-1 546
[2]Atzori S,Hunstad I,Chini M,et al.Finite FaultInversion of DInSAR Coseismic Displacement of the2009L’Aquila Earthquake(Central Italy)[J].Geo-physical Research Letters,2009,36,L15305,doi:10.1029/2009GL039293
[3]Pino N A,Luccio F D.Source Complexity of the 6April 2009 L’Aquila(Central Ltaly)Earthquakeand Its Strongest Aftershock Revealed by Elementa-ry Seismological Analysis[J].Geophysical ResearchLetters,2009,36,L23305,doi:10.1029/2009GL041331
[4]Iitituto Nazionale Di Geofisica E Vulcanologia(IN-GV).Measurement and Modeling of Co-seismic De-formation During the L’Aquila Earthquake,Prelim-inary Results[R].National Earthquake Center ofItaly,Rome,2009
[5]Walters R J,Elliott J R,D’Agostino N,et al.The2009 L’Aquila Earthquake(Central Ltaly):ASource Mechanism and Implications for SeismicHazard[J].Geophysical Research Letters,2009,36,L17312,doi:10.1029/2009GL039337
[6]Wang Yongzhe,Ou Ziqiang,Zhu Jianjun,et al.Coseismic Deformation of 2009 L’Aquila,ItalyEarthquake Derived from Ascending and DescendingENVISAT/ASAR Images[C].The 6th Internation-al Conference on Wireless Communications,Net-working and Mobile Computing,WiCOM 2010,Chengdu,2010
[7]刘国祥.利用雷达干涉技术监测区域地表形变[M].北京:测绘出版社,2006
[8]Li Zhiwei,Ding Xiaoli,Huang C,et al.ImprovedFiltering Parameter Determination for the GoldsteinRadar Interferogram Filter[J].ISPRS Journal ofPhotogrammetry&Remote Sensing,2008,63:621-634
[9]胡俊,李志伟,朱建军,等.融合升降轨SAR干涉相位和幅度信息揭示地表三维形变场的研究[J].中国科学:地球科学,2010,40(3):307-318
[10]Emergeo Working Group.Rilievi Geologici di Ter-reno Effettuati Nell’area Epicentrale Della SequenzaSismica Dell’Aquilano del 6Aprile 2009[R].INGVreport,Ist,National Earthquake Center of Italy,Rome,2009
[11]Cheloni D,D’Agostino N,D’Anastasio E,et al.Coseismic and Initial Post-seismic Slip of the 2009Mw 6.3 L’Aquila Earthquake,Italy,from GPSMeasurements[J].Geophysical Journal Internation-al,2010,181:1 539-1 546
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