基于PALSAR数据的2010年Darfield地震地表同震形变场提取
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摘要
2010年9月3日(UTC时间),新西兰南部小镇Darfield发生了强度为Mw7.1的地震,其主震对地表造成了严重破坏。为了对由地震引起的地表形变进行研究,本文利用二轨DInSAR技术,通过2景ALOS PALSAR影像的升轨数据,成功提取了该地震的地表同震形变场。从对实验结果的分析可知,该地震的断层为东西走向,断层北盘地表呈现沿雷达视线方向的下降,最大量约为1.5米;断层南盘则发生了沿雷达视线方向的抬升,最大量超过了2米。
引文
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[9]孙倩,朱建军,李志伟,尹宏杰,胡波,蒋弥.基于信噪比的InSAR干涉图自适应滤波[J].测绘学报,2009,38(5),437-442.
[2]J.X.Zhao,J.Beavan,X.W.An,X.D.Yang,T.S.Song.A procedure for interactively processing digital acceleration records to extract permanent displacement and a comparison with GPS data from the 2010 Darfield earthquake.Proceedings of the Ninth Pacific Conference on Earthquake Engineering,Auckland,New Zealand,2011,14-14 April.
[3]G.X.Liu,J.Li,Z.Xu,J.C.Wu,Q.Chen,H.X.Zhang,R.Zhang,H.G.Jia,X.J.Luo.Surface deformation associated with the 2008 Ms8.0 Wenchuan earthquake from ALOS L-band SAR interferometry.International Journal of Applied Earth Observation and Geoinformation,2010,12,496-505.
[4]A.K.Gabriel,R.M.Goldstein,H.A.Zebker.Mapping small elevation changes over large areas:Differential radar interferometry.Journal of Geophysical Research,1989,94(B7),9183-9191.
[5]D.Massonnet,M.Rossi,C.Carmona,F.Adragna,G.Peltzer,K.Feigl,T.Rabaute.The displacement field of the Landers earthquake mapped by radar interferometry,Nature,1993,364,138-142.
[6]H.A.Zebker and P.Rosen.On the derivation of coseismic displacement fields using differential radar interferometry:The Landers earthquake.Proceedings of IGARSS 1994,Pasadena,CA,USA,8-12 Aug,1,286-288.
[7]B.Smith and D.Sandwell.Accuracy and resolution of shuttle radar topography mission data,Geophysical Research Letters,2003,30(9),1467,doi:10.1029/2002GL016643.
[8]G.Liu.Mapping of earth deformations with satellite SAR interferometry:a study of its accuracy and reliability performances.Ph.D Thesis of The Hong Kong Polytechnic University,2003.
[9]孙倩,朱建军,李志伟,尹宏杰,胡波,蒋弥.基于信噪比的InSAR干涉图自适应滤波[J].测绘学报,2009,38(5),437-442.
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