首页> 外文会议>第21届国际摄影测量与遥感大会(ISPRS 2008)论文集 >ESTIMATION OF SOURCE PARAMETERS OF 2003 BAM (IRAN) EARTHQUAKE FROM ENVISAT SAR IMAGES USING GENETIC ALGORITHM TECHNIQUE
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ESTIMATION OF SOURCE PARAMETERS OF 2003 BAM (IRAN) EARTHQUAKE FROM ENVISAT SAR IMAGES USING GENETIC ALGORITHM TECHNIQUE

机译:利用遗传算法从ENVISAT SAR图像估计2003年巴姆(伊朗)地震震源参数

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In this paper, we analyze synthetic aperture radar (SAR) interferograms derived from Envisat radar data. Use of interferograms from both ascending and descending satellite passes enables us to indicate regions of surface and near-surface slip which is used to modeling procedure. Also we used azimuth offset (AZO) data as additional data. This is horizontal displacement information for earthquake that is obtained with sub pixel matching of SAR amplitude images. Combining the interferometry with subpixel matching of the SAR amplitude images allows us to obtain the full three-dimensional displacement field for the earthquake. We inverted this field to gain insight into the fault geometry and slip distribution of the rupture. Our results indicate that the best fitting dislocation model is a steeply strike-slip fault with maximum of ~3 m that has a size of 12.3 by 8.3 km and strike 355° from north.
机译:在本文中,我们分析了从Envisat雷达数据得出的合成孔径雷达(SAR)干涉图。使用来自上升和下降卫星通行的干涉图,使我们能够指示用于建模过程的表面和近表面滑动区域。我们还使用了方位角偏移(AZO)数据作为附加数据。这是通过SAR振幅图像的子像素匹配获得的地震水平位移信息。将干涉仪与SAR振幅图像的子像素匹配相结合,可以使我们获得地震的完整三维位移场。我们反转了该字段,以深入了解断裂的几何形状和滑动分布。我们的结果表明,最合适的错位模型是一个陡峭的走滑断层,最大断层〜3 m,大小为12.3 x 8.3 km,向北走动355°。

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