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针对DInSAR技术只能获得雷达视线方向形变,无法完全反映地震三维形变场的缺点,提出了利用升降轨SAR干涉对,联合DInSAR技术和MAI技术,采用抗差最小二乘方法求解三维地表形变场,采用残差绝对值和最小法确定权矩阵,保证了结果的可靠性.以2003年伊朗BAM地震为例,分析结果表明:BAM地震运动方式不仅具有南北向的水平走滑,而且带有较大的垂直分量和东西向水平分量.MAI技术形变监测受相干值影响,在相干值大于0.6的区域相位标准差小于0.075m.三维形变场在上下和东西方向分量和联合DInSAR和Offset Tracking技术结果一致,在相干值大于0.6时,最大差异为0.031m;南北方向分量差异较大,达到dm级.提出方法更好地重建地震三维形变场,有助于更好地分析地震发生的原因和影响范围.
According to DInSAR technology, we can get only radar line-of-sight deformation and can not fully reflect the shortcomings of 3D seismic deformation field. We propose to use DHSS and MAI technology to solve three-dimensional surface deformation field by using LS interference pairs, The absolute matrix and minimum method were used to determine the weight matrix to ensure the reliability of the results.Based on the BAM earthquake in Iran in 2003, the results show that the BAM seismic motion not only has horizontal north-south strike-slip but also larger Vertical and east-west horizontal components.MAI technique deformation monitoring is affected by the coherence, and the phase standard deviation of the coherence is greater than 0.6 in the region of less than 0.075m. The 3D deformation field in the up and down and east-west directions is consistent with the joint DInSAR and Offset Tracking results , The maximum difference is 0.031m when the coherence value is greater than 0.6, and the difference between north and south direction is large, reaching dm level.The proposed method can reconstruct the three-dimensional deformation field of the earthquake better and help to better analyze the reason and scope of the earthquake .