Microlocal analysis of imaging operators for effective common offset seismic reconstruction

Microlocal analysis of imaging operators for effective common offset seismic reconstruction
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有效共偏置地震重建的成像算子的微局域分析

DOI:
10.1088/1361-6420/aadc2a
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发表时间:
2018
期刊:
影响因子:
2.1
通讯作者:
Rieder, Andreas
Rieder, Andreas
中科院分区:
数学2区
文献类型:
--
作者:
Grathwohl, Christine;Kunstmann, Peer;Quinto, Eric Todd;Rieder, Andreas

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椭圆 Radon 变换 (eRT) 对 2D 椭圆和 3D 旋转椭球体上的函数进行积分。因此,它可以作为常见偏移扫描几何结构下线性地震成像的模型,其中源和接收器按恒定矢量偏移。由于 eRT 的反演公式未知,我们提出了某些成像算子(广义反投影算子),它允许从地震测量中重建搜索反射率函数的一些奇点。我们计算和分析这些成像算子作为伪微分算子的主要符号,以了解它们如何映射、强调或弱化奇点。我们利用这些信息来开发局部重建算子,这些算子可以相对独立于深度和偏移进行重建。数值例子说明了理论结果。
The elliptic Radon transform (eRT) integrates functions over ellipses in 2D and ellipsoids of revolution in 3D. It thus serves as a model for linearized seismic imaging under the common offset scanning geometry where sources and receivers are offset by a constant vector. As an inversion formula of eRT is unknown we propose certain imaging operators (generalized backprojection operators) which allow to reconstruct some singularities of the searched-for reflectivity function from seismic measurements. We calculate and analyze the principal symbols of these imaging operators as pseudo-differential operators to understand how they map, emphasize or de-emphasize singularities. We use this information to develop local reconstruction operators that reconstruct relatively independently of depth and offset. Numerical examples illustrate the theoretical findings.
二维地震成像中常见偏移采集几何结构的近似逆
DOI: 10.1088/1361-6420/aa9900
发表时间: 2018
期刊: Inverse Problems
影响因子: 2.1
作者:
Grathwohl, Christine;Kunstmann, Peer;Quinto, Eric Todd;Rieder, Andreas
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