P- and S-Decomposition in Anisotropic Media with Localized Low-Rank Approximations

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P- and S-Decomposition in Anisotropic Media with Localized Low-Rank Approximations

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Title: P- and S-Decomposition in Anisotropic Media with Localized Low-Rank Approximations
Author(s):
Wang, W.;
Hua, B.;
McMechan, George A.;
Duquet, B.
Date Created: 2017-11-13
Item Type: article
Keywords: Show Keywords
Abstract: We have developed a P- and S-wave decomposition algorithm based on windowed Fourier transforms and a localized low-rank approximation with improved scalability and efficiency for anisotropic wavefields. The model and wavefield are divided into rectangular blocks that do not have to be geologically constrained; low-rank approximations and P- and S-decomposition are performed separately in each block. An overlap-add method reduces artifacts at block boundaries caused by Fourier transforms at wavefield truncations; limited communication is required between blocks. Localization allows a lower rank to be used than global lowrank approximations while maintaining the same quality of decomposition. The algorithm is scalable, making P- and S-decomposition possible in complicated 3D models. Tests with 2D and 3D synthetic data indicate good P- and S-decomposition results.
Publisher: Society of Exploration Geophysicists
ISSN: 0016-8033
Source: Geophysics
Link to Related Resource: http://dx.doi.org/10.1190/GEO2017-0138.1
Persistent Link: http://hdl.handle.net/10735.1/6080
Bibliographic Citation: Wang, W., B. Hua, G. A. McMechan, and B. Duquet. 2018. "P- and S-decomposition in anisotropic media with localized low-rank approximations." Geophysics 83(1): C13-C26.
Terms of Use: ©2018 Society of Exploration Geophysicists. All Rights Reserved.

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