Superstep wavefield propagation
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929658941931520 |
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| author | Nemeth, Tamas Nihei, Kurt Loddoch, Alex Sekar, Anusha Bube, Ken Washbourne, John Decker, Luke Kaplan, Sam Wu, Chunling Shabelansky, Andrey Bader, Milad Cristea, Ovidiu Yin, Ziyi |
| author_facet | Nemeth, Tamas Nihei, Kurt Loddoch, Alex Sekar, Anusha Bube, Ken Washbourne, John Decker, Luke Kaplan, Sam Wu, Chunling Shabelansky, Andrey Bader, Milad Cristea, Ovidiu Yin, Ziyi |
| contents | This paper describes how to propagate wavefields for arbitrary numbers of traditional time steps in a single step, called a superstep. We show how to construct operators that accomplish this task for finite-difference time domain schemes, including temporal first-order schemes in isotropic, anisotropic and elastic media, as well as temporal second-order schemes for acoustic media. This task is achieved by implementing a computational tradeoff differing from traditional single step wavefield propagators by precomputing propagator matrices for each model location for k timesteps (a superstep) and using these propagator matrices to advance the wavefield k time steps at once. This tradeoff separates the physics of the propagator matrix computation from the computer science of wavefield propagation and allows each discipline to provide their optimal modular solutions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_05154 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superstep wavefield propagation Nemeth, Tamas Nihei, Kurt Loddoch, Alex Sekar, Anusha Bube, Ken Washbourne, John Decker, Luke Kaplan, Sam Wu, Chunling Shabelansky, Andrey Bader, Milad Cristea, Ovidiu Yin, Ziyi Geophysics Numerical Analysis This paper describes how to propagate wavefields for arbitrary numbers of traditional time steps in a single step, called a superstep. We show how to construct operators that accomplish this task for finite-difference time domain schemes, including temporal first-order schemes in isotropic, anisotropic and elastic media, as well as temporal second-order schemes for acoustic media. This task is achieved by implementing a computational tradeoff differing from traditional single step wavefield propagators by precomputing propagator matrices for each model location for k timesteps (a superstep) and using these propagator matrices to advance the wavefield k time steps at once. This tradeoff separates the physics of the propagator matrix computation from the computer science of wavefield propagation and allows each discipline to provide their optimal modular solutions. |
| title | Superstep wavefield propagation |
| topic | Geophysics Numerical Analysis |
| url | https://arxiv.org/abs/2406.05154 |