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- W120226597 abstract "Due to the extremely large size of realistic three-dimensional ocean propagation problems, there is a desire to incorporate marching (one-way) methods into the solution algorithm for the elliptic, frequency-domain formulation. This has provided the impetus for the development of the “marching elliptic methods”.1 Such methods generally require (1) the backpropagation of a wave field component and (2) the knowledge of both the wave field and its normal derivative on an initial plane. The first requirement leads to an ill-posed problem, requiring a regularization which effectively filters out the evanescent portion of the spectrum1 or a stability requirement which ultimately limits the spatial resolution.1 For strongly backscattering environments, such filtering can result in spurious oscillations in the wave field, reflecting the important role played by the high-frequency portion of the spectrum under such conditions.1 The second requirement is even more problematical. For the elliptic problem, both the wave field and its normal derivative cannot be independently specified on the initial plane.1 Given the initial wave field, the determination of the corresponding normal derivative requires scattering data from the entire domain. Constructing this scattering information, however, effectively solves the original problem." @default.
- W120226597 created "2016-06-24" @default.
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- W120226597 date "1993-01-01" @default.
- W120226597 modified "2023-09-28" @default.
- W120226597 title "Wave Field Splitting, Invariant Imbedding, and Phase Space Methods in Acoustical Imaging" @default.
- W120226597 cites W1967561582 @default.
- W120226597 doi "https://doi.org/10.1007/978-1-4615-2958-3_4" @default.
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