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• W2897568780 abstract "In the field of exploration geophysics, the method known as “signal apparition” offers a different perspective on how to separate signals acquired from simultaneously fired seismic sources. The method uses a periodic sequence of small time shift variations to encode the different sources, and this choice leads to exact separation of signals in diamond-shaped regions of the frequency-wavenumber domain which are twice as large compared to those recovered by other methods. In this paper we investigate the signal apparition method's sensitivity to perturbations of the periodic time shift sequence. We model (measured or unknown) perturbations in a stochastic fashion and prove that the resulting inverse problem of separating the data is still well-posed, and we demonstrate the stability by numerical simulations on a finite-difference synthetic data set generated over a complex salt model." @default.
• W2897568780 created "2018-10-26" @default.
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• W2897568780 date "2018-01-01" @default.
• W2897568780 modified "2023-10-16" @default.
• W2897568780 title "Perturbations of Time Shifts in Signal Apparition" @default.
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• W2897568780 doi "https://doi.org/10.1137/18m1165591" @default.
• W2897568780 hasPublicationYear "2018" @default.
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