The first nontrivial interpolation example uses a synthetic dataset provided by British Petroleum. The dataset is 2D, and was modeled using elastic finite differences on a tabular salt model. The velocity model is shown in figure bpvel. The water layer and the salt give rise to multiples, which become aliased when the data are subsampled to simulate a dual-source marine geometry. The presence of the salt leads to complicated moveouts and a wide angular band in much of the data, making it an interesting test for interpolation. A representative shot gather from over the the salt body is shown in Figure bpshot.
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