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WesternGeco acquired and released the Mississippi Canyon dataset for public use. A  Proof of Equivalence with Levin and Shah's Traveltime Equations for Small Dips In the following appendix, I show in that the approximate traveltime equation for pegleg multiples in a nonflat earth, equation (3), is a valid first-order approximation of Levin and Shah's 1977 true raypath.


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