...correction.

A similar filter appears in velocity estimation with the differential semblance method Symes and Carazzone (1991); Symes (1999).

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...Fomel (1995a).

To the author's knowledge, the first derivation of the revised offset continuation equation was done by Joseph Higginbotham of Texaco in 1989. Unfortunately, Higginbotham's derivation never appeared in open literature.

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