Translations:Dictionary:DMO (dip moveout) processing/6/en

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FIG. D-20. DMO. (a) Depth section showing the updip movement of the reflecting point for an offset geophone for constant velocity; , where ; is the dip (Levin, 1971). To avoid reflection point smearing, an offset trace should be gathered with the updip zero-offset trace at a distance , but such a gather is not hyperbolic; the DMO correction makes this gather hyperbolic. (b) A diffraction in location-offset space, a Cheops pyramid, is not a hyperboloid. (c) Applying NMO changes the Cheops pyramid into a saddle-shaped surface. (d) Applying DMO along with NMO yields data that can be stacked without reflection-point smear. (e) NMO corrects for the time delay on an offset trace assuming horizontality, DMO moves the data to the correct zero-offset trace for a dipping reflection, and migration further moves it to its subsurface location.[1]
  1. Deregowski, S. M. (1986). "What is DMO". First Break 4 (7): 7–24. doi:10.3997/1365-2397.1986014.