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The dip *p* of an event at a point is related to the relative time-shift between neighboring traces around that point:
| |
(1) |

where is the spatial-sampling interval.
Therefore estimating the relative time-shift is equivalent to
estimating the dip. The optimal estimate of is
defined to be the relative time-shift
that will make the neighboring traces resemble each other. The discrepancies
between these traces after shifting are measured by an objective function.

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Stanford Exploration Project

1/13/1998