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Given a model of the multiple and the data
, a bank of non-stationary filters
is estimated such that
| |
(1) |

is minimum Rickett et al. (2001). In equation (1), is the Helix
derivative Claerbout (1998) that smooths the
filter coefficients across micro-patches Crawley (2000)
and a trade-off parameter between data fitting and
smoothing. The filters have two dimensions. In the following results,
the filters are 20 3 and the patch size is 44 20 (the
first number corresponds to the time axis and the second number
corresponds to the offset axis). Once the filters are estimated, the signal becomes
| |
(2) |

The subtraction is done one shot gather at a time.

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Stanford Exploration Project

5/23/2004