Page 208 - Acquisition and Processing of Marine Seismic Data

3.9 SEISMIC INTERFERENCE 199

FIG. 3.29 Spectral analysis of a shot with seismic interference. (A) Filtered shot gather together with interference and pri-
mary reflections, (B) f-k filtered shot to indicate only the interference signal, and (C) primary reflections after removal of the
interference with an appropriate f-k filter. Mean amplitude and f-k spectra of each gather are given in the top and bottom
panels, respectively.

(iii) The noise source is in front of the reflection hyperbolas and the interference
receiving streamer (Fig. 3.31C). The signal have the same dip on the shot
interference signal extends from near to gathers. In this case, it may not be
far offset traces. This is the worst situation possible to filter out the interference
in a removal process because the completely.