Fremgangsmåte ved marine seismiske undersökelser

摘要

Marine seismic data is gathered using a cable (16) towed behind a vessel (10) having a slanted orientation in the water. The recorded data is processed to remove the time offset in the recorded data of seismic signals arriving at the cable (16) at varying plane wave angles. The recorded data is then processed to align the primary signals, thereby misaligning the ghost signals. The data is also processed to align the ghost signals, thereby misaligning the primary signals. The two resulting data sets may then be summed.