Recent Advances in Hydrophone-Only Receiver Deghosting

Many hydrophone-only receiver deghosting approaches assume a stationary free surface profile, or that the data may be represented by linear events within a small spatial aperture. In this paper we propose methods to address these limitations. Firstly, we describe a data-driven methodology to estimate a time-variant free surface profile which may be used in combination with a modified receiver deghosting formulation. Secondly, we propose the use of a tilted hyperboloidal model of the data, which better represents travel-time moveout at short offsets in shallow water regions. Both methods are illustrated on real datasets and demonstrate more effective deghosting than conventional approaches.