Kinematic redatuming by two source interferometry

Abstract

Interferometry is a method of redatuming physical sources to receiver locations. Under idealized assumptions stacking the cross correlogram of the two common receiver gathers yields a bandlimited Green's function between the receivers. Geometrically this process amounts to isolating a physical source, which generates a path containing both receivers, and canceling the common part. In this paper, we show that in order to recover the travel time between two receivers, one could creatively use rays from more than one physical source. With this approach redatuming is possible even in situations where the conventional interferometry fails.