1. A method comprising: representing actual measurements of a seismic wavefield as a combination of a component of the seismic wavefield associated with a one way direction of propagation and a ghost operator; receiving first data indicative of the actual measurements of the seismic wavefield; and simultaneously determining interpolated and deghosted components of the seismic wavefield based at least in part on the actual measurements and the representation, comprising processing the first data in a machine to produce second data indicative of the interpolated and deghosted components of the seismic wavefield.