Particle motion sensor signals and the pressure sensor signals data from a
towed marine seismic streamer are combined to generate an up-going
pressure wavefield component and a down-going particle motion wavefield
component. The down-going particle motion wavefield component is
extrapolated from the receiver position depth level to the source
position depth level. The up-going pressure wavefield component is
multiplied by the extrapolated down-going particle motion wavefield
component, generating a first product. Then, n.sup.th order surface
related multiples in the pressure wavefield are iteratively calculated
utilizing a product of (n-1).sup.th surface related multiple free data
and the extrapolated down-going particle motion wavefield component. The
calculated n.sup.th order surface related multiples are iteratively
subtracted from the recorded pressure wavefield, generating the n.sup.th
order surface related multiple free data.