A method is disclosed for processing seismic data from concurrently recorded
co-located
pressure sensors and geophones. The seismic data are processed by first determining
an upgoing wavefield and a downgoing wavefield in the seismic data. Adaptive subtraction
is then applied to at least one of the upgoing wavefield and the downgoing wavefield
to remove the noise from the signal. In alternative embodiments, the upgoing wavefield
can be used as a noise model for the downgoing wavefield or the downgoing wavefield
can be used as a noise model for the upgoing wavefield.
