Patent ID: 7646672

Claim:
A method for converting 3D dual sensor towed streamer data into noise-attenuated data, comprising: converting 3D dual sensor towed streamer data, representative of earth's subsurface and acquired by deploying a plurality of seismic sensors proximate an area of the earth's subsurface to be evaluated, the seismic sensors generating at least one of an electrical and optical signal in response to seismic energy, into scaled seismic data with aliasing noise attenuated, comprising: transforming pressure records and vertical particle velocity records from the streamer data to the time-inline wavenumber-crossline space domain and applying a series of scaling filters to the transformed vertical particle velocity records at each inline wavenumber, wherein each of the series of scaling filters is calculated for a different cross-streamer wavenumber range and in blocks of inline traces in which all seismic events are approximately linear; combining the transformed pressure records and the scaled vertical particle velocity records to separate upgoing and downgoing wavefield components; and inverse-transforming the separated upgoing and downgoing wavefield components back to the time-space domain, wherein the inverse-transformed upgoing wavefield component is the noise-attenuated data.