Patent ID: 8089825

Claim:
A method for geophysical prospecting comprising: disposing a dual-sensor seismic streamer in a body of water; responsive to signals recorded at sensors in the dual-sensor seismic streamer, calculating pressure and vertical particle velocity traces representing physical pressure and vertical particle velocity wavefields, respectively, traveling in the body of water incident on the sensors; correcting for low-frequency noise in vertical particle velocity sensors by transforming the seismic traces to produce combined pressure and vertical particle velocity traces representing pressure and vertical particle velocity wavefields, respectively, as they would appear if incident on the sensors with attenuated low-frequency noise, the transforming comprising: generating merged particle velocity traces by merging recorded vertical particle velocity traces, scaled in an upper frequency range using a time-dependent arrival angle as determined by cross-ghosting analysis, with simulated particle velocity traces, calculated in a lower frequency range from recorded pressure traces using a time-varying filter based on the time-dependent arrival angle; generating combined pressure and vertical particle velocity traces by combining the recorded pressure and merged particle velocity traces; and recording the combined pressure and vertical particle velocity traces.