HR: 13:40h
AN: S12C-01 INVITED     [PDF]
TI: Extracting and Using Time Domain Green's Functions From Ocean Acoustic Noise
AU: * Kuperman, W A
EM: wkuperman@ucsd.edu
AF: Scripps Institution of Oceanography, Marine Physical Laboratory, La Jolla, CA 92037-0238 United States
AU: Roux, P
EM: philippe@mpl.ucsd.edu
AF: Scripps Institution of Oceanography, Marine Physical Laboratory, La Jolla, CA 92037-0238 United States
AB: The long-time temporal correlation of random wave fields received at two receivers basically extracts the time domain Green's function (TDGF) between the receivers. This process applies to either scattered fields or noise, the former often referred to as signal-generated noise. We have shown with theory and data that the long-term temporal correlation of ocean noise between two points yields the effective TDGF between those two points. The deterministic nature of the random-noise extracted TDGF is further demonstrated by utilizing these TDGF's for time reversal (TR) focusing through the background ocean medium. The combination of extracting TDGF's from random fields and deterministic based TR processing suggests a potential for passive tomography and imaging.
DE: 0910 Data processing
DE: 0933 Remote sensing
DE: 0935 Seismic methods (3025)
DE: 4259 Ocean acoustics
SC: Seismology [S]
MN: 2003 Fall Meeting