HR: 08:15h
AN: S11D-02 INVITED    [Abstracts]
TI: Ocean acoustic interferometry using noise and active sources
AU: Gerstoft, P
EM: gerstoft@ucsd.edu
AF: Scripps Institution of Oceanography, 9500 Gilman, La Jolla, CA 92093, United States
AU: * Brooks, L A
AF: Scripps Institution of Oceanography, 9500 Gilman, La Jolla, CA 92093, United States
AU: Fried, S
AF: Scripps Institution of Oceanography, 9500 Gilman, La Jolla, CA 92093, United States
AU: Kuperman, B
AF: Scripps Institution of Oceanography, 9500 Gilman, La Jolla, CA 92093, United States
AU: Sabra, K
AF: Georgia Institute of Technology, George W. Woodruff School of Mechanical Engineering, Atlanta, GA 30332, United States
AB: The Green's function between two receivers in the ocean is estimated by cross-correlating the signal recorded at each receiver. The signal source is either the ambient noise field, or a specific configuration of active sources. When using ambient noise fields it can be demonstrated that the Green's function emerges for a spatially distributed noise field by time-averaging of random sources. When using active sources, they should ideally surround the two receivers completely in order to get unbiased estimates; however, a source lowered vertically down the water column was used as this is experimentally less complex. Both the ambient and active source methods have been applied to experimental data obtained on horizontal bottom arrays and vertical line arrays. The recorded correlations have been used to determine travel paths between the receivers, for array localisation, and to determine ocean bottom properties.
UR: http://www.mpl.ucsd.edu/people/gerstoft/
DE: 7200 SEISMOLOGY
SC: Seismology [S]
MN: 2007 Fall Meeting