ASA 124th Meeting New Orleans 1992 October

2pAO4. Performance of acoustic tomography via matched-field processing.

A. Tolstoy

Acoust. Div., Naval Res. Lab., Washington, DC 20375

Results will be presented showing the deep ocean performance of the matched-field processing (MFP) approach to acoustic tomography as discussed in Tolstoy et al. [J. Acoust. Soc. Am. 89, 1119 (1991)] and Tolstoy [J. Acoust. Soc. Am. 91, 781 (1992)]. These results are generated for the simulated environment provided by Chiu et al., which was selected and designed for comparison between presently available tomography techniques. The MFP approach requires the presence of at least three vertical arrays plus low-frequency sources, e.g., air-deployed shots, distributed around the region perimeter. The resolution of the final inverse solution is dependent on the number and placement of the sources and arrays, on the quality and availability of additional environmental information, e.g., sound-speed profile data at the arrays, and on our ability to mode filter or time window the acoustic data to eliminate bottom interacting energy.