Low Frequency Acoustic Tomography Using Matched Field Processing

A proposed novel, synoptic, and cost effective approach to large area, deep water ocean tomography will be described. The tech­ nique employs matched field processing applied to narrow band low frequency components of acoustic fields generated by distant air de­ ployed SUS and measured on widely spaced large aperture vertical arrays. The essence of the approach is to find the three-dimensiona l sound-speed structure which maximizes the matched field power at the known source location for the given arrays. The essential com­ pntational challenge involves an efficient search throngh a large parameter space. Simnlated results will be presented.