GEOACOUSTIC DATABASES FOR MATCHED-FIELD PROCESSING - PRELIMINARY-RESULTS IN SHALLOW-WATER OFF SAN-DIEGO, CALIFORNIA

Detailed seafloor environmental modeling of a moderately complex shall ow water area, coupled with multitone matched-held processing, produce d reliable and unambiguous source detection and tracking. Frequency av eraging of the matched-field output sufficiently reduced sidelobe ambi guities. The seabed geologic model is a gridded database containing wa ter depth, sediment grain size, sediment thickness, and acoustic basem ent type. Grid cells are squares of side length equal to 2 are s. Soft ware, separate from the geologic model, computes a geoacoustic model f or any desired grid square.