COASTSYSTA Dahlgren Division, NSWC, 6703 West Highway 98, Panama City, FL 32407-7001

A -- CONTINUED CONCEPT DEVELOPMENT FOR HIGH RESOLUTION SONAR IMAGERY SOL N61331-96-R-0013 DUE 122995 POC Robert D. Kuczenski, Contract Specialist, (904)234-4864 Carol A. Dreger, Contracting Officer, (904)234-4863. The Coastal Systems Station (CSS), DD, NSWC, intends to award a contract to Georgia Tech Research Institute (GTRI) on a sole source basis. This contract will be a follow-on to contract N61331-93-K-0035, which was awarded on the basis of GTRI's proposal submitted in response to a CSS Broad Agency Announcement. The subject of the previous contract was ''A New Approach to High Resolution Sonar Imagery.'' This follow-on contrtact will require continued efforts to further develop the concepts explored under the previous contract. Specifically: development of a RVQ algorithm to classify objects by their acoustic backscatter signals; performance of a full set of performance tests using CSS's standard acoustic backscatter data base supplied GFI; testing of the robustness of the RVQ algorithm using synthesized reverberation and clutter at 12, 15, and 20 dB signal-to-noise ratio; investigating the selection of target features based on the maximal class discrimination criteria rather than the minimal residual criteria, and; investigating the selection of algorithm architecture and time-frequency decompositions (e.g., wavelet-like transforms) which will result in performance invariant to target aspect. The new contract will include an option for continued performance in FY 97 to improve the algorithms and evaluate their robustness against other CSS acoustic data bases. A second option for conitued performance in FY 98, to support NSWC/DD/CSS with the advanced technology demonstrations (ACTD) planned in FY 98, will also be included. (0310)

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