Characterization and Simulation of False Alarms Caused by Rock Outcrops
Final rept. 1 Dec 2010-30 Jun 2013
PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB
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Environmentally caused false alarms FA and false targets FT present some of the most difficult challenges for modern torpedo systems in systems in shallow water. In many cases, the mechanism for FAFT is clear scattering from exposed rock on the seafloor, e.g., rock outcrops and ridges. The long-term goals of this research program aim primarily to increase our understanding of and simulation capability for weapons-frequency acoustic scattering from rock outcrops. This knowledge will be used to develop methods for simulating FAFT in areas of rock outcrops, for predicting where high FAFT areas might occur and for predicting the influence of parameters such as slope or aspect on FAFT levels. This effort will also allow the performance of sonar systems to be predicted for rocky environments, which will allow the negative impact of non-Rayleigh clutter on detection and classification to be minimized or robust signal processing methods to be developed or tested. Knowledge gained might also lead to methods for environmental assessment techniques for the characterization of rocky areas for example at test sites.