Angular Dependence of High-Frequency (>200 kHz) Seafloor Acoustic Backscatter
HLS RESEARCH INC LA JOLLA CA
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LONG-TERM GOALS The long-term objectives of the proposed research are to develop a physics-based model of high-frequency sound scattering from stratified heterogeneous sediments. Such a model is needed to interpret the ever-increasing amount of seafloor acoustic backscatter data collected by, or for the US Navy with high-frequency sonars 200 kHz mounted on autonomous underwater vehicles AUVs for rapid environmental assessments and reconnaissance missions in denied areas. OBJECTIVES The scientific goals of this work are to determine empirically the angular dependence of high-frequency seafloor acoustic backscatter over grazing angles spanning 25 deg to 90 deg, for which no reliable model exists Jackson et al., 2007, Ch. 7-8.