Rapid Geoacoustics Inversion Methods Used in LWAD98-2 Sea Test,
NAVAL RESEARCH LAB WASHINGTON DC
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A concept for rapid environmental characterization of the sea bottomsubbottom has been successfully tested during the LWAD9S-2 seatest. As a proof-of-concept test, inversion of statistical parameters of a JacksonTurgut bottomisubbottom scattering model from backscatter data is performed. Seabed geoacoustic properties are also inverted from normal-incidence acoustic data. Results are in agreement with the previously reported geoacoustic data for the area. Iterative time-reversal techniques were also used to improve backscattered signal quality in an engineering trial. All the time-reversal hardware and software components functioned well except for the proper band-pass filtering of the received backscatter signal.