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Multi-resolution Probabilistic Ocean Physics-Acoustic Modeling: Validation in the New Jersey Continental Shelf

Lermusiaux, P.F.J., P.J. Haley, Jr., C. Mirabito, W.H. Ali, M. Bhabra, P. Abbot, C.-S. Chiu, and C. Emerson, 2020. Multi-resolution Probabilistic Ocean Physics-Acoustic Modeling: Validation in the New Jersey Continental Shelf. In: OCEANS '20 IEEE/MTS, 5-30 October 2020, sub-judice.

The littoral environment is especially demanding on tactical sonar systems, in large part because of the spatial and temporal variability of the highly-dynamic nonlinear ocean fields. The variability occurs on multiple scales in space and time, and involves multiple interacting processes, from internal tides and waves to meandering fronts, eddies, boundary layers, and strong air-sea interactions (Robinson et al., 2002; Robinson and Lermsuiaux, 2004; Lermusiaux et al., 2006, 2010; Duda et al., 2019). The present goal is to improve the detection rate of targets through improved multi-resolution ocean modeling and probabilistic forecasting of littoral ocean variability relevant for underwater propagation. The acoustic emphasis is on transmission loss (TL) variability and on detection performance with 50 to 3000 Hz active signals. To exemplify the multi-resolution probabilistic modeling, we reconstruct the acoustic environment off the New Jersey continental shelf for the end of June 2009 (MAC DG-3 Test), modeling the ocean spatialtemporal variability and its impact on the transmission loss (TL) and detection performance. We utilize ocean and acoustic measurements to validate results.