Simulation of acoustic multipath arrival structure in the Middle Atlantic Bight
Kaemmerer, Glen E.
Miller, James H.
Smith, Kevin B.
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In support of the Mid-Atlantic Bight Field Study process studies to be conducted in July 1996 and February 1997, a feasibility study and simulation of the acoustic multipath arrival structure was conducted. The feasibility study consisted of a literature search of oceanographic, geophysical and climatological data to create an accurate model of the Middle Atlantic Bight. This model was used to predict transmission losses and signal-to-noise ratios expected during the field study. Simulations were conducted by tracing acoustic rays from a 400 Hz tomographic source to a vertical receiver array over a range of 45 kilometers across the continental shelf. Simulations were performed using the NOAA Hamiltonian Raytracing Program for the Ocean (HARPO) with the modeled ocean as input. Optimal placement of the experiment's components were determined. Ray path and arrival structure were examined through the construction of eigenrays and analysis of arrival depths, times, angles amplitudes. An analysis of the resolvability of individual rays utilizing arrival times and a combination of arrival times and angles was conducted to evaluate the feasibility of the tomography experiment in the Middle Atlantic Bight.
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