Accession Number : ADA300804

Title :   Simulation of Acoustic Multipath Arrival Structure in the Middle Atlantic Bight.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Kaemmerer, Glen E., Jr

PDF Url : ADA300804

Report Date : JUN 1995

Pagination or Media Count : 79

Abstract : 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. (MM)

Descriptors :   *ACOUSTIC WAVES, *ACOUSTIC SIGNALS, *ACOUSTIC ATTENUATION, *OCEAN MODELS, *OCEAN BOTTOM, *BOTTOM BOUNCE, COMPUTER PROGRAMS, ANGLES, LITERATURE SURVEYS, SIGNAL TO NOISE RATIO, ANGLE OF ARRIVAL, ARRAYS, THESES, EIGENVALUES, DEPTH, CONTINENTAL SHELVES, FEASIBILITY STUDIES, ACOUSTIC ARRAYS, TOMOGRAPHY, HYDROPHONES, ATLANTIC OCEAN, GEOPHYSICS, ACOUSTIC SCATTERING, CLIMATOLOGY, AMPLITUDE, RAY TRACING, ACOUSTIC VELOCITY, WATER MASSES, TRANSMISSION LOSS, MULTIPATH TRANSMISSION, HAMILTONIAN FUNCTIONS, BAYS, GRAZING ANGLES.

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE