Simulation of Acoustic Multipath Arrival Structure in the Barents Sea

• Main Author: Elliott, John M.
• Other Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CA
• Format: Text
• Language: English
• Published: 1992
• Subjects: Physical and Dynamic Oceanography; Holography; Acoustics; *ACOUSTIC ARRAYS; *TOMOGRAPHY; *UNDERWATER ACOUSTICS; *MULTIPATH TRANSMISSION; *OCEAN ENVIRONMENTS; VELOCITY; INPUT; ENVIRONMENTS; STRUCTURES; ARRAYS; OCEANS; BOTTOM LOSS; OMNIDIRECTIONAL; OCEANOGRAPHY; PLANE WAVES; BOTTOM; BARENTS SEA; ARRIVAL; HYDROPHONES; LOSSES; SOUND; SURFACES; SIGNALS; RECEIVERS; BEAM FORMING; Barents Sea
• Online Access: http://www.dtic.mil/docs/citations/ADA256723; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA256723

In support of the Barents Sea Polar Front Experiment (BSPFEX) in September 1992 (Barents Sea Polar Front Group, 1992), the planned 224 Hz tomography signal transmissions from a near bottom sound source to a vertical receiver array consisting of 16 hydrophones were simulated. Acoustic rays were traced to the receiver array at a range of 50 km using the NOAA Hamiltonian Raytracing Program for the Ocean (HARPO). Input to HARPO was a mathematical ocean environment based on historical bathymetric and sound speed data. Acoustic multipath arrival structure was constructed through eigenray searches and estimation of raytube spreading and surface and bottom losses. A resolvability analysis of the simulated arrival structure reveals that there are a total of 49 unique resolvable ray arrivals. Among them; 42 are from individual omnidirectional hydrophones and 7 from plane wave beamforming. Acoustic Tomography, Ocean Acoustics, Oceanography, Barents Sea.