3-DIMENSIONAL RAY SIMULATION OF SOUND-PROPAGATION IN OCEAN WITH A GEOSTROPHIC CURRENT

Citation
T. Tsuchiya et al., 3-DIMENSIONAL RAY SIMULATION OF SOUND-PROPAGATION IN OCEAN WITH A GEOSTROPHIC CURRENT, JPN J A P 1, 37(5B), 1998, pp. 3148-3151
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
Volume
37
Issue
5B
Year of publication
1998
Pages
3148 - 3151
Database
ISI
SICI code
0021-4922(1998)37:5B<3148:3RSOSI>2.0.ZU;2-P
Abstract
Acoustical ray theory is used to analyze the three-dimensional (3-D) t ransmission characteristics of the propagation of sound in the Pacific Ocean. For the computer simulation, it is assumed that there is a tem perature gradient caused by the warm and cold water mass. The temperat ure gradient also generates a non-acceleration current or the geostrop hic current. The maximum nom speed of the current varies from 0 to 1.3 5 m/s in the area of. study of 100 km square. Sound pulses projected f rom the source on the sound fixing and ranging (SOFAR) axis reach the cylindrical receiving plane with a curved locus, because of the influe nce of both temperature gradient and current. The propagation path and propagation time are more affected than shown by the estimation resul ts by two-dimensional (2-D) simulation.