Estimating the Oceanic Sound Speed Environmental for Long-Range Acoustic Propagation

The High Gain Initiative (HGI) Program was established in1987 as a focused Block Program of the office of Naval Technology (now part of the Office of Naval Research). One of its objectives was to investigate the oceanic environment and its effects on long-range sound transmission. One potential impo...

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Bibliographic Details
Main Author: Boyd, Janice D.
Other Authors: NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
Format: Text
Language:English
Published: 1993
Subjects:
Physical and Dynamic Oceanography
Acoustic Detection and Detectors
*ACOUSTIC ARRAYS
*UNDERWATER ACOUSTICS
*ACOUSTIC VELOCITY
*OCEAN ENVIRONMENTS
TEST AND EVALUATION
DATA BASES
MEASUREMENT
UNCERTAINTY
SOUND TRANSMISSION
NAVAL RESEARCH
TOMOGRAPHY
HIGH GAIN
OCEANOGRAPHY
REMOTE DETECTION
OCEAN MODELS
CLIMATOLOGY
ACOUSTICS
GAIN
ACOUSTIC WAVES
OCEANOGRAPHIC DATA
WAVE PROPAGATION
LONG RANGE(DISTANCE)
REMOTE SENSING
PE62435N
PE62314N
WUDN258033
Pacific
North Atlantic
Subarctic
Online Access:http://www.dtic.mil/docs/citations/ADA270231
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA270231
Description
Summary:The High Gain Initiative (HGI) Program was established in1987 as a focused Block Program of the office of Naval Technology (now part of the Office of Naval Research). One of its objectives was to investigate the oceanic environment and its effects on long-range sound transmission. One potential important factor was identified as imprecise knowledge of the oceanic sound speed field. Substantial Program resources were therefore invested in devising and executing sound speed measurement programs for two major field experiments, VAST (Various Acoustic Systems Tests) and MDA (Multi-Dimensional Array), which took place in 1989 in the Northeast Pacific and in 1991 in the western Subtropical Atlantic, respectively. This document reviews available oceanic sound speed measurement techniques, describes the combinations of techniques and strategies that made up each experiment's measurement plan, summarizes the results and the sound speed environment during each experiment, and evaluates what the work has revealed to date about sound speed uncertainties and long- range sound transmission. HGI, VAST, MDA, Long-range acoustic propagation, Sound speed, Physical oceanography, North Pacific subarctic front, North Atlantic subtropical front. Original contains color plates: All DTIC and NTIS reproductions will be in black and white.

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