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Ocean Acoustic Tomography: Current Progress and Future Prospect
Author(s): 
Pages: 69-74
Year: Issue:  3
Journal: Ocean Technology

Keyword:  ocean acoustic tomographyimagingdistributed sensor networkpassive acoustic tomography;
Abstract: Ocean acoustic tomography(OAT) was proposed in 1979 by American scientist W. Munk and his collaborators. OAT estimates the properties of the ocean, through which acoustic signals propagate, by measuring the propagation time and other acoustic parameters. It soon became an effective method to study the state and variation of oceanic dynamics in large sea areas. OAT gained great attention from 1980-2000, during which a series of verification experiments, particularly with the ATOC project, were conducted to promote theoretical research, equipment building and applications. After entering the 21 stcentury, further research of theory and experiment has been made with regard to acoustic tomography as a data assimilation means with ocean dynamics,moving tomography with gliders and moving horizontal array as mobile nodes, as well as the coastal acoustic tomography. The open questions of OAT include:(1) the Hilbert method of OAT in a unified imaging framework,(2) effective and economical acoustic tomography with distributed sensor network,(3) passive acoustic tomography.
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