Journal article
Ocean bottom profiling with ambient noise: A model for the passive fathometer
The Journal of the Acoustical Society of America, Vol.129(4), pp.1825-1836
04/2011
DOI: 10.1121/1.3552871
PMID: 21476639
Abstract
A model is presented for the complete passive fathometer response to ocean surface noise, interfering discrete noise sources, and locally uncorrelated noise in an ideal waveguide. The leading order term of the ocean surface noise contribution produces the cross-correlation of vertical multipaths and yields the depth of sub-bottom reflectors. Discrete noise incident on the array via multipaths give multiple peaks in the fathometer response. These peaks may obscure the sub-bottom reflections but can be attenuated with use of minimum variance distortionless response (MVDR) steering vectors. The seabed critical angle introduces discontinuities in the spatial distribution of distant surface noise and may introduce spurious peaks in the passive fathometer response. These peaks can be attenuated by beamforming within a bandwidth limited by the array geometry and critical angle.
Details
- Title: Subtitle
- Ocean bottom profiling with ambient noise: A model for the passive fathometer
- Creators
- James Traer - Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California 92093-0238Peter Gerstoft - Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California 92093-0238William Hodgkiss - Marine Physical Laboratory, Scripps Institution of Oceanography, La Jolla, California 92093-0238
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.129(4), pp.1825-1836
- DOI
- 10.1121/1.3552871
- PMID
- 21476639
- NLM abbreviation
- J Acoust Soc Am
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Publisher
- American Institute of Physics
- Grant note
- N00014-05-1-0264 and N00014-08-1-0196 / UNSPECIFIED
- Date published
- 04/2011
- Academic Unit
- Psychological and Brain Sciences; Iowa Neuroscience Institute
- Record Identifier
- 9984065466102771
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