MIT Libraries logoDSpace@MIT

MIT
View Item 
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
  • DSpace@MIT Home
  • MIT Open Access Articles
  • MIT Open Access Articles
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Scattering from extended targets in range-dependent fluctuating ocean-waveguides with clutter from theory and experiments

Author(s)
Jagannathan, Srinivasan; Küsel, Elizabeth T.; Ratilal, Purnima; Makris, Nicholas
Thumbnail
DownloadJASMAN1322680_1.pdf (1.350Mb)
PUBLISHER_POLICY

Publisher Policy

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Metadata
Show full item record
Abstract
Bistatic, long-range measurements of acoustic scattered returns from vertically extended, air-filled tubular targets were made during three distinct field experiments in fluctuating continental shelf waveguides. It is shown that SonarEquation estimates of mean target-scattered intensity lead to large errors, differing by an order of magnitude from both the measurements and waveguidescattering theory. The use of the Ingenito scatteringmodel is also shown to lead to significant errors in estimating mean target-scattered intensity in the field experiments because they were conducted in range-dependent ocean environments with large variations in sound speed structure over the depth of the targets, scenarios that violate basic assumptions of the Ingenito model. Green’s theorem based full-field modeling that describes scattering from vertically extended tubular targets in range-dependent oceanwaveguides by taking into account nonuniform sound speed structure over the target’s depth extent is shown to accurately describe the statistics of the targets’ scattered field in all three field experiments. Returns from the man-made targets are also shown to have a very different spectral dependence from the natural target-like clutter of the dominant fish schools observed, suggesting that judicious multi-frequency sensing may often provide a useful means of distinguishing fish from man-made targets.
Date issued
2012-08
URI
http://hdl.handle.net/1721.1/87703
Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Journal of the Acoustical Society of America
Publisher
American Institute of Physics/Acoustical Society of America
Citation
Jagannathan, Srinivasan, Elizabeth T. Küsel, Purnima Ratilal, and Nicholas C. Makris. “Scattering from Extended Targets in Range-Dependent Fluctuating Ocean-Waveguides with Clutter from Theory and Experiments.” The Journal of the Acoustical Society of America 132, no. 2 (2012): 680. © 2012 Acoustical Society of America.
Version: Final published version
ISSN
00014966

Collections
  • MIT Open Access Articles

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

Login

Statistics

OA StatisticsStatistics by CountryStatistics by Department
MIT Libraries
PrivacyPermissionsAccessibilityContact us
MIT
Content created by the MIT Libraries, CC BY-NC unless otherwise noted. Notify us about copyright concerns.