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A broadband geoacoustic inversion scheme in shallow water

  • Northwestern Polytechnical University Xian

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Inversion of modal dispersion curves is an effective method for obtaining underwater acoustic parameters. In this paper, an inversion scheme for synchronously obtaining the sound speed profile and bottom parameters using two wideband explosive sound sources is proposed based on modal dispersion characteristics. First, the first three orders of empirical orthogonal functions were determined and used to invert the sound speed profile. Second, the signal received on a single hydrophone in a vertical line array was decomposed into a series of propagation modes within the frame-work of normal mode theory, and the dispersive characteristics of the modes were analyzed using time-frequency analysis. The warping transform was used to extract the modal dispersion curve. The arrival time differences of the propagation modes were used to invert the environmental parameters. A genetic algorithm was used for the inversion. At last, the reliability of the inversion results was verified by a posteriori probability statistics.

Original languageEnglish
Title of host publicationOCEANS 2016 - Shanghai
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467397247
DOIs
StatePublished - 3 Jun 2016
EventOCEANS 2016 - Shanghai - Shanghai, China
Duration: 10 Apr 201613 Apr 2016

Publication series

NameOCEANS 2016 - Shanghai

Conference

ConferenceOCEANS 2016 - Shanghai
Country/TerritoryChina
CityShanghai
Period10/04/1613/04/16

Keywords

  • bottom parameters
  • explosive signals
  • modal dispersion curve
  • sound speed profile

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