Travel time stability in weakly range-dependent sound channels

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Travel time stability is investigated in environments consisting of a range-independent background sound-speed profile on which a highly structured range-dependent perturbation is superimposed. The stability of both unconstrained and constrained (eigenray) travel times is considered. Both general theoretical arguments and analytical estimates of time spreads suggest that travel time stability is largely controlled by a property ω′ of the background sound-speed profile. Here, 2π/ω(I) is the range of a ray double loop and I is the ray action variable. Numerical results for both volume scattering by internal waves in deep-ocean environments and rough surface scattering in upward-refracting environments are shown to confirm the expectation that travel time stability is largely controlled by ω′.

Original languageEnglish (US)
Pages (from-to)1068-1077
Number of pages10
JournalJournal of the Acoustical Society of America
Volume115
Issue number3
DOIs
StatePublished - Mar 1 2004

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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