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- W2054686404 abstract "The temporal spread of modal group arrivals in weakly range-dependent deep ocean environments is considered. It is assumed that the range dependence is sufficiently weak that mode coupling is predominantly local in mode number. The phrase “modal group arrival” is taken here to mean the contribution to a transient wave field corresponding to a fixed mode number. There are three contributions to modal group time spreads which combine approximately in quadrature. These are the reciprocal bandwidth (the minimal pulse width), a deterministic dispersive contribution that is proportional to bandwidth and grows like range r, and a scattering-induced contribution that grows approximately like r3∕2. The latter two contributions are shown to be proportional to the waveguide invariant β, a property of the background sound speed profile. The results presented, based mostly on asymptotic theory, are shown to agree well with full-wave numerical wave field simulations and available exact mode theoretical results. Simulations are shown that correspond approximately to conditions during the LOAPEX acoustic propagation experiment." @default.
- W2054686404 created "2016-06-24" @default.
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- W2054686404 date "2008-01-01" @default.
- W2054686404 modified "2023-09-24" @default.
- W2054686404 title "Modal group time spreads in weakly range-dependent deep ocean environments" @default.
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- W2054686404 doi "https://doi.org/10.1121/1.2804634" @default.
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