1996
DOI: 10.1121/1.417919
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On the measurement of modal group time delays in the deep ocean

Abstract: The modal description of sound propagation in deep ocean environments is considered. Recently published inversion algorithms have assumed that modal group time delays can be measured. Such a measurement is straightforward to make if either: ͑1͒ the modal group arrival of interest is resolved in time; or ͑2͒ the wave field is sampled on a dense vertical array which spans much of the water column, thereby enabling the orthogonality of the modes to be exploited. In order to temporally resolve modal group arrivals… Show more

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Cited by 17 publications
(5 citation statements)
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“…where I(p r ) is defined in (9). The action-angle form of the ray equations can trivially be integrated:…”
Section: Rays: αmentioning
confidence: 99%
“…where I(p r ) is defined in (9). The action-angle form of the ray equations can trivially be integrated:…”
Section: Rays: αmentioning
confidence: 99%
“…In this section, mode filtering and computation of statistics of modal arrivals is discussed. Recall (e.g., Brown et al, 1996;Udovydchenkov and Brown, 2008) each frequency to isolate contributions to the wavefield from each mode number; and (3) inverse Fourier transform to construct transient contributions to the wavefield at each mode number (modal pulses). The mode filtering procedure relies on the orthogonality of normal modes and on the completeness of the set of eigenmodes.…”
Section: Modal Pulses In Loapexmentioning
confidence: 99%
“…͑30͒ and ͑31͔͒ is discussed in Ref. 12. The solution is m ͑z;͒ = ͑dS͑z;p m ͒/dz͒ −1/2 2 −m/2 e −͑m+1/2͒S 2 ͑z;p m ͒ ϫH m ͑͑2m + 1͒ 1/2 S͑z;p m ͒͒, ͑32͒…”
Section: Asymptotic Mode Theorymentioning
confidence: 95%