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dc.contributor.authorUdovydchenkov, Ilya A.
dc.contributor.authorBrown, Michael G.
dc.contributor.authorDuda, Timothy F.
dc.contributor.authorMercer, James A.
dc.contributor.authorAndrew, Rex K.
dc.contributor.authorWorcester, Peter F.
dc.contributor.authorDzieciuch, Matthew A.
dc.contributor.authorHowe, Bruce M.
dc.contributor.authorColosi, John A.
dc.date.accessioned2012-06-26T19:44:04Z
dc.date.available2012-06-26T19:44:04Z
dc.date.issued2012-06
dc.identifier.citationJournal of the Acoustical Society of America 131 (2012): 4409-4427en_US
dc.identifier.urihttp://hdl.handle.net/1912/5248
dc.descriptionAuthor Posting. © Acoustical Society of America, 2012. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 131 (2012): 4409-4427, doi:10.1121/1.4707431.en_US
dc.description.abstractThe results of mode-processing measurements of broadband acoustic wavefields made in the fall of 2004 as part of the Long-Range Ocean Acoustic Propagation Experiment (LOAPEX) in the eastern North Pacific Ocean are reported here. Transient wavefields in the 50–90 Hz band that were recorded on a 1400 -m long 40 element vertical array centered near the sound channel axis are analyzed. This array was designed to resolve low-order modes. The wavefields were excited by a ship-suspended source at seven ranges, between approximately 50 and 3200 km, from the receiving array. The range evolution of broadband modal arrival patterns corresponding to fixed mode numbers (“modal group arrivals”) is analyzed with an emphasis on the second (variance) and third (skewness) moments. A theory of modal group time spreads is described, emphasizing complexities associated with energy scattering among low-order modes. The temporal structure of measured modal group arrivals is compared to theoretical predictions and numerical simulations. Theory, simulations, and observations generally agree. In cases where disagreement is observed, the reasons for the disagreement are discussed in terms of the underlying physical processes and data limitations.en_US
dc.description.sponsorshipThis work was supported by the Office of Naval Research, Code 322, Grant Nos. N00014-08-1-0195, N00014-06-1-0245, and N0014-11-1-0194.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAcoustical Society of Americaen_US
dc.relation.urihttps://doi.org/10.1121/1.4707431
dc.subjectAcoustic fielden_US
dc.subjectUnderwater acoustic propagationen_US
dc.titleModal analysis of the range evolution of broadband wavefields in the North Pacific Ocean : low mode numbersen_US
dc.typeArticleen_US
dc.identifier.doi10.1121/1.4707431


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