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Source localization in a time-varying ocean waveguide

2002-11Journal article Open access
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dc.contributor.authorSoares, C.
dc.contributor.authorSiderius, M.
dc.contributor.authorJesus, S. M.
dc.date.accessioned2014-10-10T14:13:49Z
dc.date.available2014-10-10T14:13:49Z
dc.date.issued2002-11
dc.description.abstractOne of the most stringent impairments in matched-field processing is the impact of missing or erroneous environmental information on the final source location estimate. This problem is known in the literature as model mismatch and is strongly frequency dependent. Another unavoidable factor that contributes to model mismatch is the natural time and spatial variability of the ocean waveguide. As a consequence, most of the experimental results obtained to date focus on short source-receiver ranges (usually <5 km), stationary sources, reduced time windows and frequencies generally below 600 Hz. This paper shows that MFP source localization can be made robust to time–space environmental mismatch if the parameters responsible for the mismatch are clearly identified, properly modeled and (time-)adaptively estimated by a focalization procedure prior to MFP source localization. The data acquired during the ADVENT’99 sea trial at 2, 5, and 10 km source-receiver ranges and in two frequency bands, below and above 600 Hz, provided an excellent opportunity to test the proposed techniques. The results indicate that an adequate parametrization of the waveguide is effective up to 10 km range in both frequency bands achieving a precise localization during the whole recording of the 5 km track, and most of the 10 km track. It is shown that the increasing MFP dependence on erroneous environmental information in the higher frequency and at longer ranges can only be accounted for by including a time dependent modeling of the water column sound speed profile.por
dc.description.sponsorshipSACLANTCEN; PRAXIS XXI, FCT;por
dc.identifier.citationC. SOARES, M. SIDERIUS and S.M. JESUS, "Source localization in a time-varying ocean waveguide" in Journal Acoust. Soc. America, Vol. 112(5), pp. 1879 - 1889, December.por
dc.identifier.doihttp://dx.doi.org/10.1121/1.1508786
dc.identifier.issn0001-4966
dc.identifier.otherAUT: SJE00662;
dc.identifier.urihttp://hdl.handle.net/10400.1/5265
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherScitationpor
dc.relationAcoustic tomography ocean monitoring system ATOMS
dc.titleSource localization in a time-varying ocean waveguidepor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAcoustic tomography ocean monitoring system ATOMS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FMAR%2F15296%2F1999/PT
oaire.citation.endPage1889por
oaire.citation.issue5por
oaire.citation.startPage1879por
oaire.citation.titleJournal of the Acoustical Society of Americapor
oaire.citation.volume112por
oaire.fundingStreamPOCI
person.familyNameSOARES
person.familyNameJesus
person.givenNameCRISTIANO
person.givenNameSergio
person.identifier.orcid0000-0002-2789-8506
person.identifier.orcid0000-0002-6021-1761
person.identifier.scopus-author-id7003729485
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication21359474-b0e6-4d62-a0b1-fa87a750b1ca
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscovery21359474-b0e6-4d62-a0b1-fa87a750b1ca
relation.isProjectOfPublication3b9d94d9-ccfc-48b7-9580-cceabe10578b
relation.isProjectOfPublication.latestForDiscovery3b9d94d9-ccfc-48b7-9580-cceabe10578b

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