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Shallow water tomography in a highly variable scenario

2006Conference object Open access
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dc.contributor.authorSOARES, CRISTIANO
dc.contributor.authorJesus, Sérgio
dc.contributor.authorCoelho, Emanuel
dc.contributor.editorCaiti, A.
dc.contributor.editorChapman, N. R.
dc.contributor.editorHermand, J. P.
dc.contributor.editorJesus, S. M.
dc.date.accessioned2018-12-07T14:58:37Z
dc.date.available2018-12-07T14:58:37Z
dc.date.issued2006
dc.description.abstractIn October 2000, SiPLAB and the Instituto Hidrografico (IH - PN) conducted the IN-TIFANTE'00 sea trial in a shallow area off the Peninsula of Troia, approximately 50 km south from Lisbon, in Portugal. The experiment itself and results obtained in most of the data set have been reported at various occasions in the last two years. This paper focuses on the data acquired during Event 2, where the acoustic propagation path was approximately range independent and the source ship was held on station at a constant range of 5.8 km from the vertical line array. Although these conditions were, in general, relatively benign for matched-field tomography, retrieval of water column and bottom parameters over a 14-hour-long recording revealed to be extremely difficult. This paper analysis in detail the characteristics of this data set and determines the causes for the observed inversion difficulties. Is is shown that the causes for the poor performance of the conventional methods are mainly the tide induced spatially correlated noise and the relative source-receiver motion during time averaging. An eigenvalue-based criterion is proposed for detecting optimal averaging time. It is shown that this data selection procedure together with hydrophone normalization and an appropriate objective function provide a better model fit and consistent inversion results and thus a better understanding of the environmental variability.
dc.identifier.doi10.1007/978-1-4020-4386-4_15
dc.identifier.isbn1-4020-4372-4
dc.identifier.urihttp://hdl.handle.net/10400.1/12124
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.subjectAcoustic Tomography
dc.titleShallow water tomography in a highly variable scenario
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceIschia, ITALY
oaire.citation.endPage+
oaire.citation.startPage197
oaire.citation.titleAcoustic sensing techniques for the shallow water environment: Inversion methods and experiments
oaire.citation.title2Nd Workshop On Experimental Acoustic Inversion Techniques for Assessment of the Shallow Water Environment
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
rcaap.rightsopenAccess
rcaap.typeconferenceObject
relation.isAuthorOfPublication21359474-b0e6-4d62-a0b1-fa87a750b1ca
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication.latestForDiscovery21359474-b0e6-4d62-a0b1-fa87a750b1ca

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