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Seismoacoustic bottom inversion with AUV towed streamers: a multi-stage approach

2017Conference object Restricted access
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dc.contributor.authorSoares, Cristiano
dc.contributor.authorJesus, Sergio
dc.contributor.authorMantouka, Agni
dc.contributor.authorFelisberto, Paulo
dc.date.accessioned2019-11-20T15:07:55Z
dc.date.available2019-11-20T15:07:55Z
dc.date.issued2017
dc.description.abstractThe WiMUST (Widely scalable Mobile Underwater Sonar Technology) Project envisions using a team of autonomous underwater vehicles towing short acoustic arrays for seismic surveying of seabottom geoacoustic properties. One of the objectives in the project is to tackle the inversion of acoustic data collected with short towed horizontal arrays by means of a Matched-Field Inversion (MFI) technique. While there is great deal of experience in MFI and the so-called focalization applied to horizontal propagation scenarios, in near vertical propagation scenarios, with a source receiver horizontal distance limited to a few tens of meter or less, there is little understanding in terms of feasibility of the acoustic inversion of bottom properties. In particular, the simultaneous inversion of bottom properties (soundspeeds, densities, attenuations) of multiple bottom layers needs to be tackled, since the experimenter has to account for the admissible mismatch of other environmental properties such as water soundspeed and depth, and the potential solution ambiguity inherent to an optimization problem with ten or more unknown parameters. The actual simulation study, carried out with an environmental scenario and geometric set up based on the Peljesac data set, considers a shallow water acoustic propagation scenario with a short array. A sensitivity analysis in MFI provides understanding on the observability of the unknown parameters of interest. A mismatch analysis indicates that watercolumn mismatch (soundspeed and depth) may cause the MFI procedure to break down. Based on the conclusions taken from the sensitive and mismatch analysis, an iterative acoustic inversion concept with feedback of intermediate parameter estimates is developed and tested with simulated data.
dc.description.sponsorshipH Research program of the European Union under project WiMUST [ICT-645141]
dc.identifier.isbn978-1-5090-5278-3
dc.identifier.issn0197-7385
dc.identifier.urihttp://hdl.handle.net/10400.1/13281
dc.language.isoeng
dc.peerreviewedyes
dc.publisherIEEE
dc.relationWidely scalable Mobile Underwater Sonar Technology
dc.relation.ispartofseriesOceans-IEEE
dc.subjectShallow-water
dc.titleSeismoacoustic bottom inversion with AUV towed streamers: a multi-stage approach
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleWidely scalable Mobile Underwater Sonar Technology
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/645141/EU
oaire.citation.conferencePlaceAberdeen, England
oaire.citation.titleOceans 2017 - Aberdeen
oaire.citation.titleOceans Aberdeen Conference
oaire.fundingStreamH2020
person.familyNameSOARES
person.familyNameJesus
person.familyNameFelisberto
person.givenNameCRISTIANO
person.givenNameSergio
person.givenNamePaulo
person.identifier79549
person.identifier.ciencia-idD411-CBA8-85B8
person.identifier.orcid0000-0002-2789-8506
person.identifier.orcid0000-0002-6021-1761
person.identifier.orcid0000-0001-7542-4332
person.identifier.ridM-9474-2013
person.identifier.scopus-author-id7003729485
person.identifier.scopus-author-id6508039890
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsrestrictedAccess
rcaap.typeconferenceObject
relation.isAuthorOfPublication21359474-b0e6-4d62-a0b1-fa87a750b1ca
relation.isAuthorOfPublicatione0226ece-3767-4beb-ab80-868e8897c14a
relation.isAuthorOfPublication6574c278-a803-4dbe-9140-4cd8272027db
relation.isAuthorOfPublication.latestForDiscovery21359474-b0e6-4d62-a0b1-fa87a750b1ca
relation.isProjectOfPublication23779886-721e-4844-9c0c-b73f53dbc6e3
relation.isProjectOfPublication.latestForDiscovery23779886-721e-4844-9c0c-b73f53dbc6e3

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