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dc.contributor.authorKieser, Robert
dc.contributor.authorOna, Egil
dc.date.accessioned2012-08-02T13:35:03Z
dc.date.available2012-08-02T13:35:03Z
dc.date.issued1988
dc.identifier.citationThis report is not to be cited without prior reference to the authorsno_NO
dc.identifier.urihttp://hdl.handle.net/11250/104426
dc.description.abstractSplit beam data can provide high quality, in situ, fish target strength estimates, however a careful calibration is required to realize this potential. In same cases a standard target has been used to make a large number of measurements that cover the entire beam area of interest, then a general three dimensional surface is locally fitted to provide an expression for the beam pattern and a target strength calibration for all points. We use a simpler method that takes advantage of the known beam shape and requires relatively few data points. We also describe a new approach that optimizes the backscattering cross section, rather than the beam pattern estimation process. Preliminary work indicates that the attainable accuracy is comparable to that obtained with more elaborate methods.no_NO
dc.language.isoengno_NO
dc.publisherICESno_NO
dc.relation.ispartofseriesICES CM Documents;1988/B:44
dc.subjectecho sounderno_NO
dc.subjectekkoloddno_NO
dc.titleComparative analysis of split beam datano_NO
dc.typeWorking paperno_NO
dc.subject.nsiVDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924no_NO
dc.subject.nsiVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452no_NO
dc.source.pagenumber16 s.no_NO


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