dc.contributor.author | Kieser, Robert | |
dc.contributor.author | Ona, Egil | |
dc.date.accessioned | 2012-08-02T13:35:03Z | |
dc.date.available | 2012-08-02T13:35:03Z | |
dc.date.issued | 1988 | |
dc.identifier.citation | This report is not to be cited without prior reference to the authors | no_NO |
dc.identifier.uri | http://hdl.handle.net/11250/104426 | |
dc.description.abstract | Split 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.iso | eng | no_NO |
dc.publisher | ICES | no_NO |
dc.relation.ispartofseries | ICES CM Documents;1988/B:44 | |
dc.subject | echo sounder | no_NO |
dc.subject | ekkolodd | no_NO |
dc.title | Comparative analysis of split beam data | no_NO |
dc.type | Working paper | no_NO |
dc.subject.nsi | VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fisheries technology: 924 | no_NO |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 | no_NO |
dc.source.pagenumber | 16 s. | no_NO |