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Modeling the along-track sidelobe interference artifact in multibeam sonar water-column data

Nau, AW, Lucieer, V ORCID: 0000-0001-7531-5750 and Schimel, ACG 2019 , 'Modeling the along-track sidelobe interference artifact in multibeam sonar water-column data', paper presented at the Oceans 2018, 22-25 October, Charleston, South Carolina.

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Sidelobe interference artefacts are a commonoccurrence in multibeam echosounder water-column data. Theyare very commonly observed in the across-track dimension,where they appear as a semi-circular noise pattern, affecting inparticular the data at a range beyond the minimum depth range.However, they also occur in the along-track dimension, wherethey affect data just above the seafloor near prominent featuresrising above the seabed. Here, we present a simple model forestimating the probable location of sidelobe interference artefactsin the along-track dimension. We test the accuracy of the modelby comparing average energy levels at set distances from theseafloor both within and outside of the modeled location. Wediscuss how such models have the potential to identify the extentof useable water-column data acquired over complex bathymetrysuch as rocky reefs, so as to improve analysis of water-columndata for the detection of near-benthic features, such as marinevegetation.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Nau, AW and Lucieer, V and Schimel, ACG
Keywords: multibeam acoustic backscatter
Journal or Publication Title: Oceans 2018
DOI / ID Number: 10.1109/OCEANS.2018.8604866
Copyright Information:

Copyright 2019 IEEE

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