Perrot Yannick auteur aut IRD Brehmer Patrice auteur aut IRD Roudaut Gildas auteur aut IRD Gerstoft P. auteur aut IRD Josse Erwan auteur aut IRD text journalArticle eng text/pdf reformatted digital access Quantitative applications of mobile multibeam sonar in aquatic ecology and fisheries require accurate and efficient in-tank calibration methodologies. Calibration factors for a Simrad SM20 multibeam sonar are experimentally extracted thereby enabling sonar estimation of target strength and volume backscattering strength. Measured and modeled sonar characteristics are systematically compared and show good overall correlation. Due to the limited angular span of the sonar head array, well quantified sonar operation is restricted to an equatorial angular sector of only 80° (vs. rated 120°) in 'imaging' mode. In 'echo-sounder' mode, the 'high' power transmit setting appears to introduce artifacts. A routine in-tank measurement procedure is described which for given multibeam sonar minimizes the time required for quality multibeam calibration. specialized PECHE ESTIMATION DE STOCK PROSPECTION ACOUSTIQUE PROSPECTION ELECTRIQUE SONAR CALIBRAGE MILIEU MARIN METHODOLOGIE 036MILMAR 126TELAPP05 3 4 808-820 2014 2319-5967 https://www.documentation.ird.fr/hor/fdi:010064316 2319-5967 [F B010064316] https://www.documentation.ird.fr/hor/fdi:010064316 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers15-03/010064316.pdf IRD - Base Horizon / Pleins textes 2015-03-30 2020-05-15 fdi:010064316 fre