{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T00:43:47Z","timestamp":1773621827525,"version":"3.50.1"},"reference-count":45,"publisher":"Society of Exploration Geophysicists","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["GEOPHYSICS"],"published-print":{"date-parts":[[2011,7]]},"abstract":"<jats:p> This paper investigates the forward modeling of chirp-sonar data for the quantitative characterization of marine subbottom sediment between 1 and 10 kHz. The forward modeling, based on a transfer function approach, included impacts of layering or impedance mismatch, attenuation, roughness, and transitional layers, i.e., continuous impedance variations. The presented approach provided the best compromise between the number of available geoacoustic parameters from chirp-sonar data and the subbottom modeling accuracy. The forward model was tested on deep-sea chirp-sonar data acquired at a central frequency of 3.5 kHz. Comparisons between synthetic and experimental seismograms showed good agreement for the first 15 m of buried layers. Performance of the inversion using this forward model was also examined through sensitivity analysis. The results suggested that estimations of layer thickness, impedance, and transitional layer thickness were robust, whereas roughness and attenuation estimations were subject to wavelength and layer thickness conditions. <\/jats:p>","DOI":"10.1190\/1.3590717","type":"journal-article","created":{"date-parts":[[2011,6,13]],"date-time":"2011-06-13T22:14:44Z","timestamp":1308003284000},"page":"T91-T99","source":"Crossref","is-referenced-by-count":10,"title":["Forward modeling for marine sediment characterization using chirp sonars"],"prefix":"10.1190","volume":"76","author":[{"given":"Sandrine","family":"Rakotonarivo","sequence":"first","affiliation":[{"name":"Formerly Universit\u00e9 Europ\u00e9enne de Bretagne, \u00c9cole Nationale Sup\u00e9rieure de Techniques Avanc\u00e9es (ENSTA) Bretagne, Laboratoire Extraction et Exploitation de l\u2019Information en Environnements Incertains, Brest, France; presently University of California San Diego, Scripps Institution of Oceanography, Marine Physical Laboratory, La Jolla, California, U.S.A.."},{"name":"Universit\u00e9 Europ\u00e9enne de Bretagne, \u00c9cole Nationale Sup\u00e9rieure de Techniques Avanc\u00e9es (ENSTA) Bretagne, Laboratoire Extraction et Exploitation de l\u2019Information en Environnements Incertains, Brest, France.."},{"name":"Institut de Recherche de l\u2019\u00c9cole Navale (IRENav), Brest, France.."},{"name":"Centre National de la Recherche Scientifique, Laboratoire de M\u00e9canique et d\u2019Acoustique (LMA), Marseille, France.."},{"name":"Institut Fran\u00e7ais de Recherche pour l\u2019Exploitation de la Mer (IFREMER), Unit\u00e9 de recherche G\u00e9osciences Marines, Plouzane, France.."}]},{"given":"Michel","family":"Legris","sequence":"additional","affiliation":[{"name":"Formerly Universit\u00e9 Europ\u00e9enne de Bretagne, \u00c9cole Nationale Sup\u00e9rieure de Techniques Avanc\u00e9es (ENSTA) Bretagne, Laboratoire Extraction et Exploitation de l\u2019Information en Environnements Incertains, Brest, France; 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