Luciano Fonseca

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A model for the high-frequency backscatter angular response of gassy sediments is proposed. For the interface backscatter contribution we adopted the model developed by Jackson et al. [J. Acoust. Soc. Am. 79, 1410-1422 (1986)], but added modifications to accommodate gas bubbles. The model parameters that are affected by gas content are the density ratio,(More)
The variation of the backscatter strength with the angle of incidence is an intrinsic property of the seafloor, which can be used in methods for acoustic seafloor characterization. Although multibeam sonars acquire backscatter over a wide range of incidence angles, the angular information is normally neglected during standard backscatter processing and(More)
Acoustic backscatter mosaics derived from multibeam and sidescan sonars are often used to estimate seafloor type and composition, which are important parameters in the description of benthic habitats. However, due to limitations of the mosaicking technique, backscatter mosaics are restricted in their capacity to unambiguously discriminate seafloor(More)
The long-term goal of this project is to develop techniques to collect and use remotely sensed acoustic data to make robust predictions of seafloor physical, acoustic and geotechnical properties in denied areas at spatial and temporal scales appropriate for tactical applications. The work described is a collaboration of research groups at the University of(More)
S -INVITED SPEAKERS --------------------------------------------------Marine habitat mapping: What is it and why do managers need it? Jon Kurland Assistant Regional Administrator for Habitat Conservation, NOAA National Marine Fisheries Service Doug Woodby Chief Scientist for Commercial Fisheries, Alaska Department of Fish & Game David Witherell Deputy(More)
The long-term objective of the GEOCLUTTER program is to understand the causes and implications of geologic clutter (reverberation) in a geologically well-characterized shallow-water environment. The original field area selected for the GEOCLUTTER program was the mid-outer continental shelf off New Jersey, USA. The New Jersey margin was chosen for the(More)
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