Objectif Development of a new generation of sonar systems for seafloor imaging.A prototype high resolution sea floor mapping system has been development, making use of sophisticated signal processing, synthetic imaging algorithms and wide band transducer design. Software simulations of the performance of wide band synthetic sonar have been constructed, to assess image processing schemes. Numerical models of sonar echoes backscattered from the sea floor have been completed to determine how to interpret the data. The feasibility of towing a device from a vessel was investigated. Tests were carried out in water tanks, and parameters of experimental prototypes calculated from theory and experiment. Sea trials have been conducted to prove the feasibility of such a prototype (May 1993).This will have to ensure both a great ease of use and high performances. To reach these aims, these systems will include innovative technology of wide-band signal processing and more particularly of synthetic aperture: while classical imaging systems (sonar) consider the ship movement as an external parameter and provide for each position a "snapshot", the synthetic aperture sonars integrate these movements in the processing. As opposed to classical sonars, for which increasing the resolution proceeds from an increase of the array length (problem of manoeuvrability), a synthetic aperture sonar allows it to reach the same resolution using a small-sized towed array. The complexity of the system is thus no longer the immersed mechanical parts, but the electronic instrumentation, the signal processing and the trajectory systems. All these will be developed in this project to provide an accurate mapping of seafloors and a seabottom classification. Champ scientifique natural sciencescomputer and information sciencessoftwareengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsignal processing Programme(s) FP2-MAST 1 - Specific research and technological development programme (EEC) in the field of marine science and technology (MAST), 1989-1992 Thème(s) Data not available Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur IFREMER - INSTITUT FRANÇAIS DE RECHERCHE POUR L'EXPLOITATION DE LA MER Contribution de l’UE Aucune donnée Adresse Rue Jean-Jacques Rousseau 155, Technopolis 40 92138 ISSY LES MOULINEAUX France Voir sur la carte Coût total Aucune donnée Participants (7) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE France Contribution de l’UE Aucune donnée Adresse Chemin Joseph Aiguier 31 13402 MARSEILLE Voir sur la carte Coût total Aucune donnée Danish Maritime Institute Danemark Contribution de l’UE Aucune donnée Adresse 99,Hjortekærsvej 2800 Lyngby Voir sur la carte Coût total Aucune donnée FOUNDATION OF RESEARCH AND TECHNOLOGY - HELLAS Grèce Contribution de l’UE Aucune donnée Adresse Vassilika Vouton 71110 IRAKLION Voir sur la carte Coût total Aucune donnée Institut de Chimie et de Physique Industrielles de Lyon France Contribution de l’UE Aucune donnée Adresse 31 place Bellecour 69298 Lyon Voir sur la carte Coût total Aucune donnée RESON A/S Danemark Contribution de l’UE Aucune donnée Adresse 13,Fabriksvangen 13 3550 SLANGERUP Voir sur la carte Coût total Aucune donnée TECHNICAL UNIVERSITY OF DENMARK Danemark Contribution de l’UE Aucune donnée Adresse Anker Engelundsvej 1, Building 101 2800 LYNGBY Voir sur la carte Coût total Aucune donnée UNIVERSITY OF NEWCASTLE UPON TYNE Royaume-Uni Contribution de l’UE Aucune donnée Adresse NE1 7RU Newcastle upon Tyne Voir sur la carte Coût total Aucune donnée