Objective The final objective of the SAMI project is to set up a wide band bathymetry system based on synthetic aperture sonar techniques already developed and evaluated in the MAST-I project ACID. The use of synthetic aperture techniques for bathymetry can separate between the resolution cell size and the operating frequency range. It can thus be very relevant for high precision long range (low frequency) imaging of the sea bottom. Several techniques that can significantly increase the coverage rate, such as sub- optimal processing (e.g. envelope synthesis), spatial under-sampling, frequency bandwidth splitting (frequency diversity) or/and array splitting (Vernier arrays, sub-arrays) will be investigated either in tank experiments or in sea trials. The scientific and the technical aspects of the SAMI project range from system design to sea experiments and real performance evaluation: - evaluation of the performance of various array processing architecture; - scaled tank experiments of the overall bathymetry system; - mock-up systems using wide-band transducers; - improvement of the stability of the towed fish used in the ACID project; - accurate measurement of fish navigation; - sea experiments on well known areas; - real time processing on board: echo processing image display and storage. The results obtained at sea by means of the mock-up will be used to evaluate the relative merits of array processing and will be compared to the data obtained in both simulation and tank scaled experiments. The expected outcome of this project a high performance tool, validated with both simulated and real data, that could also be used to design any type of imaging system operated under various (smooth or severe) sea conditions. Programme(s) FP3-MAST 2 - Specific research and technological development programme (EEC) in the field of marine science and technology, 1990-1994 Topic(s) 0302 - Underwater acoustics Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Institut de Chimie et de Physique Industrielles de Lyon Address 31 place bellecour 69288 Lyon France See on map EU contribution € 0,00 Participants (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all DANISH MARITIME INSTITUTE Denmark EU contribution € 0,00 Address 99,hjortekaersvej 99 2800 Lyngby See on map Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) France EU contribution € 0,00 Address 83507 La seyne-sur-mer See on map RESON A/S Denmark EU contribution € 0,00 Address 13,fabriksvangen 13 3550 Slangerup See on map UNIVERSITY OF NEWCASTLE UPON TYNE United Kingdom EU contribution € 0,00 Address Kensington terrace 6 NE1 7RU Newcastle upon tyne See on map
