| Sonar systems own the attractive ability to simultaneously provide a bathymetric map and a sonar image of large insonified seabed areas. Recorded data information, the backscattered energy is well known as an essential clue about the seabed nature and roughness. This PhD thesis lie within a seafloor characterization project using acoustical methods. The objectives are the data exploitation of two sonar systems (a multibeam echosounder and sidescan sonar) ; both operate at a high frequency (around 100 kHz) but their survey geometry is different. Sonar images are first analyzed and reveal artefacts due to geometry of the sonar system and array patterns, leading to difficulties in their geological interpretation. In the context of the sediment discrimination,... |
