2019_programme: INERTIAL MULTIBEAM SIDESCAN SONAR AND MULTIBEAM-MULTISWATH ECHOSOUNDER AS ADAPTIVE BACKSCATTER IMAGING SYSTEMS



  • Session: 25. Signal and image processing
    Organiser(s): N/A
  • Lecture: INERTIAL MULTIBEAM SIDESCAN SONAR AND MULTIBEAM-MULTISWATH ECHOSOUNDER AS ADAPTIVE BACKSCATTER IMAGING SYSTEMS
    Paper ID: 858
    Author(s): Charlot Didier, Mosca Frederic
    Presenter: Charlot Didier
    Presentation type: oral
    Abstract: Backscatter imaging systems are, usually, optimized for pre-defined tasks: high resolution sidescan are devoted to detection purpose, lower resolution systems for large area mapping and seabed classification applications, and multibeam echo sounders are dedicated for bathymetric survey. Adaptive imaging systems are, on the other hand, designed to be able to modify their insonification geometries and processing algorithms to optimize and adapt the performances of the imaging systems according to the environment conditions and operational needs. \nWe will illustrate the benefits of this approach for backscatter imaging considering two adaptive systems examples: “inertial multibeam sonar system” and “multibeam multiswath echosounder”. An inertial multibeam sonar system is a sidescan sonar composed of four keys elements: a large emission aperture, a multiple receiver antenna integrated with an inertial navigation units, and an adaptive processing algorithm [1]. The processing parameters can be tuned so as to produce the best image resolution and quality from incoherent to full coherent synthetic aperture processing [2]. The second adaptive backscatter imaging system we will focus on, is a multibeam multiswath echosounder [3]. It is composed of a two linear antenna array arranged in a conventional Mills Cross geometry where each antenna can transmit or receive and the emission beam can be steered electronically. Benefits of multiswath backscatter imaging will be evaluated, and especially on seabed classification and hydrography. \n\n [1]F. Jean, Shadows, synthetic aperture sonar and forward looking gap-filler: different imaging algorithms, OCEANS 2008 - MTS/IEEE Kobe Techno-Ocean , April 2008. \n[2]P. Alais, P. Cervenka, P. Challande, V. Lesec, Non coherent synthetic aperture imaging, Acoustical Imaging 24, 1-8, Plenum Press, 1998.\n [4] F. Mosca, G. Matte, O. Lerda, F. Naud, D. Charlot, M. Rioblanc, and C. Corbieres, “Scientific potential of a new 3d multibeam echosounder in fisheries and ecosystem research,” Fisheries Research, Volume 178, June 2016, Pages 130-141
  • Corresponding author: Dr Charlot Didier
    Affiliation: Senior Engineer
    Country: France
    e-mail: