Program Book - Oceans'10 IEEE Sydney

T06: Synthetic aperture sonar
Dr Roy E Hansen
Time: 1300 – 1630
Room: Bayside 103
This tutorial will describe the principles,
benefits and challenges of synthetic
aperture sonar (SAS) imaging of the
seafloor. The tutorial starts with the
basic principles of SAS including
derivation of resolution and area
coverage. The similarities and
differences between SAS, synthetic radar aperture radar (SAR)
and seismic exploration will be shown. Next, the frequency
dependence in SAS will be discussed. The tutorial continues to
describe the challenges in SAS. These are: How to navigate
with sufficient accuracy to obtain well focussed images in SAS;
The effect of varying ocean environment on SAS; The effect of
platform behaviour on SAS. SAS in rough terrain or SAS on
non-straight paths; SAS in shallow waters or in areas of
multipath; The tutorial will describe critical design for robust
SAS, and how to do robust SAS processing. Finally, the tutorial
will describe the properties of SAS images, and shows
techniques to enhance or suppress specific properties. This
includes shadow enhancement, echo enhancement and multiaspect
imagery.
Biography: Roy Edgar Hansen received the M.Sc. degree in
physics in 1992, and the Ph.D. in physics in 1999, both from
the University of Tromso, Norway. The Ph.D. thesis title is
Measurements in the Mixed Layer by a Bistatic multi-CW
Doppler Sonar. From 1992 to 2000 he was with the Norwegian
research company TRIAD, working on multistatic sonar,
multistatic radar, SAR and underwater communications. Since
2000, he has been working at the Norwegian Defence Research
Establishment (FFI), Kjeller, Norway. He is currently principal
scientist and project manager for the HUGIN autonomous
underwater vehicle development and the synthetic aperture
sonar development at FFI. He is also adjunct associated
professor at Centre for Imaging at University in Oslo, Norway.
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