This is a review paper that surveys past work in, and the recent status of, active synthetic
aperture sonar (SAS). It covers the early historical development of SAS with its provenance …

This thesis contains a description of SAS processing algorithms, offering improvements in
Fourier-based reconstruction, motion-compensation, and autofocus. Fourier-based image …

Nowadays, there are two leading sea sounding technologies: the multibeam echo sounder
and the multiphase echo sounder (also known as phase-difference side scan sonar or …

The design of a shallow-water synthetic aperture sonar (SAS) requires an understanding of
key system and environmental issues. The main factors that limit SAS performance are as …

This paper presents signal processing techniques particularly suited for interferometric
Synthetic Aperture Sonar (SAS) systems onboard Autonomous Underwater Vehicles …

The topic of this thesis is relative depth estimation using interferometric sidelooking sonar.
We give a thorough description of the geometry of interferometric sonar and of time delay …

The effect that uncompensated motion errors have on synthetic aperture sonar (SAS)
imagery can be severe. Time-domain beamforming SAS reconstruction is able to …

Navigation is defined as the process of estimating the six degrees of freedom. We have seen
an increased demand for navigation the last decade, and important reasons for the growth …

The Norwegian Defence Research Establishment (FFI) and Kongsberg Maritime AS have an
ongoing program to develop synthetic aperture sonar (SAS) technology for the HUGIN …

The relative height of the seafloor can be estimated by using two vertically displaced
receivers. In this paper, we propose techniques to improve the accuracy of the estimated …