HYDROACOUSTICS
ANNUAL JOURNAL
START NEW VOL 20 SEARCH STATISTICS PAS - GDANSK DIVISION

Motion compensation problem in stripmap SAS systems

pp. 45-54, vol. 10, 2007

Marcin Szczegielniak
University of Technology and Life Sciences, Bydgoszcz, Poland

Key words:

Abstract: Synthetic Aperture Sonar (SAS) is the high-resolution acoustic imaging technique which allows to improve the along-track resolution. A performance of SAS systems strongly depends on phase errors induced by sonar path deviations. An ideal straight path is assumed during the data gathering in such systems. The loss of coherence in the order of fraction of wavelength can result in blurring and smearing, a serious degradation of the sea-floor image. An elimination of motion errors is indispensable in order to make SAS systems applicable to high resolution imaging. Differences in motion errors modeling between systems operating in stripmap and spotlight modes are discussed. A few possible ways of the motion compensation are categorized and presented here. The results of the numerical simulation are shown and discussed in this paper.

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© Polish Acoustical Society - Gdansk Department, Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported. (CC BY-NC-SA 3.0)