Geoscience Reference
In-Depth Information
Investigation of Sonar Stabilisation
Method for Improved Seafloor Image
Quality
Ar
nas Andziulis, Tomas Lenkauskas, Tomas Eglynas,
Miroslav Voz
ū
k and Sergej Jakovlev
ňá
Abstract Constant monitoring of sea
floor in harbours is an essential part of
economy development of every sea country. Exact estimation of the sea
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floor relief
parameters is very important not only for port development but also for scientists.
Sonar image corrections are constantly made with a high margin of error, using
GIS. New correction methods are developed. They include: mechanical correction
of the cables of the side-scan sonar, programmable correction of the ship navigation
and steering system, other software tolls with developed correction and control
algorithms. Most commonly sea
fl
fl
floor images are made using side scan sonar. It is
used for rapid sea
fl
oor imaging. The quality of the captured images is strongly
in
uenced by the sonar towing consistency. Even small sonar disturbances caused
by the vessels
fl
'
towing motion can affect the quality of the images. Therefore, to
reduce the in
uence of the ship motion new methods are being developed. In some
cases heave motion compensation can prove to be effective. In this paper an effi-
fl
-
cient heave motion detecting system was proposed and brie
y analysed. Sonar and
the ship motion were taken into account during the development and testing of the
heave motion compensation system prototype.
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Keywords Side scan sonar
Heave motion compensation
Ship movement
GIS
