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GeoSwath Plus multibeam echosounder offers new filtering

Harbour wall
Harbour wall. The vertical structures are preserved by the feature filter in GS4 software.
9. November 2015

GS4, the new software supplied with the GeoSwath Plus shallow water multibeam echosounder features a state-of-the art user interface, increased speed and many new functionalities, including a feature filter.

An intrinsic part in processing phase measuring bathymetry data is filtering the seafloor return from the raw data, which also includes background noise of electronic and acoustic origin, water column returns and sea surface backscatter. Previous filters were developed assuming a relatively smooth seafloor. It has been a labour intensive task adopting the filter parameters to maintain vertical structures and large objects. The feature filter automates this task with a large gain in processing speed, even in terrain that was considered difficult to process previously, such as harbour environments, engineering structures, shipwrecks and debris.

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