Single beam echo sounder and AGDS

The signal reception of a single beam echosounder can be used to infer and classify seafloor habitats.  These work in a variety of ways – and the user is directed to the relevant manufacturers’ manuals – for instance (and in brief) RoxAnn™ and ECHOplus utilise the time lag between the return of the first signal received and a second, weaker signal owing to sea surface reflection, to describe features of the seafloor.  The distribution pattern of points produced when echo 1 (E1) and echo 2 (E2) are plotted against one another, when coupled with detailed ground truthing, can be used to classify the nature of the seafloor.  Other software may only use the first echo, for instance that of Quester Tangents “Impact”.

All material variously copyrighted by MESH project partners 2004-2010

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