Integrating a fishing grade MBES / Side Scan on an AUV for cheap imaging & SLAM

[projectseabed (Anthony DiMare)]

Chesapeake Bay - Fish Finders for Archaeology

For reference, this is what a downscan from a Lowrance unit looks like. That’s pretty clear to interpret. [shot20-2] I just don’t understand the image that continues after the first return on the Garmin unit. I think the beam is narrower on Lowrance than Garmin and that what we are seeing on the Garmin is a wider beam that just joins like 7.5 degrees to either side into one acoustic image. That’s probably why you see shadows of the logs and tires in the same Downvu image in my previous post. …

This is the only thread I’ve found other people talking about some of the solutions.