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Using GPS rover system

By Woods Hole Coastal and Marine Science Center December 2015 (approx.)
A man stands on a beach holding a tall pole that is taller than him.
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Detailed Description

USGS technician Barry Irwin uses a GPS rover system to locate one of the targets used to calibrate the field of view for the beach cam. Three other larger targets are visible in the background.

Sources/Usage

Public Domain.