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The GNSS tide gauge at Onsala Space Observatory 2

Image   •   May 21, 2014 08:00 BST

When satellites pass over the sky, the GNSS tide gauge uses signals direct from the satellite and signals reflected off the sea surface to measure the sea level.
License Creative Commons Attribution
Photographer / Source Johan Löfgren
Size 2.53 MB
Format .jpg
Image dimensions 2302 x 3198 pixels