Ancient channel of the Nile, revealed by radar
Copyright: JPL/NASA
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The bottom image, taken with a synthetic aperture radar (SAR) from the Space Shuttle, shows the
ancient channel of the Nile which is hidden under sand in the top image taken with a
conventional camera. The MEEM proposal, discussed at the EGS, would use SAR to reveal structure hidden under Martian sand.
(source: JPL/NASA).
Last Update: 1 September 2019