Parabolic Radar Echoes
In the upper image, simulated radar echoes from the exposed Kepler basin on Mars shows distinctive parabolic-shaped echoes. The lower image is a topographic map of the Kepler basin, used in the simulation. Simulated echoes are from the top (t) and bottom (b) of the rim walls, the basin floor and the peak ring.
The Mars Advanced Radar for Subsurface and Ionospheric Sounding is an instrument on the European Space Agency's Mars Express orbiter. NASA and the Italian Space Agency jointly funded the instrument.
Credit: ASI/NASA/ESA/JPL-Caltech/Univ. of Rome