Radargram from Mars Express Orbit 1897
The top image is a radargram presenting data collected by the Mars Advanced Radar for Subsurface and Ionospheric Sounding during the 1,897th orbit of the European Space Agency's Mars Express orbiter. It shows parabolic-shaped echoes from the rim walls of a buried impact basin. In the lower image, the surface projection of the parabolic echo indicates a 140-kilometer-diameter (90-mile-diameter) basin buried by young lava flows.
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
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