SHARAD is a subsurface sounding radar embarked on the Mars Reconnaissance Orbiter probe. It complements the MARSIS radar on Mars Express orbiter, providing lower penetration capabilities but much fine
Schematic view of SHARAD operation on Mars Reconnaissance Orbiter
Radargram of north pole layered deposits from SHARAD shallow ground-penetrating radar on Mars Reconnaissance Orbiter
SHARAD finds ice by measuring its radar returns from the surface and from a deeper lower surface. The depth to the lower surface was found from HiRISE images of gaps in the surface.
Utopia Planitia is a large plain within Utopia, the largest recognized impact basin on Mars and in the Solar System with an estimated diameter of 3,300 km. It is the Martian region where the Viking 2
SHARAD
…in middle latitudes support a debris-covered glacier hypothesis. On November 22, 2016, NASA reported finding a large amount of underground ice in the Utopia Planitia region of Mars using SHARAD. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior. The calculations…
Frosted terrain on Utopia Planitia, taken by the Viking 2 lander in 1979
Sojourner on Mars PIA01122