Radar soundings of the subsurface of Mars.

Authors :: Picardi G
Plaut JJ
Biccari D
Bombaci O
Calabrese D
Cartacci M
Cicchetti A
Clifford SM
Edenhofer P
Farrell WM
Federico C
Frigeri A
Gurnett DA
Hagfors T
Heggy E
Herique A
Huff RL
Ivanov AB
Johnson WT
Jordan RL
Kirchner DL
Kofman W
Leuschen CJ
Nielsen E
Orosei R
Pettinelli E
Phillips RJ
Plettemeier D
Safaeinili A
Seu R
Stofan ER
Vannaroni G
Watters TR
Zampolini E
Source :: Science (New York, N.Y.) [Science] 2005 Dec 23; Vol. 310 (5756), pp. 1925-8. Date of Electronic Publication: 2005 Nov 30.
Publication Year :: 2005
Abstract: The martian subsurface has been probed to kilometer depths by the Mars Advanced Radar for Subsurface and Ionospheric Sounding instrument aboard the Mars Express orbiter. Signals penetrate the polar layered deposits, probably imaging the base of the deposits. Data from the northern lowlands of Chryse Planitia have revealed a shallowly buried quasi-circular structure about 250 kilometers in diameter that is interpreted to be an impact basin. In addition, a planar reflector associated with the basin structure may indicate the presence of a low-loss deposit that is more than 1 kilometer thick.