Posted by tourdemars to Mars Express at September 27, 2009 10:52 PM

Unusual signals detected by the Mars Express MARSIS instrument have been used to determine the magnetic field strength of Mars. In a forthcoming issue of Icarus, Ferzan Akalin and colleagues demonstrate how the MARSIS instrument can be used as a magnetometer - an unexpected application with important consequences for studies of local plasma effects and the Mars Express spacecraft environment.