Performances of the WISDOM GPR Designed for the Shallow Sounding of Mars
Résumé
WISDOM (Water Ice and Subsur-
face Deposit Observations on Mars) is a Ground Pene-
trating Radar (GPR) that is one of the panoramic in-
struments selected to be part of the Pasteur payload
onboard the Rover of the ExoMars mission. These Pas-
teur Panoramic Instruments (the wide angle camera
PANCAM, the infrared spectrometer MIMA and
WISDOM) will perform large-scale scientific investi-
gations at the sites the Rover will visit. Among these
instruments, WISDOM is the only one that can provide
information about the subsurface structure prior to
drilling.
WISDOM has been designed to characterize
the shallow subsurface structure of Mars. It will give
access to the geological structure, electromagnetic na-
ture, and, possi-bly, to the hydrological state of the
shallow subsurface by retrieving the layering and prop-
erties of the buried reflectors. In addition, the data it
will provide will be used to determine the most promis-
ing locations at which to obtain underground samples
with the drilling system mounted on board the rover.
This paper describes the WISDOM instrument
particular attention is paid on its antennas design as
well as on its operations during the mission. Eventually
the first measurements performed with a WISDOM
prototype on Earth are presented. They show very
promising results to well below 2-meter depth.