PLANNED OBSERVATIONS OF THERMAL PLASMA DRIFTS AND SOLAR-WIND INTERACTIONS IN THE MARTIAN IONOSPHERE

The structure and dynamics of the Martian ionosphere are believed to b e strongly dependent on the nature, magnitude, and topology of its mag netic field, and whether or not Mars has an intrinsic magnetic field. Due to the weak magnetic field on Mars, the Martian ionosphere interac ts directly with the solar wind, resulting in significant outflows of keV ion beams and lower-energy ''pick-up'' ions. We discuss the planne d study of ion drifts and solar wind interactions in the Martian ionos phere using the Planet-B Thermal Plasma Analyzer.