The rover system is required for geological surface exploration and for subsurface imaging. With a mass of approximately 6 kg, the rover will operate under its own power and will have a range of roughly 1 km. The rover will be equipped with a visible camera for manoeuvering and surface exploration, as well as a Point Spectrometer and microscope camera for geological survey. Ground-penetrating radar will explore the Martian subsurface (to a depth 20 m) and will look for water; an active vibrator and receiver will use short, sub-millisecond pulses to conduct an acoustic study of the subsurface. For immediate subsurface exploration, the rover will be equipped with a rock grinding and digging tool.