SLIM will begin its final descent from an altitude of 15 km, during Perilune of its final 600x15 km elliptical orbit.
Besides traditional inputs to its navigation and control system, SLIM will utilize radar and vision based systems to precisely estimate position and velocity and to avoid obstacles during landing.
Interestingly, SLIM will land, tilt over and rest on its side, using shock absorbing legs, on the sloping landing surface.