OrbitGuard is an autonomous navigation system capable of both far and near range navigation for satellite Rendezvous. It can handle SSA and Inspection Missions.OrbitGuard is capable of detecting a target at a distanceof several hundred kilometres. It can perform pose estimation of an object, with robustness, against extreme lighting conditions, regardless of its background and with a centimetre-level accuracy at a 10m distance. Its capability of providing a high accuracy pose solution is estimated at a 95% or higher rate.