Conflict detection and resolution Air navigation 1 Air traffic control 1 Aircraft 1 Aircraft trajectory 1 Computational feasibility 1 Fast-time simulation 1 Fits and tolerances 1 Operational feasibility 1 Reference trajectories 1 Specifications 1 Specified trajectories 1 Trajectories 1 Trajectory specification 1 U-Space 1 UAS Traffic Management (UTM) 1 Unmanned Aircraft System (UAS) 1 Urban Air Mobility (UAM) 1