Four-Dimensional Trajectory-Based Operations is a key component of the Next Generation Air Transportation System to improve efficiency and predictability in the Air Traffic Management system.
Exploring Air Traffic Control Operations and Applications for Required Time of Arrival Use in a Real-Time Simulation Environment
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Four-Dimensional (4D) Trajectory-Based Operations (TBO) is a key component of the Next Generation Air Transportation System (NextGen), integrating an aircraft's navigation capability in space and time to improve efficiency and predictability in the Air Traffic Management (ATM) system. NextGen envisions that ATM will require the widespread implementation of 4D Trajectories (4DT) in all phases of flight, which will precisely describe an aircraft's path and uncertainty in space and time.