Some information about 4D trajectories. The future air traffic control system should be based on planning, allocation, dispatching, and control based on four-dimensional space and time.
Four-dimensional trajectory:
https://www.zhihu.com/question/317642196/answer/634926383
Che Jinjun: Promote the construction of the "Top Four Air Traffic Control" to help high-quality development of civil aviation - future development and thinking of the air traffic control system based on track operation
NextGen:
https://www.faa.gov/nextgen/
Machine-translated from the Chinese original 四维航迹和美国NextGen (published 2020-10-26). WeChat original ↗