TAILIEUCHUNG - Air Traffic Control Part 11

Tham khảo tài liệu 'air traffic control part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Development of a Time-Space Diagram to Assist ATC in Monitoring Continuous Descent Approaches 143 a Conflict 3 aircraft 2 flies faster than aircraft 1 and a conflict occurs when both aircraft merge on the remaining track. b Resolution 3 aircraft 1 is directed to the next waypoint and shortens its route to the runway. c Conflict 4 a situation identical to conflict 3. d Resolution 4 aircraft 2 is instructed to enter the holding pattern delaying it by 4 minutes. The delay is indicated by a shift upward of 4 minutes or equivalently a shift to the left by the path length of the holding pattern . Fig. 5. Conflicts resolution through lateral instructions. The first resolution provides a solution without causing a delay and would be preferred. The slanted dashed lines on the resolutions indicate the original trajectories of both aircraft. 144 Air Traffic Control b A new heading is selected a turn is required to return to the route. The distance to the runway reduces less than predicted. c The distance to the runway no longer changes. Fig. 6. The effects of a heading instruction and the timing of the return to the planned route. The older predictions have been indicated by dotted lines to illustrate the motion of the predictions on the screen. d The distance to the runway starts increasing. Development of a Time-Space Diagram to Assist ATC in Monitoring Continuous Descent Approaches 145 Fig. 7. A conflict geometry in which aircraft fly head-on while having sufficient along-track separation. applied between the intersecting segments. However the TSD can not show violation of the vertical trajectory. Both the risks of undetected conflicts within the participating traffic as well as conflicts with other traffic imply that the TSD should not be used without the PVD as currently used by ATC. Even more so the PVD should be used as the first tool to assure separation whereas the TSD should be used to adjust spacing such that the use of the runway can be maximised while still .

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