摘要: The effects of ATC strategies on arrival distributions, traffic handling, traffic sequence, and traffic density were analyzed, and compared with an analysis of approach traffic. In both sampling periods, traffic flow planning was ... 展开 The effects of ATC strategies on arrival distributions, traffic handling, traffic sequence, and traffic density were analyzed, and compared with an analysis of approach traffic. In both sampling periods, traffic flow planning was mainly regulative, i.e., required delays were obtained in the en route region, by individual control or by holding. No instances of receptive control are reported. Holding was necessary at peak periods because alternatives, e.g., accelerating individual approaches in order to fill gaps, are too difficult to coordinate. Three techniques of movement guidance in controller's first instruction are noted: course planning fixes the shortest possible flight path, extended if necessary; course planning fixes a mean flight path, not adjusted until within the intermediate approach area; or course planning is initially in the form of delays. In the intermediate approach area, adjustments are made by accelerations. 收起