空港における航空機の地上運航状況分析

<p>Reduction of separation for arrival or departure aircraft is effective for increasing an airport traffic capacity. This paper describes the investigation on a possibility of separation reduction, under the current Air Traffic Control in an airport. For this purpose, field observation was made at New Tokyo International Airport for 5 days.</p><p>The results of the investigation are listed below:</p><p>1. At the runway exit for a southern wind, almost half of arrival aircraft decreased its speed below the average speed on the taxiway. This was due to the curved structure of the high speed taxiway.</p><p>2. On the runway for a southern wind, it takes 85 seconds on average for the arrival aircraft on the final to fly 3 nm the runway threshold. On the other hand, the average runway occupancy time is 80 seconds. So disregarding about wake turbulence, it is considered that 3 nm can be a minimum separation in the present airport environment.</p><p>3. Using the frequency distribution of landing interval, the capacity of the runway for a southern wind calculated. The capacity calculated is 17 arrivals per hour. The number in field observation is 16 per hour.</p><p>4. The model fitting using a general Erlang distribution function was made for landing intervals. The data generally agreed with the distribution function.</p><p>5. In the present airport environment, it seems no problem to reduce current 2 minutes' interval for departure aircraft to 80 seconds, if the present wake turbulence application can be changed by considering the wind vicinity of a runway.</p><p>6. Use of Anticipating separation is recommended to increase the runway capacity.</p>