日本の空域内の航空路における近接通過頻度

抄録

The feasibility of reducing the vertical separation minimum above flight level 290 from 2,000ft to 1,000ft on the basis of a collision risk model has been studied at the RGCS Panel of the ICAO. This paper describes the results of the calculation on the passing frequency, which is one of the key parameters of the collision risk model, for air routes in the Japanese airspace. We calculated the passing frequencies using flight plan data and estimated a Japanese representative value. The results show that 1) Al route contains many route segments of high passing frequencies. 2) and a representative value of opposite direction passing frequency for the Japanese airspace is 0.84 and that of same direction passing frequency is 0.014 [aircraft passings/flight hour].