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- 저자 : Sakae NAGAOKA (검색결과 2 건)
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An Outlook of Research and Development for the Future Air Traffic Management in Japan
Sakae NAGAOKA 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
Air traffic management (ATM) is defined in an ICAD document as the dynamic, integrated management of air traffic and airspace - safely, economically and efficiently - through the provision of facilities and seamless services in collaboration with all parties. The concept presents the ICAD vision of an integrated, harmonized and globally interoperable ATM system. The planning horizon is up to and beyond 2025. Europe and the United States have developed their own visions/programs for the future ATM systems, i.e., SESAR (Single European Sky A TM Research) and NetGen (Next Generation Air Transportation System), respectively. These programs are based on the concept shown in the ICAD document. In Japan, the Electronic Navigation Research Institute (ENRJ), which is a core research organization of ATM systems, has recently developed its long term research and development (R & D) roadmap. It was developed taking into account those visions and conditions surrounding Japan. Reviewing the visions of ICAD, SESAR and NextGen, ENRI assumed that a key component of the future ATM will be the 4-dimentional trajectory based operation. This paper describes the shift from the current air traffic control (ATC) to the future ATM. Then, the operational concept of the future ATM and R&D towards future ATM systems are explained. Finally ENRI's long term vision and its R&D roadmap are briefly described.
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Osamu Amai,Sakae Nagaoka 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.1 No.-
The Reduced Vertical Separation Minimum (RVSM), which is the reduced minimum from 2,000 ft to 1,000 ft at flight levels (FL) between 290 and FL410 inclusive, was implemented in 30 September 2005 within the Japanese domestic airspace. Prior to the implementation, safety assessment for the airspace in assumed RVSM environments was carried out. Some model parameter values of collision risk model were estimated using flight plan (progress) data and radar data. An estimate of vertical collision risk including operational risk was calculated using these together with given parameter values. The results obtained from this analysis are as follows. (1) Contribution of the vertical collision risk for the crossing routes is about 9 percents of the total technical risk. (2) The estimate of the collision risk is 4.1x10-9 [fatal accidents / flight hour] and the value is smaller than a maximum allowable level of collision risk, i.e. 5x10-9 [fatal accidents / flight hour], called the Target Level of Safety.
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