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为了保证航空运输安全、有序、快速地发展,有效地改进空中交通管理工作,国际民航组织(ICAO)在1988年提出了一个主要基于卫星的通信(C)、导航(N)和监视(S)的方案,其中包括空中交通管理系统(ATM)的改进设想,简称为CNS/ATM系统,即未来空中航行系统(FANS),并制定了一个全球协调计划,预计到21世纪初期,将基本完成向未来空中航行系统的过渡。届时,现行航行系统的甚高频话音及高频话音通信将被卫星数据链、二次监视雷达(SSR)S模式数据链及甚高频数据链所取代;飞行中的飞机通过卫星及其它数据通信链路,自动发送其位置及其它数据到空中交通管制中心。这样,不仅大大改善了通信联络,而且更有利于保障飞行安全。但
In order to ensure the safe, orderly and rapid development of air transport and effectively improve air traffic management, ICAO proposed in 1988 a major satellite-based communications (C), navigation (N) and surveillance ), Including the improved concept of ATM, referred to as the CNS / ATM system, the Future Air Navigation System (FANS) for short, and the development of a global coordinated plan that is expected to be substantially completed by the early 2000s The transition to a future air navigation system. At that time, VHF voice and HF voice communications of the current navigation system will be replaced by satellite data links, secondary surveillance radar (SSR) S-mode data links and VHF data links; aircraft in flight via satellites and other data Communications link that automatically sends its location and other data to the air traffic control center. This not only greatly improves communication but also helps to ensure flight safety. but