ConstructingCivilAviationITNetwork一、引言改革开放后特别是经过“七五”和“八五”阶段的大力建设，民航的信息网络系统（话音网和数据网）初具规模，为民航飞行安全和整个航空运输发展做出了巨大贡献。民航系统对各种信息数据（如雷达数据、气象数据、航班信息、货运收发 ConstructingCivilAviationITNetwork I. Introduction After the reform and opening up, especially through the vigorous development of the “Seventh Five-Year Plan” and the “Eighth Five-Year Plan” period, the civil aviation information network system (voice network and data network) has begun to take shape and has served to make the civil aviation flight safety and the entire air transport development Great contribution. Civil aviation system for a variety of information data (such as radar data, weather data, flight information, freight forwarding