基于多传感器的民航客机定位

为获取民航客机落地前的高精度位置，本文探讨了一种基于多传感器的民航客机高精度定位方法。在飞机飞行过程中，机载数据记录器会记录整个飞行过程中GPS接收机、无线电高度表、惯性导航系统等传感器数据；在飞机落地后，利用无线电高度表数据、GPS数据进行位置差分，再利用惯性导航数据进一步优化，可大幅提高落地前垂直定位精度。结果表明，通过本文方法在机场跑道入口前2 km，飞机定位精度大幅提高，垂直定位精度可以达米级，满足事后调查需求。

Research on positioning of civil aviation aircraft based multi-sensor

In order to obtain the high-precision position of the civil aviation aircraft before landing, this paper discusses a multi-sensor-based high-precision positioning method for the civil aviation aircraft. During the flight of the aircraft, the onboard data logger will record the GPS receiver, radio altimeter, inertial navigation system and other sensor data during the entire flight; after the aircraft lands, use the radio altimeter data and GPS data for position difference, and then Further optimization using inertial navigation data can greatly improve the positioning accuracy before landing. The results show that the positioning accuracy is greatly improved two kilometers before the entrance of the airport runway, and the vertical positioning accuracy can reach the meter level, which can meet the needs of subsequent investigations.