地形辅助导航系统的高空性能分析

Terrain Aided Navigation System's Performance in High Altitude

传统地形辅助导航主要针对飞行器在中低空的导航,在高空的导航性能并无明确结论。文中对基于扩展Kalman滤波的典型地形辅助导航系统进行分析,得出影响系统导航定位性能的主要误差来源,并建立该误差与飞行高度之间的联系。仿真后得到详细的高空导航定位性能指标。

Traditional terrain aided navigation（TAN） system can navigate aircrafts in mid-altitude or low-altitude, There has no conclusion on whether TAN system can still work well to aircrafts in high-altitude. By completely analyzing a TAN system, find out the primary sources of navigation error and how they related to flying altitude. Simulation results show exactly the manner how navigation error is affected by altitude.