According to the features of cross orbit vehicle and the demands of light miniaturization, a navigation approach of conical scan is proposed, which uses refraction measurements of starlight passing through the upper atmosphere. Then, the model of the system is built and linearized. The algorism is based on EKF, and is proved by simulation at last. The approach provides a new idea to the design of small light autonomous navigation system.%针对跨轨道飞行器飞行特点和轻小型化设计要求,提出了一种基于单个星敏感器的星光折射圆锥扫描观测导航方法,建立了导航系统数学模型,采用扩展卡尔曼滤波(EKF)作为信息融合方法,最后通过仿真计算验证了方法的可行性.该方法为轻小型化自主导航系统设计提供了新的思路.
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