基于折射方向矢量的地球卫星星光折射导航新方法

在星光折射导航中，星光折射视线包含星光折射的大小和星光折射方向两种折射信息，传统的星光折射导航量测量只利用了星光折射大小的信息。但实际上，星光折射方向也是卫星位置矢量的函数，含有卫星位置的重要信息。针对上述问题，提出了一种同时使用两种折射信息的星光折射导航新方法，该方法以星光折射方向矢量为量测量。详细介绍了基于折射方向矢量地球卫星星光折射导航方法的量测量的获取和量测模型的建立，同时对不同影响因素对导航系统性能的影响进行分析。仿真结果表明，该方法的导航精度优于折射视高度和星光折射角两种传统的星光折射导航量测量。

New Method of Earth Satellite Stellar Refraction Navigation Based on Stellar Refraction Direction Vector

The refraction apparent rays of stellar refraction navigation contain two kinds of information of refraction, stellar refraction angle and stellar refraction direction. Traditional measurements of stellar refraction navigation only use the information of the magnitude of the stellar refraction, and not use the important information of the stellar refraction direction. In fact, the direction of stellar refraction is also a function of the satellite position vector and contains important position information of the satellite. Aiming at the problem, this paper proposes a new method of stellar refraction navigation using two kinds of refraction information. The stellar refraction direction vector is used as a measurement in this method and the measurement model is established. The simulation results show that the navigation accuracy of this new method is better than that of the refraction apparent height and the stellar refraction angle, which are two traditional measurements of stellar refraction navigation.