卫星自主导航技术具有重要的**价值。提出了一种基于焦平面的红外静态地球敏感器和可见光星敏感器的天文自主导航系统。详细论述了天文导航的原理，推导了地心矢量和地心距的解算公式，分析了影响地心矢量和地心距解算精度的因素，并给出了数值仿真的结果。结果表明该系统具有体积小、重量轻、功耗小、成本低和无转动部件等优点，适用于各种轨道航天器的姿态确定与轨道确定。

Satellite autonomous navigation technology has a value of important military application. A celestial autonomous navigation system is proposed based on IR focal plane horizon sensor and star sensor. The principles of celestial navigation in detail are discussed. The formula about geocentric vector and geocentric distance is derired. The impact of the reasons for the accuracy of geocentric vector and geocentric distance is analyzed, and the simulation results is given in the final. The system has the advantages of small size, light weight, low power consumption, low cost and no rotating parts. It can be applicable to a variety of orbiting spacecraft attitude determination and orbit determination.