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编队飞行的卫星或卫星星座对轨道确定自主性和精度提出了较高要求。针对这个问题,通过建立星座的轨道动力学模型和星间观测的测量模型,将星座中的星间观测数据和地面观测数据融合起来,将待估的卫星轨道参数和部分动力学参数进行适当的分类,研究卫星星座整网轨道确定的新方法,并在理论上分析了整网定轨方法能提高定轨精度的原因;最后采用自主开发的卫星星座整网轨道确定软件进行了仿真计算。计算表明,该方法能有效地减少对地面站的依赖,并较大幅度提高定轨时卫星绝对位置和相对位置精度。
The orbiting satellites or satellite constellations place high demands on the orbit determination autonomy and accuracy. In response to this problem, by establishing the orbit dynamics model of the constellation and the measurement model of the inter-observational observation, the inter-satellite observational data and the terrestrial observational data in the constellation are fused, and the orbital parameters and partial kinetic parameters to be estimated are properly Classification and study of satellite constellation orbit determination of new methods, and theoretically analyzed the whole network orbit determination method can improve the orbit determination accuracy; Finally, the use of self-developed satellite constellation orbit determination software for simulation. The calculation shows that this method can effectively reduce the dependence on the ground station and greatly improve the accuracy of the absolute position and the relative position of the orbit determination satellite.