综合星间和地面测距数据的导航卫星联合定轨

Combined Orbit Determination of Navigation Satellites with Cross-link Ranging Observations and Ground Tracking Observations

摘要: 简要地论述了基于星间测距数据和地面跟踪数据的导航卫星联合定轨中的观测模型、定轨软件及数据模拟方法等,在此基础上,基于自编的联合定轨软件进行了不同方案的模拟计算。结果表明,采用星地联合定轨模式,不仅可以获得很好的定轨精度,而且可大量减少地面跟踪站的布设数目以及降低对地面站的几何分布要求;地面跟踪站数量的增加及其地理分布的改善对提高联合定轨精度作用有限。

Abstract: This paper discusses the mathematical models,simulation methods of observations,and methods of COD(combined orbit determination) of navigation satellites,which is based on cross-link ranging observations and ground tracking observations.A variety of simulations were processed with the software developed by ourselves in this paper,and the results indicate that the effect of adding ground stations and improving their geographical distribution on improving the accuracy of combined orbit determination is very limited.