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以NASA新千年计划中的深空计划3为背景,使用星载类GPS的伪距和载波观测数据,研究利用编队卫星间相对测量,高精度自主确定三星编队星座相对状态的有关问题;研究星间相对测量各种可能的测量方案和可能达到的精度,验证这种星间相对测量技术是否能够满足深空计划3的系统要求。首先建立了三星编队星间相对测量系统的数学模型,然后利用星载高精度伪距和载波观测信息,对各种可能的测量方案进行仿真协方差分析;研究利用卫星姿态机动提供的几何信息,进行单差整周模糊度初始化的问题,讨论了卫星姿态机动方案;最后针对每一种测量方案给出了仿真结果和相关的结论。
Based on the deep space program 3 of NASA’s new millennium program, this paper uses the pseudoranges and carrier observations of satellite-based GPS to study the relative problems of using the relative measurements of formation satellites and independently determining the relative states of the Samsung formation constellations with high accuracy. Relative measurement of various possible measurement scenarios and possible accuracy to verify whether such inter-satellite relative measurement technology can meet the system requirements of Deep Space Program 3. Firstly, the mathematical model of the relative measurement system of the Samsung formation is established. Then, the simulation covariance analysis of all possible measurement schemes is carried out based on the high precision satellite carrier and carrier observation information. The geometric information provided by the satellite attitude maneuver is studied, For the initialization of the single-difference integer ambiguity, the satellite attitude maneuver is discussed. Finally, the simulation results and the related conclusions are given for each measurement scheme.