星间自主相对测距中载波相位整周模糊解算方法研究

Research on Integer Ambiguity of Carrier Phase Measurements in Satellite-to-satellite Relative Autonomous Ranging

载波相位整周模糊度解算是利用载波相位进行星间无线电相对距离测量的关键。介绍编队小卫星的工作特点,针对星间相对距离实时、高精度测量的要求,详细阐述利用双频伪码和载波相位观测值解算载波整周模糊度的方法,推导伪码、载波相位测量误差与模糊度解算误差的关系,讨论降低误差的方法。计算机仿真结果表明,该方法可以在单个测量历元获得载波相位整周模糊解算,解算精度与伪码测距精度成正比关系。

In order to realize real-time and high accurate satellite-to-satellite relative autonomous ranging,some key problem such as integer ambiguity of carrier phase measurements must be fixed.This paper introduces the characteristics of formation flying small satellites,and then discusses in detail the ambiguity resolution using the combination of dual-frequency code and phase measurements.The method for reducing the error of integer ambiguity is discussed.The result of computer simulation proves that this ambiguity resolution method using in satellite-to-satellite relative autonomous ranging is feasible and reliable,and the error of code is the main obstacle.