一种GPS载波相位差分相对定位算法

An Differential Carrier Phase Algorithm of GPS Static Relative Positioning

导航定位技术是空间卫星交会对接任务的关键技术;导航定位精度要求达到厘米级,工程实现难度大;为了解决该问题,文章基于卫星交会对接任务需求,提出采用GPS载波相位差分相对定位算法对卫星进行高精度导航定位;该算法利用测量之间的强相关性,通过误差消除获得高测量精度;同时,应用该算法结合星载GPS天线进行了外场试验验证;试验结果表明,GPS载波相位差分相对定位算法精度达到厘米级,可以满足卫星交会对接任务的导航定位测量要求。

Navigation and positioning is a critic technique of satellite rendezvous and docking mission.To meet the requirements of the mission,the positioning precision must up to the centimeter level,which is difficult in engineering.According to satellite rendezvous and docking mission requirement,the paper adopts an differential carrier phase algorithm of GPS static relative positioning to solve the problem.The algorithm utilizes the relation of positioning measurement to obtain high precision through eliminating the error.The paper designs an outfield experiment combined with satellite-borne GPS antenna.Numerical test results show that precision of the algorithm can be up to the centimeter level and the algorithm can be applied to the satellite rendezvous and docking mission.