摘要
基于星间距离测量的自主定轨对应于不可观测性问题,如果引入一个基准,虽然可保持卫星之间的相对位置关系,但是容易出现星座旋转误差。星座旋转的根本原因在于星间观测(测距和测速)无法反映轨道升交点赤经的系统误差。本文对卫星自主定轨的旋转误差以及控制方法进行了讨论和分析。
The key to the question about autonomous navigation of GNSS is to found a time- space coordinate system which attached itself to an earth centered earth fixed system. Autonomous orbit determination based on inter-satellite range measurements can maintain the relative position between navigation satellites, but cannot determine the constellation rotation. The cause lies in the fact that inter-satellite range velocity measurements don＇t reflect the right ascension of ascending node systematic error. The reason and solution of constellation rotation error are discussed and the method adaptive to GNSS autonomous orbit determination through a simulation experiment is pointed out.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2009年第11期1280-1284,共5页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2006AA12Z326
2007AA12Z345)
高等学校学科创新引智计划资助项目(B07037)
关键词
自主定轨
时空基准
星座旋转
autonomous navigation
time-space coordinate system
constellation rotation
