精密卫星钟差确定系统的实现与精度分析

¹武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079;²武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430079;³武汉大学测绘学院,武汉市珞喻路129号,430079

基金项目: 国家973计划资助项目(2006CB701301)；国家863计划资助项目(2007AA12Z309,2007AA120603,2006AA12A109)

详细信息

Implementation and Precision Analysis of GPS Precise Clock Estimation System

¹Research Center of GNSS,Wuhan University,129 Luoyu Road,Wuhan 430079,China;²State Key Laboratory of Information Engineering in Surveying ,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China;³School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家973计划资助项目(2006CB701301)；国家863计划资助项目(2007AA12Z309,2007AA120603,2006AA12A109)

摘要: 针对区域测控网条件下的单颗导航卫星精密定轨问题,提出了用载波相位观测数据进行精密定轨的具体方案,并提出了一种称为O-C法的载波相位周跳探测与修复方法。将该方法用于某在轨系统卫星的定轨数据预处理,并采用单星定轨软件进行定轨处理,定轨弧长3d,定轨结果平均残差18cm,重叠1d的轨道径向和位置互差分别为0.61m和8.09m;在没有考虑与激光系统时刻偏差的情况下,定轨结果激光数据比对残差平均为0.28m;预报24h轨道,与激光比对的残差平均为1.34m;扣除时刻偏差,预报24h轨道平均精度在0.5m。
- 载波相位 /
- 周跳 /
- 精密定轨 /
- 精度评估
Abstract: Based on the PANDA software,the method of square root information filter (SRIF) is used by processing IGS stations real-time observation data and solving by model of single epoch. Broadcast the GPS clock information to the user. Hence,users can precise positioning in real-time. The results indicate that the differences of real-time precise clock from the IGS final precise clock products are better than 0.2 ns,which is the same accuracy level as those of all IGS analysis centers.
- GPS precise clock /
- SRIF /
- accuracy analysis /
- PANDA