蔡华, 赵齐乐, 楼益栋. 精密卫星钟差确定系统的实现与精度分析[J]. 武汉大学学报 ( 信息科学版), 2009, 34(11): 1293-1296.
引用本文: 蔡华, 赵齐乐, 楼益栋. 精密卫星钟差确定系统的实现与精度分析[J]. 武汉大学学报 ( 信息科学版), 2009, 34(11): 1293-1296.
CAI Hua, ZHAO Qile, LOU Yidong. Implementation and Precision Analysis of GPS Precise Clock Estimation System[J]. Geomatics and Information Science of Wuhan University, 2009, 34(11): 1293-1296.
Citation: CAI Hua, ZHAO Qile, LOU Yidong. Implementation and Precision Analysis of GPS Precise Clock Estimation System[J]. Geomatics and Information Science of Wuhan University, 2009, 34(11): 1293-1296.

精密卫星钟差确定系统的实现与精度分析

Implementation and Precision Analysis of GPS Precise Clock Estimation System

  • 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。

     

    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.

     

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