摘要
因GNSS系统间观测噪声、轨道精度的差异,采用经验权比进行组合定位难以得到最优结果。基于此,在GPS/GLONASS/BDS组合定位中引入Helmert方差分量估计,对GPS/GLONASS/BDS组合单点定位和基线解算中各系统观测值进行合理定权。实验表明,采用该方法确定的伪距观测值最佳权比为5∶1∶1,相位观测值最佳权比为1∶1∶1,有效提高了GPS/GLONASS/BDS组合定位的精度和可靠性。
It is difficult to get the optimal result using empirical weight ratio in combination positio- ning, due to differences in observation noise and orbit accuracy between GNSS systems. Based on this, Helmert variance component estimation is introduced into GPS/GLONASS/BDS combined posi- tioning, determining the reasonable weight ratio of the GPS/GLONASS/BDS combined single point positioning and baseline solution. Based on a set of experimental data, the experimental results show that the method can reasonably determine the weight ratio of the observations of the GPS/GLONASS/ BDS combined positioning. The optimal weight ratio of pseudo-range observations is 5： 1 ： 1, the opti- mal weight ratio of phase observations is 1 ： 1 ： 1, which improves the accuracy and reliability of the GPS/GLONASS/BDS combined positioning.
作者
刘金海
涂锐
张睿
张鹏飞
卢晓春
LiUjinhai;TURui;ZHANGRui;ZHANGPengfei;LUXiaochun(National Time Service Center, CAS, 3 Shuyuan Road, Xi＇an 710600, China;Key Laboratory of Preeision Navigation, Positioning and Timing Technology, CAS, 3 Shuyuan Road, Xi＇an 710600, Chin;University of Chinese Academy of Sciences, A19 Yuquan Road, Beijing 100049, China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2018年第6期568-570,576,共4页
Journal of Geodesy and Geodynamics
基金
国家重点研发计划(2016YFB0501804)
国家自然科学基金(41504006
41674034)
中国科学院百人计划(Y620YC1701)
前沿科技重点研发计划(QYZDB-SSW-DQC028)~~
