摘要
基于目前Galileo卫星发射的多频导航信号,采用MGEX 2037周的数据从定位精度和收敛时间方面系统比较分析了Galileo双频无电离层组合、双频非差非组合和三频非差非组合PPP的定位性能。实验结果表明,对大多数测站,三频PPP静态单日解定位偏差水平方向优于1 cm,高程方向优于2 cm;动态定位偏差水平方向优于5 cm,高程方向上优于10 cm。相比于双频非组合PPP模型和双频消电离层PPP模型,三频非组合模型静态单日解定位偏差分别提高17.8%和19.6%;动态单日定位偏差提高了9.6%和34.0%,但收敛时间提高幅度不明显。
Based on the current multi-frequency navigation signals launched by Galileo satellites,the positioning performance of Galileo dual-frequency ionosphere-free combined,dual-frequency uncombined and triple-frequency uncombined PPP is systematically compared and analyzed by using the data of MGEX 2037 weeks in terms of positioning accuracy and convergence time.The experiment results show that the positioning deviation of Galileo triple-frequency static uncombined PPP is better than 1 cm in horizontal direction and 2 cm in vertical direction,respectively,kinematic horizontal position deviation is better than 5 cm,vertical direction is better than 10 cm.Compared with Galileo dual-frequency uncombined PPP and dual-frequency ionospheric-free combined PPP,the positioning deviation of triple-frequency static PPP is increased by 17.8%and 19.6%respectively,kinematic positioning is increased by 9.6%and 34.0%,but the convergence time is not greatly improved.
作者
林家乐
乔书波
李林阳
LIN Jiale;QIAO Shubo;LI Linyang(Information Engineering University,Zhengzhou 450001,China)
出处
《测绘科学技术学报》
北大核心
2019年第6期576-581,共6页
Journal of Geomatics Science and Technology
