摘要
模糊度固定是提升精密单点定位精度和快速收敛的主要因素之一,相位偏差、硬件延迟与模糊度参数无法正确分离是导致模糊度非整数特性的主要原因。采用德国地学研究中心(GFZ)公开发布的包含相位偏差的整数钟产品GBM,并基于全球分布的5个MGEX连续跟踪站年积日290~296的观测数据,对比分析单伽利略卫星导航系统(Galileo)精密单点定位(Precise Point Positioning,PPP)在固定解模式和浮点解模式下的定位精度和模糊度固定率。实验结果表明,模糊度固定模式下的定位精度,5个测站E方向提升都在83%以上,N方向提升在55%以上,U方向除了MATG测站,其他在65%以上,模糊度固定率方面,除了MATG站以外都优于60%。
Ambiguity-resolution is one of the important factors for realizing the high precision and fast convergence of Precise Point Positioning(PPP).Uncalibrated phase delay,hardware delay and that ambiguity parameters cannot be properly separated are the major reasons affecting the integer of ambiguity.Utilizing the public precision products GBM from GFZ,and based on the data from DOY 290~296 of 2021 of five MGEX continuous tracking stations,the PPP result and ambiguity-resolution fixed ratio in fix and float modes by Galileo are analyzed.The test results show that in ambiguity-resolution fixed mode,the positioning accuracy increases by more than 83%in E directions of all the five stations,55%in N directions,and more than 65%in U directions of all stations except the MATG station,respectively.The fixed ratio is better than 60%in all stations except the MATG station.
作者
张京奎
武子谦
陈永昌
惠沈盈
易卿武
ZHANG Jingkui;WU Ziqian;CHEN Yongchang;HUI Shenying;YI Qingwu(State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)
出处
《无线电工程》
北大核心
2023年第9期2203-2210,共8页
Radio Engineering
基金
中国电子科技集团公司第五十四研究所发展基金(SCX20684x012)。
关键词
模糊度固定
精密单点定位
定位精度
模糊度固定率
相位偏差
ambiguity-resolution
PPP
positioning accuracy
fixed ratio of ambiguity-resolution
uncalibrated phase delay
