北斗卫星导航单点定位方法研究  

Research on Single-Point Positioning Method for BeiDou Satellite Navigation

作　　者：王勇 郑越峰 杨頔 周萌 王炳辉 WANG Yong;ZHENG Yuefeng;YANG Di;ZHOU Meng;WANG Binghui(State Grid Location Based Service Co.,Ltd.,Beijing 102209,China)

机构地区：[1]国网思极位置服务有限公司,北京102209

出　　处：《自动化仪表》2025年第1期16-20,共5页Process Automation Instrumentation

摘　　要：目前,北斗卫星导航系统(BDS)在单点定位模式下,如忽视差分码偏差和误差修正方式不当,会导致定位性能下降。为了改善BDS的单点定位性能,创新性地定义与估计差分码偏差,检验差分码偏差估计值精度,深入分析精密单点定位误差,从而筛选接收机钟差与卫星钟差。应用非组合方式获取修正值,计算电离层延迟与对流层延迟以消除对冲值。基于差分码偏差估计值、误差修正值和大气参数消除对冲值,获取接收机伪距最终观测值。通过解算观测值获得接收机的位置信息(经纬度),实现北斗卫星导航单点定位。试验结果表明,在不同试验工况背景下,所获得的定位结果与接收机实际位置保持一致,并且定位收敛时间最小值为3 s。该方法应用性能较佳。Currently,BeiDou satellite navigation system(BDS)in single-point positioning mode can lead to degradation of positioning performance if differential code bias is neglected and error correction is done in an improper way.In order to improve the single-point positioning performance of BDS,the differential code deviation is innovatively defined and estimated,the accuracy of the differential code deviation estimation value is examined,and the precision single-point positioning error is analyzed in depth,so as to screen the receiver clock difference and satellite clock difference.The corrections are obtained in a non-combined way,and the ionospheric delay and tropospheric delay are calculated to eliminate the hedging value.Hedge values are eliminated based on differential code bias estimates value,error corrections value,and atmospheric parameters to obtain final receiver pseudo range observations value.The position information(latitude and longitude)of the receiver is obtained by solving the observed value to realize the single-point positioning of BeiDou satellite navigation.The experimental results show that under the background of different test conditions,the obtained positioning results are consistent with the actual position of the receiver,and the minimum value of the positioning convergence time is 3 s.The method has better application performance.

关 键 词：北斗卫星导航系统 差分码偏差 对流层延迟 电离层延迟 精密单点定位 非组合 

分 类 号：TH39[机械工程—机械制造及自动化]