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电子工程2021年1期

一种低轨卫星星座增强北斗精密单点定位的算法
丁欢,潘庆芳,安秦
(山西能源学院,山西 晋中 030600)

摘  要:选取BDS 与120 颗LEO 卫星系统,采用STK 仿真卫星星座及观测数据,利用仿真数据对比BDS 单系统与BDS+LEO 系统的精密单点定位差异。以BJFS 站为例,分析LEO 星座对BDS 精密单点定位的增强作用。结果表明:与BDS 单系统相比,BDS+LEO 系统可见卫星数均值从17.1 提升至27.2,GDOP 值均值从1.32 下降至0.92;LEO 增强BDS 后,观测值的关联性大大降低,收敛速度提升一个数量级,LEO 卫星轨道误差0.10 m/0.15 m/0.20 m 相对的BDS+LEO 精密单点定位平均收敛时间分别为3.6 min/3.9 min/4.5 min。


关键词:低轨卫星;北斗与LEO 联合;精密单点定位



中图分类号:TP301.6;P228.1   文献标识码:A   文章编号:2096-4706(2021)01-0052-03


An Algorithm for Enhancing BDS Precise Point Positioning by LEO Satellite Constellation

DING Huan,PAN Qingfang,AN Qin

(Shanxi Institute of Energy,Jinzhong 030600,China)

Abstract:This paper selects BDS and LEO satellite system including 120 satellites,uses STK to simulate satellite constellation and observation data,compares the difference of the precise point positioning between BDS single system and BDS+LEO system by using simulation data. Taking BJFS station as an example,enhancement effect of LEO constellation on BDS precise point positioning is analyzed. The results show that compared with BDS single system,the average number of visible satellites of BDS+LEO system increases from 17.1 to 27.2,and the GDOP average value decreases from 1.32 to 0.92;after enhancing BDS by LEO,the relevance of observed values is greatly reduced,the convergence speed is increased by an order of magnitude,and the corresponding average convergence time of BDS + LEO that the orbit error of LEO satellite 0.10 m/0.15 m/0.20 m are respectively 3.6 min/3.9 min/4.5 min.

Keywords:LEO satellite;BDS and LEO combination;precise point positioning


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作者简介:

丁欢(1992.08—),男,汉族,北京人,助教,硕士研究生,研究方向:卫星导航与定位技术;

潘庆芳(1989.10—),女,汉族,山东菏泽人,助教,硕士研究生,研究方向:摄影测量与遥感;

安秦(1991.01—),女,汉族,山西忻州人,助教,硕士研究生,研究方向:地理信息系统遥感应用。