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北斗系统GEO卫星伪距多路径误差改正

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北斗系统地球静止轨道(GEO)卫星因相对于地面近似静止,其多路径误差相对于其他类型较为严重,且表现出系统波动现象.为提升定位精度,本文在GEO卫星伪距多路径误差特征研究的基础上,采用奇异谱分析方法对其进行修正,并通过伪距单点定位(SPP)验证伪距多路径误差修正效果.选取测站CUT0连续10 d的静态观测数据进行修正试验.研究发现,GEO卫星伪距多路径误差序列表现出较强的天重复性,且多路径误差中的系统误差项越大,重复性也越强;在运用奇异谱分析方法修正GEO卫星伪距多路径误差各系统误差项后,多路径组合(MP)观测值和SPP的定位精度均有一定程度提升.
Pseudo-range multipath error correction of BeiDou GEO satellites
BeiDou geostationary orbit (GEO) satellites are nearly stationary relative to the ground,and their multipath errors are more serious than other types,with systematic fluctuations. To improve positioning accuracy,this study analyzed the pseudo-range multipath error characteristics of GEO satellites and used the singular spectrum analysis method to correct the error. The effect of pseudo-range multipath error correction was verified by pseudo-range single point positioning (SPP),and static observation data from the CUT0 station over a period of 10 days were used for the correction experiment. The results find that the pseudo-range multipath error sequence of the GEO satellite exhibits strong daily repeatability,and a larger systematic error term in the multipath error indicates stronger repeatability. The correction of systematic error terms in the pseudo-range multipath errors of the GEO satellite using the singular spectrum analysis method improves the positioning accuracy to a certain extent for both multipath combination (MP) observations and SPP.

BeiDou systemBeiDou geostationary orbit (GEO) satellitepseudo-range multipath errorsingular spectrum analysispseudo-range single point positioning (SPP)positioning accuracy

李卫锋

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南京交通职业技术学院,江苏南京 211188

北斗系统 北斗系统地球静止轨道(GEO)卫星 伪距多路径误差 奇异谱分析 伪距单点定位(SPP) 定位精度

江苏省高等学校基础科学(自然科学)研究项目

23KJB430023

2024

10.19580/j.cnki.1007-3000.2024.07.017

北京测绘
北京市测绘设计研究院,北京测绘学会

北京测绘

影响因子：0.55
ISSN：1007-3000
年,卷(期)：2024.38(7)