测绘学报

• 庆祝宁津生院士80华诞学术论文 • 上一篇    下一篇

北斗导航卫星系统测距信号的精度分析

程鹏飞1,李玮1,秘金钟   

  • 收稿日期:2012-07-18 修回日期:2012-07-30 出版日期:2012-10-25 发布日期:2012-10-25
  • 通讯作者: 李玮

Precision analysis of COMPASS(BeiDou) measurement signals

  • Received:2012-07-18 Revised:2012-07-30 Online:2012-10-25 Published:2012-10-25

摘要: 基于单测站和短基线实验的伪距相位差值 (Code-minus-phase Combination, CC)和多路径(Multipath, MP)两类组合观测值,对比分析了北斗(BD)和GPS测距信号质量,并检验了多路径误差对CC模糊度固定的影响。结果表明:BD GEO卫星(Geostationary Earth Orbit)的测距信号质量优于IGSO卫星(Inclined Geosynchronous Satellite Orbit),且两类测距信号的多路径误差分别包含长、短期的变化趋势。针对CC模糊度固定,当采用较长时间段(如本文中的600s)时,GPS L1/L2和BD B1/B2四个频段上的成功率均超90%;而对于快速模糊度固定(如仅采用120秒),由于受强多路径误差影响,BD IGSO卫星的固定成功率最低,不超过50%。

Abstract: A Code-minus-phase Combination (CC) and Multipath (MP) GPS and BeiDou (BD) measurements analysis approach is demonstrated, and the qualitative results of single frequency GPS and BD measurement signals are presented; the performances of CC ambiguity resolution with single frequency data is discussed lastly. The results show that: measurement signals of Geostationary Earth Orbit (GEO) satellite show a higher precision than Inclined Geosynchronous Satellite Orbit (IGSO) satellite; the multipath effects of two kinds of measurement signals behave in long-term and short-term trend. When a long period is utilized, such as 600s, the success rate of CC ambiguity resolution can reach over 90% in GPS L1/L2 and BD B1/B2 frequency, however, when short period is utilized, such as 120s, owing to the stronger multipath effects, the success rate of BD IGSO satellite is the lowest, no more than 50%.

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