| 北斗导航卫星系统测距信号的精度分析 |
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| 引用本文： | 程鹏飞,李玮,秘金钟. 北斗导航卫星系统测距信号的精度分析[J]. 测绘学报, 2012, 41(5): 690-695 |
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| 作者姓名： | 程鹏飞 李玮 秘金钟 |
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| 作者单位： | 1.中国测绘科学研究院,北京,100830;2.中国测绘科学研究院,北京100830 武汉大学测绘学院,湖北武汉430079 |
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| 基金项目： | 国家863计划,国家科技支撑计划,中央高校基本科研业务费专项基金,中国测绘科学研究院科研业务经费,谨以此文祝贺宁津生院士80华诞 |
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| 摘 要： | 基于单测站和短基线试验的伪距相位差值（code-minus-phasecombination,CC）和多路径（multipath,MP）两类组合观测值,对比分析了北斗和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：北斗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,GPSL1／L2和北斗B1／B2共4个频段上的成功率均超90％
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| 关 键 词： | 北斗/GPS系统 短基线 多路径误差 模糊度固定 |
| 收稿时间： | 2012-07-18 |
| 修稿时间： | 2012-07-30 |
Precision Analysis of BeiDou Range Measurement Signals |
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| Affiliation: | CHENG Pengfei1,LI Wei1,2,BEI Jinzhong1 1.Chinese Academy of Surveying and Mapping,Beijing 100830,China;2.School of Geodesy and Geomatics,Wuhan University,Wuhan,430079,China |
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| 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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| Keywords: | BeiDou/GPS short baseline multipath error ambiguity resolution |
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