| 偏航姿态对GPS和GLONASS精密轨道和钟差的影响 |
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| 引用本文： | 王晨,郭靖,赵齐乐.偏航姿态对GPS和GLONASS精密轨道和钟差的影响[J].武汉大学学报(信息科学版),2017,42(5):624-629. |
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| 作者姓名： | 王晨 郭靖 赵齐乐 |
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| 作者单位： | 1.武汉大学卫星导航定位技术研究中心, 湖北 武汉, 430079 |
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| 基金项目： | 国家863计划Nos. 2014AA121501国家863计划2013AA122501国家自然科学基金No. 41404032中央高校基本科研业务费专项资金No. 2042014gf026 |
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| 摘 要： | 利用全球约110个国际GNSS服务（International GNSS Service，IGS）测站2013年全年观测数据，分析和研究了GPS和全球卫星导航系统（global navigation satellite system，GLONASS）卫星偏航姿态对其精密轨道和钟差的影响。结果表明，偏航姿态对不同型号GPS卫星轨道和钟差的影响程度不同，当采用偏航姿态改正后地影期的BLOCK ⅡA型卫星轨道改善可达17 mm，BLOCK ⅡF为近5 mm，而BLOCK ⅡR几乎不受影响。由于偏航姿态对GLONASS-M卫星定轨精度影响较大，因此，当改正偏航姿态后所有GLONASS卫星相对于IGS最终轨道平均一维差异提高10 mm，相对于德国地学中心（German Research Center for Geosciences，GFZ）最终钟差平均标准差提升0.034 ns。
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| 关 键 词： | 偏航姿态 轨道 钟差 GPS GLONASS |
| 收稿时间： | 2015-01-29 |
Impact of Yaw Attitude on GPS/GLONASS Orbit and Clock Solutions |
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| Affiliation: | 1.GNSS Research Center, Wuhan University, Wuhan 430079, China |
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| Abstract: | As a key factor in GNSS data processing, the yaw attitude of GNSS satellites is closely connected to the geometrical observable error corrections and the non-conservative forces acted on satellites. The precision ofthe calculated orbit and clock (O & C) products are therefore affected by attitude models of the navigation satellites. In this contribution, observations from about 110 International GNSS Service (IGS) stations with the global distribution in 2013 are used to investigate the impacts of yaw attitude on O & C solutions of GPS and GLONASS satellites. The results demonstrate that the degree of yaw attitude on O & C varies according to the types of these navigation satellites. The orbit accuracy of the GPS BLOCK ⅡA satellites during eclipse season were improved by 17 mm, for GPS BLOCK ⅡF by nearly 5 mm, but the BLOCK ⅡR satellites were hardly affected when yaw attitude corrections are used. Compared to GPS satellites, the impact of yaw attitude on GLONASS O & C is greater, which could reach to 10 mm and 0.034 ns for O & C respectively, when the IGS final orbit and GFZ final clock solutions are taken as references. |
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