| 顾及卫星姿态的多系统精密钟差产品综合 |
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| 引用本文： | 毛姝尹,魏娜,温强,闫哲.顾及卫星姿态的多系统精密钟差产品综合[J].全球定位系统,2022,47(2):13-20. |
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| 作者姓名： | 毛姝尹 魏娜 温强 闫哲 |
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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, 武汉 430079 |
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| 基金项目： | 国家自然科学基金 (41774007)；国家自然科学基金 (42025401)；国家重点研发项目(2018YFC1504002) |
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| 摘 要： | 国际GNSS服务(IGS)提供的GPS综合产品被广泛应用于各种高精度科学研究中. 随着各国卫星导航系统的发展，亟需研究针对多系统全球卫星导航系统(GNSS)产品的综合策略. 由于卫星姿态与钟差相互耦合，综合钟差时额外考虑姿态改正将进一步提高综合产品精度，因此研究了一种顾及卫星姿态的GNSS钟差综合策略，改正姿态后GPS综合残差最大可减小80%. 对142个IGS测站进行精密单点定位(PPP)解算发现，综合产品比单个分析中心产品更加稳定，东(E)、北(N)、高(U)方向的动态定位精度最大可提升22.7%、16.7%和18.3%. 相对于未顾及姿态改正的综合产品，顾及姿态改正的综合产品的动态定位精度最大可提升65.3%.
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| 关 键 词： | 多系统全球卫星导航系统(GNSS) 钟差综合 姿态 钟差一致性 精密单点定位(PPP) |
| 收稿时间： | 2021-11-18 |
Multi-GNSS clock combination with satellite attitude correction |
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| Institution: | 1.GNSS Research Center, Wuhan University, Wuhan 430079, China2.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China |
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| Abstract: | International GNSS Service (IGS) has been continuously providing high-precision combined GPS orbit and clock products, which is widely used in various scientific research and operational applications. However, with the prosperity of Global Navigation Satellite System (GNSS), combination strategies of multi-GNSS (GPS, GLONASS, Galileo and BDS) products is now urgently needed. Besides, due to the coupling relationship between satellite attitudes and clocks, the clock consistency during combination can be further improved by considering attitude differences. Therefore, we proposed a multi-GNSS clock combination strategy considering attitude correction. It is found that GPS clock combination residuals can be reduced by 80% at most after applying attitude correction. Additionally, we conducted static and kinematic positioning for 142 globally distributed stations using the combined products. Compared to the products provided by a single analysis center, the GPS/GLONASS/Galileo combined products are more stable and can improve the positioning quality up to 22.7%, 16.7% and 18.3% for the three components during kinematic positioning. Adding attitude corrections during clock combination can improve the kinematic positioning accuracy up to 65.3% at a single station. |
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