| 基于实时多系统PPP模糊度固定的时间传递算法 |
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| 引用本文： | 吕大千,曾芳玲,欧阳晓凤. 基于实时多系统PPP模糊度固定的时间传递算法[J]. 天文学报, 2020, 61(2): 17-72 |
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| 作者姓名： | 吕大千 曾芳玲 欧阳晓凤 |
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| 作者单位： | 国防科技大学电子对抗学院合肥230037,国防科技大学电子对抗学院合肥230037,国防科技大学电子对抗学院合肥230037 |
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| 基金项目： | 安徽省自然科学基金项目(1408085MF129)资助 |
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| 摘 要： | 随着RTS (Real-Time Service)工程的发展,时频用户可以运用实时精密单点定位(Precise Point Positioning, PPP)技术进行时间传递研究.作为RTS工程的主要参与者,CNES (Centre National d’Etudes Spatiales)分析中心开展PPPWIZARD (Precise Point Positioning with Integer and Zero-difference Ambiguity Resolution Demonstrator)工程验证实时PPP模糊度固定技术.为了探究多系统观测值和实时PPP模糊度固定对时间传递的性能提升,在综合GPS (Global Positioning System)、GLONASS (GLObal NAvigation Satellite System)、 BDS (Bei Dou navigation System)和Galileo的多系统观测值的基础上,使用CNES分析中心播发的实时产品开展PPP时间传递验证实验,检验了4种不同PPP模式的工作性能.实验结果证明,在多种不同工作模式当中,综合运用多系统观测值和GPS模糊度固定技术进行PPP时间传递的标准差结果最小,标准差相比于传统GPS PPP时间传递平均下降38.1%.
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| 关 键 词： | 天体测量学 时间比对 方法:数据分析 |
| 收稿时间： | 2019-09-09 |
Time Transfer Algorithm Using Multi-GNSS PPP with Ambiguity Resolution |
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| LYU Da-qian,ZENG Fang-ling and OUYANG Xiao-feng. Time Transfer Algorithm Using Multi-GNSS PPP with Ambiguity Resolution[J]. Acta Astronomica Sinica, 2020, 61(2): 17-72 |
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| Authors: | LYU Da-qian ZENG Fang-ling OUYANG Xiao-feng |
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| Affiliation: | College of Electronic Engineering, National University of Defense Technology, Hefei 230037% ;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011;% ;3. University of Chinese Academy of Sciences, Beijing 100049;,College of Electronic Engineering, National University of Defense Technology, Hefei 230037% ;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011;% ;3. University of Chinese Academy of Sciences, Beijing 100049; and College of Electronic Engineering, National University of Defense Technology, Hefei 230037% ;2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011;% ;3. University of Chinese Academy of Sciences, Beijing 100049; |
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| Abstract: | With the development of Real-time Service (RTS) project, timing users can apply the real-time Precise Point Positioning (PPP) technique for time transfer. As a participant in the RTS project, Centre National d''Etudes Spatiales (CNES) implements the PPPWIZARD (Precise point positioning with Integer and Zero-difference Ambiguity Resolution Demonstrator) project to validate the PPP ambiguity resolution. In order to analyze the contribution of multiple global navigation satellite system (multi-GNSS) and real-time ambiguity resolution to time transfer, our experiment used the observation from multi-GNSS, including GPS (Global Positioning System), GLONASS (GLObal NAvigation Satellite System), BDS (BeiDou navigation System), and Galileo for data processing. Meanwhile, the real-time products from CNES were utilized to examine the performance of four different PPP processing modes. The experimental results indicated that, of all the processing modes, time transfer using multi-GNSS PPP with GPS ambiguity resolution had the smallest standard deviations (STDs). The STD value was decreased by 38.1%, compared with the time transfer results using GPS PPP. |
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| Keywords: | astrometry time transfer methods: data analysis |
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