基于实时多系统PPP模糊度固定的时间传递算法
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国防科技大学电子对抗学院合肥230037

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P128;

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安徽省自然科学基金项目(1408085MF129)资助


Time Transfer Algorithm Using Multi-GNSS PPP with Ambiguity Resolution
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( 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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    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 (BeiDou 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%.

    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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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,(2):62-72.

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  • 收稿日期:2019-09-09
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  • 在线发布日期: 2020-03-26
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