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首页> 外文期刊>Journal of Geodesy >Triple-frequency PPP ambiguity resolution with multi-constellation GNSS: BDS and Galileo
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Triple-frequency PPP ambiguity resolution with multi-constellation GNSS: BDS and Galileo

机译：具有多星座GNSS的三频PPP模糊性分辨率：BDS和伽利略

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摘要

Multi-constellation GNSS (multi-GNSS) and multi-frequency signals open new prospects for fast ambiguity resolution (AR) of precise point positioning (PPP). Currently, all the BDS and Galileo satellites are capable of transmitting signals on three or more frequencies. In this contribution, we investigate the triple-frequency PPP ambiguity resolution with B1, B2 and B3 observations from BDS satellites and E1, E5a and E5b observations from Galileo satellites and evaluate the contribution of BDS+Galileo combination to triple-frequency PPP AR. The uncalibrated phase delay (UPD) products are estimated based on triple-frequency observations, and the temporal characteristic as well as the residual distributions are analyzed. Our results show that the extra-wide-lane (EWL) and wide-lane (WL) UPDs for BDS and Galileo satellites are both stable during the 30days and the daily narrow-lane (NL) UPD series are also steady with no obvious fluctuation. The Galileo UPDs exhibit better performance than BDS UPDs due to the high-quality observations. It is also interesting to find that the EWL UPD corrections for all Galileo satellites are very close to the zero. With the precise UPD products, the triple-frequency PPP AR with BDS and Galileo observations was implemented in both static and kinematic modes. Compared to the ambiguity-float solution, the performance can be significantly improved by triple-frequency PPP AR with the positioning accuracy improved by 30-70% in both static and kinematic modes. Moreover, the triple-frequency PPP fixed solutions also present better performance than the dual-frequency PPP fixed solutions in terms of time to the first fix and positioning accuracy, especially for the Galileo-only and BDS+Galileo solutions. And the fusion of multi-GNSS (BDS and Galileo) can further improve the position estimations compared to the single system with more satellites and better spatial geometry.
机译：多星座GNSS（多GNSS）和多频率信号打开新的模糊分辨率（AR）的新前景，精确点定位（PPP）。目前，所有BDS和伽利略卫星都能够在三个或更多频率上传输信号。在这一贡献中，我们研究了来自伽利略卫星的BDS卫星和E1，E5A和E5B观测的B1，B2和B3观察的三频PPP模糊性分辨率，并评估BDS + Galileo组合与三频PPP AR的贡献。基于三频观察估计未校准相延迟（UPD）产品，分析了时间特性以及剩余分布。我们的研究结果表明，BDS和伽利略卫星的超宽车道（EWL）和宽车道（WL）更新既稳定在30天，日常窄车道（NL）UPD系列也稳定，没有明显波动。由于高质量观测，伽利略更新表现出比BDS UPDS更好的性能。发现所有伽利略卫星的EWL UPD校正也非常接近零点也很有意思。利用精确的更新产品，具有BDS和Galileo观测的三频PPP AR在静态和运动模式中实现。与模糊性浮点溶液相比，通过三频PPP AR可以显着提高性能，定位精度在静态和运动模式中提高了30-70％。此外，三频PPP固定解决方案还比第一次固定和定位精度的时间内比双频PPP固定解决方案提供更好的性能，尤其是仅适用于伽利略和BDS + Galileo解决方案。与具有更多卫星和更好的空间几何形状的单个系统相比，多GNSS（BDS和GALILEO）的融合可以进一步改善位置估计。

著录项

  • 来源
    《Journal of Geodesy》 |2019年第8期|1105-1122|共18页
  • 作者

    Li Xingxing; Li Xin; Liu Gege; Feng Guolong; Yuan Yongqiang; Zhang Keke; Ren Xiaodong;

  • 作者单位

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China|German Res Ctr Geosci GFZ D-14473 Potsdam Germany;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

    Wuhan Univ Sch Geodesy & Geomat 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Precise point positioning; Uncalibrated phase delay; Ambiguity resolution; Multi-GNSS; Multi-frequency;

    机译：精确点定位;未校准的相位延迟;歧义分辨率;多GNSS;多频率;

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