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Performance analysis of frequency‑mixed PPP‑RTK using low‑cost GNSS chipset with different antenna configurations

Satellite Navigation 2023年第3期4卷 54-71页

作者： Xingxing Li Hailong Gou Xin Li Zhiheng Shen Hongbo Lyu Yuxuan Zhou Hao Wang Qian Zhang School of Geodesy and Geomatics Wuhan University129 Luoyu RoadWuhan 430079HubeiChina Hubei Luojia Laboratory Wuhan University129 Luoyu RoadWuhan 430079HubeiChina Tianjin Navigation Instrument Research Institute 268 Dingzigu 1St RoadTianjin 300130China Meituan 6 Wangjing East RoadChaoyang DistrictBeijingChina

low-cost Global Navigation Satellite System(GNSS)devices offer a cost-effective alternative to traditional GNSS systems,making GNSS technology accessible to a wider range of ***,low-cost GNSS devices often face the challenges in effectively capturing and tracking satellite signals,which leads to losing the observations at certain ***,the observation peculiarities of low-cost devices are in contradistinction to those of traditional geodetic GNSS *** this contribution,a low-cost PPP-RTK model that considers the unique characteristics of different types of measurements is developed and its performance is fully evaluated with u-blox F9P receivers equipped with three distinctive antenna configurations:vertical dipole,microstrip patch,and helix *** static and kinematic experiments in different scenarios are conducted to verify the effectiveness of the proposed *** results indicate that the mixed-frequency PPP-RTK model outperforms the traditional dual-frequency one with higher positioning accuracy and fixing *** the three low-cost antennas tested,the vertical dipole antenna demonstrates the best performance under static conditions and shows a comparable performance as geodetic antennas with a positioning accuracy of 0.02 m,0.01 m and 0.07 m in the east,north,and up components,*** low-speed kinematic scenarios,the helix antenna outperforms the other two with a positioning accuracy of(0.07 m,0.07 m,0.34 m).Furthermore,the helix antenna is also proved to be the best choice for vehicle navigation with an ambiguity fixing rate of over 95%and a positioning accuracy of(0.13 m,0.14 m,0.36 m).

关键词： PPP-RTK low-cost device Rapid ambiguity resolution Centimeter-level positioning accuracy Performance assessment

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