Abstract
Decimeter-level positioning accuracy is the premise for most ocean applications, such as ocean development and ocean engineering construction. Although the existing real-time precise point positioning method can achieve economical decimeter to centimeter-level positioning accuracy based on Global Beidou Short Message Communication, they can only broadcast limited satellites for regional users. This is because the above method maintains minimum resolution of real-time precise satellite orbit and clock corrections using a single-card GBSMC. We proposed an ocean decimeter-level real-time BDS PPP method based on dual-card GBSMC to implement global positioning service. First, the encoding ranges of real-time precise satellite orbit and clock corrections were redefined to reduce occupied digits based on 2-month data. Second, the resolution adjustment strategy for real-time precise satellite orbit and clock corrections at the service-end was proposed to broadcast 24 global BDS-3 Middle Earth Orbit (MEO) satellites based on dual-card GBSMC device. Last, aiming at the frequency limitation of GBSMC, the real-time correction method at the user-end was employed due to the change of equivalent distance within 1 min at the centimeter-level. The proposed method was verified by six static stations around the world, and the average positioning accuracy was 0.089 m and 0.103 m in the horizontal and vertical directions, respectively. Meanwhile, compared with the original SSR scheme, the proposed method had a longer convergence time. Furthermore, the real-time kinematic ocean multi-users experiment with reference to XP service of Kongsberg DPS 132 receiver was carried out. The results showed that the positioning accuracy was 0.132 m and 0.217 m in the horizontal and vertical directions after converged.
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The GNSS data are provided by the IGS, and they are obtained through ftp://igs.gnsswhu.cn.
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Acknowledgements
The authors would like to thank the reviewers for the constructive comments to improve our manuscript and acknowledge IGS for providing the data. This research was jointly funded by the National Key Research and Development Program (No. 2021YFB3901300), the National Natural Science Foundation of China (No. 62003109), the China Postdoctoral Science Foundation (No. 2023M730831), and the Heilongjiang Province Research Science Fund for Excellent Young Scholars (No. YQ2020F009).
Funding
National Key Research and Development Program, No. 2021YFB3901300, National Natural Science Foundation of China, No. 62003109, China Postdoctoral Science Foundation, No. 2023M730831, and Heilongjiang Province Research Science Fund for Excellent Young Scholars, No. YQ2020F009.
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FY and GL wrote the manuscript. GL made the figure. JZ and ZS collected data in the experiment. All authors revised the manuscript.
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Yang, F., Li, G., Zhang, J. et al. Ocean decimeter-level real-time BDS precise point positioning based on short message communication. GPS Solut 28, 39 (2024). https://doi.org/10.1007/s10291-023-01579-2
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DOI: https://doi.org/10.1007/s10291-023-01579-2