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High-precision GNSS ocean positioning with BeiDou short-message communication

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Abstract

The current popular GNSS RTK technique would be not applicable on ocean due to the limited communication access for transmitting differential corrections. A new technique is proposed for high-precision ocean RTK, referred to as ORTK, where the corrections are transmitted by employing the function of BeiDou satellite short-message communication (SMC). To overcome the limitation of narrow bandwidth of BeiDou SMC, a new strategy of simplifying and encoding corrections is proposed instead of standard differential corrections, which reduces the single-epoch corrections from more than 1000 to less than 300 bytes. To solve the problems of correction delays, cycle slips, blunders and abnormal epochs over ultra-long baseline ORTK, a series of powerful algorithms were designed at the user-end software for achieving the stable and precise kinematic solutions on far ocean applications. The results from two long baselines of 240 and 420 km and real ocean experiments reveal that the kinematic solutions with horizontal accuracy of 5 cm and vertical accuracy of better than 15 cm are achievable by convergence time of 3–10 min. Compared to commercial ocean PPP with satellite telecommunication, ORTK is of much cheaper expense, higher accuracy and shorter convergence. It will be very prospective in many location-based ocean services.

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Acknowledgements

This study is sponsored by National Natural Science Foundation of China (41574023, 41622401 and 41374031), The Scientific and Technological Innovation Plan from Shanghai Science and Technology Committee (17511109501, 17DZ1100802 and 17DZ1100902), The National Key Research and Development Program of China (2016YFB0501802), and the Fundamental Research Funds for the Central Universities.

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  1. College of Surveying and GeoInformatics, Tongji University, Shanghai, 200092, China

    Bofeng Li, Zhiteng Zhang, Nan Zang & Siyao Wang

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  1. Bofeng Li
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  2. Zhiteng Zhang
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  3. Nan Zang
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  4. Siyao Wang
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Correspondence to Bofeng Li.

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Li, B., Zhang, Z., Zang, N. et al. High-precision GNSS ocean positioning with BeiDou short-message communication. J Geod 93, 125–139 (2019). https://doi.org/10.1007/s00190-018-1145-z

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