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Assessing partial ambiguity resolution and WZTD-constraint multi-frequency RTK in an urban environment using new BDS signals

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Abstract

BeiDou Navigation Satellite System (BDS) began to provide global services of positioning, navigation, and timing on July 31, 2020. The Real-time Kinematic (RTK) is one of the essential services for BDS’ precise applications. In this contribution, a BDS-3 RTK model based on the constraint of the Wet component of Zenith Tropospheric Delay (WZTD) and the partial ambiguity resolution methods is provided, in which the impact of WZTD residuals caused by both horizontal distance and height is restrained. To evaluate the performance of such a BDS-3 RTK model, a set of triple-frequency multi-constellation Global Navigation Satellite Systems vehicle-borne data is collected and processed. Results demonstrate that (1) the positioning accuracy of BDS-3 is decimeter-level to centimeter-level in terms of root mean square value while using single, dual, and triple frequency observations, which is generally close to that of GPS; (2) the positioning accuracy of BDS-3 RTK based on the new signals (B1C, B1C + B2a, and B1C + B2a + B3I) are higher than that using B1I and B3I signals; (3) the ambiguity resolution fixed rate of BDS-3 RTK is improved after applying the partial ambiguity resolution methods and WZTD constraint.

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Data availability

The data of the zero baseline and vehicle kinematic experiment can be provided by contacting the corresponding author for reasonable reasons.

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Acknowledgements

This work was partially funded by the National Key Research and Development Program of China (Grant No. 2020YFB0505802), the Young Elite Scientists Sponsorship Program by CAST (Grant No. YESS20200308), the Project funded by China Postdoctoral Science Foundation (Grant No. 2021M690192), and Beijing Postdoctoral Research Foundation (Grant No. 2021-ZZ-088).

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Authors and Affiliations

  1. School of Land Science and Technology, China University of Geosciences Beijing, No. 29 Xueyuan Road, Beijing, 100083, China

    Yu Liu, Zhouzheng Gao & Qiaozhuang Xu

  2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, No. 129 Luoyu Road, Wuhan, 430079, China

    You Li

  3. School of Electronic and Information Engineering, Beihang University, 37 Xueyuan Road, Beijing, 100191, China

    Liang Chen

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  1. Yu Liu
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  2. Zhouzheng Gao
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  3. Qiaozhuang Xu
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  4. You Li
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  5. Liang Chen
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Correspondence to Zhouzheng Gao.

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Liu, Y., Gao, Z., Xu, Q. et al. Assessing partial ambiguity resolution and WZTD-constraint multi-frequency RTK in an urban environment using new BDS signals. GPS Solut 26, 88 (2022). https://doi.org/10.1007/s10291-022-01274-8

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