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<p>As a fundamental BeiDou navigation satellite system (BDS) service, single point positioning cannot meet high enough requirements, then BeiDou satellite-based augmentation system (BDSBAS) is a relatively better choice that has better precision and reliability. Although it simultaneously provides both B2a and B1C services, limited studies focus on how to integrate these two services since they have their own pros and cons. In this study, an integrated BDSBAS (InBDSBAS) framework combining B2a and B1C services is proposed to improve the performance of BDSBAS. Specifically, in the InBDSBAS framework, the B1C messages are preferred for correcting ionospheric delays, and the B2a messages are used first to correct satellite orbit errors and clock offsets for both GPS and BDS. In this way, the B1C, B2a, and broadcast ephemeris messages are resiliently utilized in the InBDSBAS framework. Furthermore, static and kinematic experiments are adopted to verify the performance of the InBDSBAS framework. The results demonstrate that the InBDSBAS mode can resiliently utilize various observations and messages. The proposed method consistently shows the largest number of available satellites and the lowest position dilution of precision values compared to the BDSBAS-B1C and BDSBAS-B2a modes. Therefore, the InBDSBAS framework can achieve better accuracy, where the mean accuracies can reach 0.8&#xa0;m and 1.6&#xa0;m in horizontal and three-dimensional directions, respectively. Otherwise, the InBDSBAS can also present the highest availability whether in static or kinematic environments. In conclusion, the B1C, B2a, and broadcast ephemeris messages in the InBDSBAS framework are all effective, contributing to its overall enhanced performance.</p>

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Integrated BeiDou satellite-based augmentation system framework combining B2a and B1C services

  • 期刊论文

  • 发表日期：

    2025年3月4日

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  • Zhetao Zhang,
  • Hao Wang

摘要

As a fundamental BeiDou navigation satellite system (BDS) service, single point positioning cannot meet high enough requirements, then BeiDou satellite-based augmentation system (BDSBAS) is a relatively better choice that has better precision and reliability. Although it simultaneously provides both B2a and B1C services, limited studies focus on how to integrate these two services since they have their own pros and cons. In this study, an integrated BDSBAS (InBDSBAS) framework combining B2a and B1C services is proposed to improve the performance of BDSBAS. Specifically, in the InBDSBAS framework, the B1C messages are preferred for correcting ionospheric delays, and the B2a messages are used first to correct satellite orbit errors and clock offsets for both GPS and BDS. In this way, the B1C, B2a, and broadcast ephemeris messages are resiliently utilized in the InBDSBAS framework. Furthermore, static and kinematic experiments are adopted to verify the performance of the InBDSBAS framework. The results demonstrate that the InBDSBAS mode can resiliently utilize various observations and messages. The proposed method consistently shows the largest number of available satellites and the lowest position dilution of precision values compared to the BDSBAS-B1C and BDSBAS-B2a modes. Therefore, the InBDSBAS framework can achieve better accuracy, where the mean accuracies can reach 0.8 m and 1.6 m in horizontal and three-dimensional directions, respectively. Otherwise, the InBDSBAS can also present the highest availability whether in static or kinematic environments. In conclusion, the B1C, B2a, and broadcast ephemeris messages in the InBDSBAS framework are all effective, contributing to its overall enhanced performance.