Scholarlink

<p>As a widely used high-precision positioning technology in the Global Navigation Satellite System (GNSS), research on the integrity of Real-time Kinematic (RTK) positioning holds significant practical value and industrial promise. Ionospheric anomalies constitute a critical factor affecting RTK positioning performance. However, current research primarily emphasizes ionospheric interpolation methods and accuracy improvements, with limited attention on its integrity. To address this gap, this paper proposes a comprehensive integrity monitoring framework for RTK positioning under ionospheric anomalies. The framework integrates server-side methodologies for regional satellite-specific ionospheric interpolation and generation of integrity parameters, broadcast format of correction message based on selected reference satellite, along with user-side algorithms. Verification experiments were conducted with observation data from Hong Kong during ionospheric storms. The results indicate that compared with single-baseline RTK and Network RTK (NRTK) positioning, the proposed method achieved the following improvements: The 95% positioning error is reduced from 0.196 m and 0.058 m to 0.057 m, respectively; the 99.999% positioning error is reduced from 2.179 m and 1.902 m to 0.958 m, respectively; the occurrences of Misleading Information (MI) are lowered from 5155 and 72 to 8, respectively; and the probability of MI events occurring during the statistical period is 9.86×10<sup>-6</sup> under a 3 m Horizontal Alert Limit (HAL). These findings demonstrate that the proposed method significantly enhances the integrity of RTK positioning under ionospheric anomalies, reaching a risk level of 10<sup>-5</sup>.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Integrity monitoring method for RTK positioning under ionospheric anomalies

  • 期刊论文

  • 发表日期：

    2025年12月22日

查看全文
  • Yuan Song,
  • Zhigang Huang,
  • Zihan Liu,
  • Rui Li

摘要

As a widely used high-precision positioning technology in the Global Navigation Satellite System (GNSS), research on the integrity of Real-time Kinematic (RTK) positioning holds significant practical value and industrial promise. Ionospheric anomalies constitute a critical factor affecting RTK positioning performance. However, current research primarily emphasizes ionospheric interpolation methods and accuracy improvements, with limited attention on its integrity. To address this gap, this paper proposes a comprehensive integrity monitoring framework for RTK positioning under ionospheric anomalies. The framework integrates server-side methodologies for regional satellite-specific ionospheric interpolation and generation of integrity parameters, broadcast format of correction message based on selected reference satellite, along with user-side algorithms. Verification experiments were conducted with observation data from Hong Kong during ionospheric storms. The results indicate that compared with single-baseline RTK and Network RTK (NRTK) positioning, the proposed method achieved the following improvements: The 95% positioning error is reduced from 0.196 m and 0.058 m to 0.057 m, respectively; the 99.999% positioning error is reduced from 2.179 m and 1.902 m to 0.958 m, respectively; the occurrences of Misleading Information (MI) are lowered from 5155 and 72 to 8, respectively; and the probability of MI events occurring during the statistical period is 9.86×10-6 under a 3 m Horizontal Alert Limit (HAL). These findings demonstrate that the proposed method significantly enhances the integrity of RTK positioning under ionospheric anomalies, reaching a risk level of 10-5.