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Aiming at the problem of limited ionospheric delay correction accuracy of current single-frequency receiving equipment, this paper proposes an ionospheric delayed positioning error correction method based on Transformer. Firstly, according to the spatiotemporal characteristics of total electron content (TEC) relevant parameters of solar/geomagnetic activities in China surrounding regions, features such as periodicity at various time scales and local spatial correction are designed and conducted, and TEC prediction model is built on the basis of Transformer self-attention mechanism. Next, the TEC grid data are predicted by the Transformer model, following with TEC estimation on arbitrary geographical location by space-time bilinear inverse interpolation. Finally, the ionospheric delay correction is used for pseudorange positioning error compensation and comparing with current ionospheric delay correction method of Klobuchar model, verifying the excellent performance of the proposed method for predicting and correcting positioning errors in advance.

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Method of Ionospheric Delay Positioning Error Correction Based on Transformer Model Prediction

  • 会议论文

  • 发表日期：

    2025年

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  • Hongteng Ma,
  • Mengying Lin,
  • Die Zou,
  • Ziang Wei,
  • Zhengke Wen,
  • Zixin Huang

摘要

Aiming at the problem of limited ionospheric delay correction accuracy of current single-frequency receiving equipment, this paper proposes an ionospheric delayed positioning error correction method based on Transformer. Firstly, according to the spatiotemporal characteristics of total electron content (TEC) relevant parameters of solar/geomagnetic activities in China surrounding regions, features such as periodicity at various time scales and local spatial correction are designed and conducted, and TEC prediction model is built on the basis of Transformer self-attention mechanism. Next, the TEC grid data are predicted by the Transformer model, following with TEC estimation on arbitrary geographical location by space-time bilinear inverse interpolation. Finally, the ionospheric delay correction is used for pseudorange positioning error compensation and comparing with current ionospheric delay correction method of Klobuchar model, verifying the excellent performance of the proposed method for predicting and correcting positioning errors in advance.