Scholarlink

<p>The dual-frequency combination of Global Navigation Satellite System (GNSS) signals plays a crucial role in ionospheric monitoring. At present, the majority of GNSS satellites emit multiple signals across various frequency bands. This offers the opportunity of estimating the ionospheric total electron content (TEC) from multiple dual-frequency combinations. The Rate of TEC index (ROTI) is calculated from dual-frequency phase measurements and it serves to quantify the dynamic variations in the slant TEC (STEC) by reducing datum deviations through differentiating. This study evaluates the performance of different dual-frequency combinations from the BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), and Galileo constellation in estimating TEC. To achieve this, the ROTI index is used as a proxy, and its variability is closely linked to the quality of TEC estimation. The ROTI values derived from different dual-frequency combinations exhibit inherent differences, which remain consistent over a long-time scale. The intra-combination frequency difference and the performance of individual signals are factors that influence the TEC estimation. The optimal dual-frequency combinations are L2I-L5P for BDS, L1C-L2W for GPS, and L1C-L8Q for Galileo, respectively. Moreover, ROTI could also be affected by the satellite orbit plane change, which is quantified by the solar beta angle of the satellite orbital plane.</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

Performance of GNSS dual-frequency combinations in estimating TEC based on ROTI

  • 期刊论文

  • 发表日期：

    2025年11月15日

查看全文
  • Zhiyao Li,
  • Jiahao Zhong,
  • Ningbo Wang,
  • Yongqiang Hao,
  • Xin Wan,
  • Jing Zhao

摘要

The dual-frequency combination of Global Navigation Satellite System (GNSS) signals plays a crucial role in ionospheric monitoring. At present, the majority of GNSS satellites emit multiple signals across various frequency bands. This offers the opportunity of estimating the ionospheric total electron content (TEC) from multiple dual-frequency combinations. The Rate of TEC index (ROTI) is calculated from dual-frequency phase measurements and it serves to quantify the dynamic variations in the slant TEC (STEC) by reducing datum deviations through differentiating. This study evaluates the performance of different dual-frequency combinations from the BeiDou Navigation Satellite System (BDS), Global Positioning System (GPS), and Galileo constellation in estimating TEC. To achieve this, the ROTI index is used as a proxy, and its variability is closely linked to the quality of TEC estimation. The ROTI values derived from different dual-frequency combinations exhibit inherent differences, which remain consistent over a long-time scale. The intra-combination frequency difference and the performance of individual signals are factors that influence the TEC estimation. The optimal dual-frequency combinations are L2I-L5P for BDS, L1C-L2W for GPS, and L1C-L8Q for Galileo, respectively. Moreover, ROTI could also be affected by the satellite orbit plane change, which is quantified by the solar beta angle of the satellite orbital plane.