Correlation Analysis of ROTI, S4c and S4 During Ionospheric GNSS Scintillation

Zenghui Shi, Haiyang Fu, Jiayu Ma, Denghui Wang, Shaojun Feng

Peer Reviewed

Abstract: Ionospheric irregularities cause rapid random scintillations in the amplitude and phase of Global Navigation Satellite System (GNSS) signals, and the scintillation intensity can be characterized by S4 index, which provided by the specify receiver. S4c and Rate of Change of TEC index (ROTI) have been proposed as alternative parameters to character ionospheric scintillation based on the dual-frequency data for low sampling rate such as 1 Hz. However, the correlation between S4c, ROTI, and S4 remains unclear, particularly for ionospheric scintillation on positioning accuracy. First of all, we analyze an ionospheric scintillation event caused by the eruption of Tonga volcano on January 15, 2022. The experimental data is collected through Septentrio PolaRx5S at Fudan University. Secondly, we analyze the ionospheric scintillation in Sanya, Hainan on October 26, 2021. The experimental data is based on observation with 1Hz sampling rate from the BeiDou Ground Reference Stations by Qianxun Spatial Intelligence. According to the statistical results, the correlation coefficient between ROTI,S4c and S4 based on Ionospheric Scintillation Monitoring Receivers(ISMRs) are all about 0.65. Finally, we used the PPP algorithm with strong constraint of VTEC modelling to obtain position coordinates for Sanya station and preliminarily analyzed the influence of ionospheric scintillation on positioning.
Published in: Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022)
September 19 - 23, 2022
Hyatt Regency Denver
Denver, Colorado
Pages: 3022 - 3030
Cite this article: Shi, Zenghui, Fu, Haiyang, Ma, Jiayu, Wang, Denghui, Feng, Shaojun, "Correlation Analysis of ROTI, S4c and S4 During Ionospheric GNSS Scintillation," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 3022-3030. https://doi.org/10.33012/2022.18345
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