A STUDY OF SEASONAL IONOSPHERIC DISTURBANCES IN THAILAND USING GPS DATA DURING 2023
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Abstract
The ionosphere is a layer of Earth's atmosphere that plays a crucial role in communication and Global Navigation Satellite System (GNSS) positioning. The free electrons within this layer can affect the propagation of radio signals, leading to distortions or signal loss. Therefore, studying ionospheric disturbances is essential for the development of communication systems and satellite-based surveying and mapping. This research investigated ionospheric disturbances in Thailand using GNSS data from 12 Continuously Operating Reference Stations (CORS) managed by the Royal Thai Survey Department in 2023. Results indicate that the disturbance of the ionosphere in Thailand is correlated with both region and season. The highest variability in Total Electron Content (TEC) and Rate of Total Electron Content index (ROTI) was observed in the northern region and during the summer. Furthermore, the highest ROTI disturbance often occurred between 7:00 PM and 11:00 PM. These findings can be applied to identify periods with varying levels of ionospheric disturbance in Thailand and to study their impact on GNSS positioning accuracy.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
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