OBSERVATIONAL INSIGHTS INTO TID (TRAVELING IONOSPHERIC DISTURBANCE) PROPAGATION: MULTI-INSTRUMENTAL EVIDENCE FROM SOUTH ASIA
DOI:
https://doi.org/10.71465/jgs35Keywords:
Traveling Ionospheric Disturbances, Total Electron Content, GNSS Ionospheric Monitoring, Ionosphere-Thermosphere CouplingAbstract
Traveling Ionospheric Disturbances (TIDs) are wave-like fluctuations in electron density that propagate through the ionosphere and play a critical role in space weather dynamics and radio signal degradation. This study presents a comprehensive observational analysis of TID events over South Asia using dual-frequency GPS receivers, ionosonde data, and COSMIC-2 GNSS-RO profiles from 2020–2024. Both medium-scale and large-scale TIDs were investigated through Total Electron Content (TEC) variations and spectral analysis. Key findings reveal seasonal dependence, propagation velocities of 250–800 m/s, and correlations with geomagnetic activity and atmospheric gravity waves. The insights drawn from this multi-instrumental dataset offer valuable implications for forecasting ionospheric variability and enhancing the resilience of navigation and communication systems.
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Copyright (c) 2025 Engr. Fahad Rauf (Author)

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