Speaker
Description
The ionosphere is a dynamic, in-homogeneous, and electrically conductive plasma formed through the interaction of solar extreme ultraviolet (EUV) and X-ray radiation with the Earth’s upper atmosphere at altitudes of approximately 50–1000 km. Variations in ionization levels within this region significantly influence radio wave propagation and satellite-based communication systems. In this study we use Total Electron Content (TEC) as a parameter for studying ionospheric behavior due to its impact on radio communication, navigation, telemetry, tracking, and Global Navigation Satellite System (GNSS) signal propagation. We investigate long-term trends in TEC over South Africa using observations from three GNSS stations. To isolate long-term ionospheric variability, solar-cycle influence is removed using different solar activity proxies: F10.7 solar radio flux, the MgII core-to-wing index, and sunspot numbers. Monthly and yearly averaged TEC data spanning 16 to 25 years were analyzed using regression techniques to estimate long-term trends after correcting for solar activity. Results indicate a persistent negative trend in TEC across the South African mid-latitudes after accounting. Differences in trend magnitude obtained highlight the importance of proxy selection when estimating long-term ionospheric trends.
| Apply for student award at which level: | MSc |
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| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |