ABSTRACT
This thesis highlights the role that transionospheric radio propagation (with particular interest on global positioning system (GPS)) plays in enhancing aviation safety. The ionosphere over equatorial latitudes is characterized with high dynamics (irregularities) that may challenge the performance of transionospheric radio system, especially on phenomenal days. The objectives of this work are to: investigate how ionospheric irregularities grow and evolve, and thereafter assess their potential consequences on transionospheric radio system, develop mitigation strategies to reduce effects of ionospheric irregularities on systems' performances, elucidate operational principles of GPS using numerical approach, with a view to assisting future modeling efforts; and finally design a robust safety technique for aviation industry using GPS-based initiatives.
The methodology follows two approaches: (1) mathematical modeling, and (1) analyses of experimental observations. The growth and evolution of ionospheric irregularities is investigated from nonlinear dynamics perspective, and revealed to have bifurcation patterns. This was thereafter explained to have interpretable correlations with scintillations. The model result shows good agreement with experimental observations obtained by previous workers. The phase screen model part of this study concludes that sustainability of transmission coherency depends on (1) centre frequency of propagation, and (ii) extent of fluctuations (scintillations) in the ionosphere.
OKE-OVIE, A (2021). Simulation Of Ionospheric Irregularities On Transionospheric Radio Systems For The Enhancement Of Safety In The Aviation Industry. Afribary. Retrieved from https://track.afribary.com/works/simulation-of-ionospheric-irregularities-on-transionospheric-radio-systems-for-the-enhancement-of-safety-in-the-aviation-industry
OKE-OVIE, AKALA "Simulation Of Ionospheric Irregularities On Transionospheric Radio Systems For The Enhancement Of Safety In The Aviation Industry" Afribary. Afribary, 06 May. 2021, https://track.afribary.com/works/simulation-of-ionospheric-irregularities-on-transionospheric-radio-systems-for-the-enhancement-of-safety-in-the-aviation-industry. Accessed 27 Nov. 2024.
OKE-OVIE, AKALA . "Simulation Of Ionospheric Irregularities On Transionospheric Radio Systems For The Enhancement Of Safety In The Aviation Industry". Afribary, Afribary, 06 May. 2021. Web. 27 Nov. 2024. < https://track.afribary.com/works/simulation-of-ionospheric-irregularities-on-transionospheric-radio-systems-for-the-enhancement-of-safety-in-the-aviation-industry >.
OKE-OVIE, AKALA . "Simulation Of Ionospheric Irregularities On Transionospheric Radio Systems For The Enhancement Of Safety In The Aviation Industry" Afribary (2021). Accessed November 27, 2024. https://track.afribary.com/works/simulation-of-ionospheric-irregularities-on-transionospheric-radio-systems-for-the-enhancement-of-safety-in-the-aviation-industry