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Browsing by Author "Habarulema, John Bosco"

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Absence of High Frequency Echoes From Ionosondes During the 23–25 April 2023 Geomagnetic Storm; What Happened?

Habarulema, John Bosco; Zhang, Yongliang; Matamba, Tshimangadzo; Buresova, Dalia; Lu, Gang; Katamzi‐Joseph, Zama; Fagundes, Paulo Roberto; Okoh, Daniel; Seemala, Gopi (2024-03)

We report an unusual event on absence of high frequency (HF) echoes in ionosonde observations from the ionospheric F2 region during the geomagnetic storm of 23–25 April 2023. This event was observed in both southern and ...
Interhemispheric comparison of the ionosphere and plasmasphere total electron content using GPS, radio occultation and ionosonde observations

Habarulema, John Bosco; Okoh, Daniel; Bergeot, Nicolas; Buresˇova, Dalia; Matamba, Tshimangadzo; Tshisaphungo, Mpho; Katamzi-Joseph, Zama; Pinat, Elisa; Chevalier, Jean-Marie; Seemala, Gopi (2021)

We present a comparison of the ionosphere and plasmasphere total electron content over nearly geomagnetic conjugate locations Pruhonice (50:0 N, 14:6 E; 45:7 N geomagnetic), Czech Republic and Hermanus (34:4 S, 19:2 E; ...
Reconstruction of Storm-Time Total Electron Content Using Ionospheric Tomography and Artificial Neural Networks: A Comparative Study Over the African Region

Uwamahoro, Jean Claude; Giday, Nigussie M.; Habarulema, John Bosco; Joseph, Zama T. Katamzi-; Seemala, Gopi Krishna (2018)

The work presented here aims to evaluate the capabilities of Multi-Instrument Data Analysis System (MIDAS) compared with artificial neural networks (ANNs) to reconstruct storm-time total electron content (TEC) over the ...
Simultaneous storm time equatorward and poleward large-scale TIDs on a global scale

Habarulema, John Bosco; Katamzi, Zama Thobeka; Yizengaw, Endawoke; Yamazaki, Yosuke; Seemala, Gopi K. (2016)

We report on the first simultaneous observations of poleward and equatorward traveling ionospheric disturbances (TIDs) during the same geomagnetic storm period on a global scale. While poleward propagating TIDs originate ...
Storm‐time modeling of the African regional ionospheric total electron content using artificial neural networks

Okoh, Daniel; Habarulema, John Bosco; Rabiu, Babatunde; Seemala, Gopi; Wisdom, Joshua Benjamin; Olwendo, Joseph; Obrou, Olivier; Matamba, Tshimangadzo Merline (2020)

This paper presents the development of a storm‐time total electron content (TEC) model over the African sector for the first time. The storm criterion used was |Dst|≥50 nT and Kp ≥ 4. We have utilized Global Positioning ...

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