Search Results - "Habarulema, J. B."

Excursions of Interhemispheric Field‐Aligned Currents in Africa by Owolabi, O. P., Bolaji, O. S., Adeniyi, J. O., Oyeyemi, E. O., Rabiu, A. B., Habarulema, J. B.

“…The interhemispheric field‐aligned currents (IHFACs) are the most evident currents connecting the solar quiet (Sq) current systems in the Northern and Southern…”
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Estimating the geoeffectiveness of halo CMEs from associated solar and IP parameters using neural networks by UWAMAHORO, J, MCKINNELL, L. A, HABARULEMA, J. B

“…Estimating the geoeffectiveness of solar events is of significant importance for space weather modelling and prediction. This paper describes the development…”
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Investigating the performance of neural network backpropagation algorithms for TEC estimations using South African GPS data by HABARULEMA, J. B, MCKINNELL, L.-A

“…In this work, results obtained by investigating the application of different neural network backpropagation training algorithms are presented. This was done to…”
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Solar Flares and the Intricate Response of Earth's Outer Geomagnetic Field Variation by Fagundes, P. R., Pillat, V. G., Habarulema, J. B., Tardelli, A., Muella, M. T. A. H.

“…In this study, we investigate the intricate electrodynamics of the Earth's horizontal component of the geomagnetic field (ΔH) in response to two significant…”
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A recurrent neural network approach to quantitatively studying solar wind effects on TEC derived from GPS; preliminary results by HABARULEMA, J. B, MCKINNELL, L.-A, OPPERMAN, B. D. L

“…This paper attempts to describe the search for the parameter(s) to represent solar wind effects in Global Positioning System total electron content (GPS TEC)…”
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First Results on Characteristics of Nighttime MSTIDs Observed Over South Africa: Influence of Thermospheric Wind and Sporadic E by Katamzi‐Joseph, Z. T., Grawe, M. A., Makela, J. J., Habarulema, J. B., Martinis, C., Baumgardner, J.

“…This paper reports the climatology of medium‐scale traveling ionospheric disturbances (MSTIDs) observed between September 2018 and August 2019 in the nighttime…”
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Critical Issues in Ionospheric Data Quality and Implications for Scientific Studies by Araujo‐Pradere, E., Weatherhead, E. C., Dandenault, P. B., Bilitza, D., Wilkinson, P., Coker, C., Akmaev, R., Beig, G., Burešová, D., Paxton, L. J., Hernández‐Pajares, M., Liu, J.‐Y., Lin, C. H., Habarulema, J. B., Paznukhov, V.

“…Ionospheric data are valuable records of the behavior of the ionosphere, solar activity, and the entire Sun‐Earth system. The data are critical for both…”
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Ionospheric storm due to solar Coronal mass ejection in September 2017 over the Brazilian and African longitudes by Fagundes, PR, Tsali-Brown, VY, Pillat, VG, Arcanjo, MO, Venkatesh, K., Habarulema, JB, Bolzan, MJA, de. Jesus, R, de Abreu, AJ, Tardelli, A., Vieira, F., Denardini, CM

“…•Ionospheric disturbances over Brazilian and African due to CME, using magnetometer and VTEC.•Positive ionospheric disturbances during the geomagnetic storm…”
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Investigating different vTEC calibration methods for data assimilation in ionospheric empirical models by Pignalberi, A., Pietrella, M., Pezzopane, M., Habarulema, J.B.

“…A new data assimilation procedure in the International Reference Ionosphere UPdate (IRI UP) method has been recently implemented. This new procedure relies on…”
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Statistical analysis of the correlation between the equatorial electrojet and the occurrence of the equatorial ionisation anomaly over the East African sector by Mungufeni, Patrick, Habarulema, John Bosco, Migoya-Orué, Yenca, Jurua, Edward

“…This study presents statistical quantification of the correlation between the equatorial electrojet (EEJ) and the occurrence of the equatorial ionisation…”
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Ionospheric disturbances in a large area of the terrestrial globe by two strong solar flares of September 6, 2017, the strongest space weather events in the last decade by Fagundes, P.R., Pezzopane, M., Habarulema, J.B., Venkatesh, K., Dias, M.A.L., Tardelli, A., de Abreu, A.J., Pillat, V.G., Pignalberi, A., Bolzan, M.J.A., Ribeiro, B.A.G., Vieira, F., Raulin, J.P., Denardini, C.M., Arcanjo, M.O., Seemala, G.K.

“…•Investigated the ionospheric response to the strongest solar flare of the decade using multi-site multi-instrument observations.•Flare induced electrodynamic…”
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Unexpected Southern Hemisphere ionospheric response to geomagnetic storm of 15 August 2015 by Edemskiy, Ilya, Lastovicka, Jan, Buresova, Dalia, Habarulema, John Bosco, Nepomnyashchikh, Ivan

“…Geomagnetic storms are the most pronounced phenomenon of space weather. When studying ionospheric response to a storm of 15 August 2015, an unexpected…”
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Evaluation of the NeQuick model performance under different geomagnetic conditions over South Africa during the ascending phase of the solar cycle (2009–2012) by Ahoua, Sylvain M., Habarulema, John Bosco, Obrou, Olivier K., Cilliers, Pierre J., Zaka, Zacharie K.

“…In order to provide a scientific base to the NeQuick characterisation under disturbed conditions, the comparison of its performance for quiet and storm days is…”
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A new global version of M(3000)F2 prediction model based on artificial neural networks by Oronsaye, S.I., McKinnell, L.A., Habarulema, J.B.

“…A new version of global empirical model for the ionospheric propagation factor, M(3000)F2 prediction is presented. Artificial neural network (ANN) technique…”
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Daytime twin-peak structures observed at southern African and European middle latitudes on 8–13 April 2012 by Katamzi, Zama T., Habarulema, John Bosco, Giday, Nigussie M.

“…Daytime twin-peak structures, also known as bite-out or diurnal double-maxima structures, are ionospheric phenomena in which the diurnal ionospheric trend…”
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Determinations of ionosphere and plasmasphere electron content for an African chain of GPS stations by Mazzella, Andrew J, John Bosco Habarulema, Yizengaw, Endawoke

“…The confluence of recent instrumentation deployments in Africa with developments for the determination of plasmasphere electron content using Global…”
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Prediction of global positioning system total electron content using Neural Networks over South Africa by Habarulema, John Bosco, McKinnell, Lee-Anne, Cilliers, Pierre J.

“…Global positioning system (GPS) networks have provided an opportunity to study the dynamics and continuous changes in the ionosphere by supplementing…”
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The variability and IRI2007-predictability of hmF2 over South Africa by Mbambo, M.C., McKinnell, Lee-Anne, Habarulema, J.B.

“…This paper presents an investigation into the variability and predictability of the maximum height of the ionospheric F2 layer, hmF2 over the South African…”
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Application of neural networks to South African GPS TEC modelling by Habarulema, John Bosco, McKinnell, Lee-Anne, Cilliers, Pierre J., Opperman, Ben D.L.

“…The propagation of radio signals in the Earth’s atmosphere is dominantly affected by the ionosphere due to its dispersive nature. Global Positioning System…”
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Towards a GPS-based TEC prediction model for Southern Africa with feed forward networks by Habarulema, John Bosco, McKinnell, Lee-Anne, Opperman, Ben D.L.

“…In this paper, first results from a national Global Positioning System (GPS) based total electron content (TEC) prediction model over South Africa are…”
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