000005203 001__ 5203
000005203 005__ 20210127152807.0
000005203 037__ $$aCTALK-2021-0017
000005203 100__ $$aBergeot, N. 
000005203 245__ $$aInter-hemispheric comparison of the ionosphere-plasmasphere system from multi-instrumental/model approach
000005203 260__ $$c2020
000005203 269__ $$c2020-05-06
000005203 520__ $$aAn increasing demand for a better modelling and understanding of the Ionosphere-Plasmasphere system (I/Ps) is required for both scientific and public practical applications using electromagnetic wave signals reflecting on or passing through this layer. This is the case for the Global Navigation Satellite Systems (GNSS, i.e. GPS, GLONASS, Galileo) and for spacecraft designers and operators who need to have a precise knowledge of the electron density distribution. Additionally, despite the long-term ionospheric studies that have been on-going for many decades, a number of aspects are still complicated to understand and forecast accurately even in mid-latitude regions during quiet conditions. Performing inter-hemispherical climatological studies in European and South African regions should highlight differences/similarities in I/Ps response during different phases of solar activity and geophysical conditions. In that frame, the Royal Observatory of Belgium (ROB) and the South African National Space Agency (SANSA) started a collaboration named “Interhemispheric Comparison of the Ionosphere-Plasmasphere System” (BEZA-COM). The goal is to provide inter-hemispheric comparison of the I/Ps implying: (1) a characterization of the climatological behavior of the Total Electron Content (TEC) in the I/Ps, over European, South African, Arctic and Antarctica regions; (2) an identification of the mechanisms that regulate inter-hemispheric differences, asymmetries and commonalities in the I/Ps from low to high-latitudes, (3) study of the different responses of the I/Ps during extreme solar events and induced geomagnetic storms in the two hemispheres. In this paper, we reprocessed the GNSS data (GPS+GLONASS) of the dense EUREF Permanent GNSS Network (EPN) and South African TRIGNET networks as well as IGS stations for the period 1998-2018. The output consists in vertical Total Electron Content (vTEC), estimated every 15 min., and covering the central European and South African regions. The vTEC is then extracted at two conjugated locations and used to constrain empirical models to highlight the climatological behavior of the ionospheric vTEC over Europe and South Africa. From the results, we will show that the differences are quite significant. To give first answers on these differences, we also compared these models with ionosondes long-term data based models (for foF2 and hmF2) at two conjugated locations (Grahamstown and Průhonice) as well as long-term NRLMSISE O/N2 ratio. How to cite: Bergeot, N., Habarulema, J. B., Chevalier, J.-M., Matamba, T., Pinat, E., Cilliers, P., and Burešová, D.: Inter-hemispheric comparison of the ionosphere-plasmasphere system from multi-instrumental/model approach. , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18657, https://doi.org/10.5194/egusphere-egu2020-18657, 2020
000005203 536__ $$aBEZA/$$cBEZA/$$fBEZA
000005203 594__ $$aSTCE
000005203 700__ $$aHabarulema, J. B. 
000005203 700__ $$aChevalier, J.-M. 
000005203 700__ $$aMatamba, T. 
000005203 700__ $$aPinat, E. 
000005203 700__ $$aCilliers, P. 
000005203 700__ $$aBurešová, D.
000005203 773__ $$tEGU online
000005203 8560_ $$fjean-marie.chevalier@observatoire.be
000005203 85642 $$ahttps://meetingorganizer.copernicus.org/EGU2020/EGU2020-18657.html
000005203 906__ $$aContributed
000005203 980__ $$aCTALKCONT