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Intercosmos-19 observations of an additional topside ionization layer: the F3 layer
Institution:1. LAMCSCI, Faculty of Sciences, Mohammed V University, B.P. 1014, Rabat, Morocco;2. National Centre for Energy, Sciences and Nuclear Techniques (CNESTEN), Rabat, Morocco;1. Laboratoire de Magnetisme et Physique des hautes Energies, URAC 12, Departement de physique, B.P. 1014, Faculté des sciences, Université Mohammed V, Rabat, Morocco;2. Institute for Nanomaterials and Nanotechnology, MASCIR (Moroccan Fondation for Advanced Science, Innovation and Research), Rabat, Morocco;3. Hassan II Academy of Science and Technology, Rabat, Morocco;1. Institute of Earth and Environmental Science, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany;2. Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 4.3, Organic Geochemistry, Telegrafenberg, D-14473 Potsdam, Germany;3. Senckenberg Research Institute, Research Station of Quaternary Palaeontology, Am Jakobskirchhof 4, D-99423 Weimar, Germany;4. Indian Institute of Geomagnetism, New Panvel, Navi Mumbai, India;5. Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 5.1, Geomorphology, Organic Surface Geochemistry Lab, Telegrafenberg, D-14473 Potsdam, Germany;1. Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany;2. Department of Earth Sciences, Indian Institute of Science Education and Research, 741252 Kolkata, India;3. Institute for Earth- and Environmental Science, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany;4. Limnology and Fisheries Laboratory, Centre of Research for Development, University of Kashmir, India;5. Universität Hamburg, Institute of Biogeochemistry and Marine Chemistry, Hamburg, Germany;6. Indian Institute of Geomagnetism, Navi Mumbai, India
Abstract:Spatial properties of an additional ionization layer in the topside ionosphere were investigated using Intercosmos-19 satellite ionograms. The data under analysis were choosen for equinoctial conditions of the high solar activity period (1979–1981). The F3 layer was detected in a narrow longitude sectors (about 60°) between the equatorial anomaly crests. Its intensity has a maximum just above the equator and decreases poleward within ±10° dip. A nighttime F3 layer was observed as well as the daytime events.
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