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Modelling bottom and topside electron density and TEC with profile data from topside ionograms
Institution:1. Abdus Salam ICTP, Trieste, Italy;2. IZMIRAN, Troitsk, Moscow Region, Russia;1. Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia;2. Geographical Institute “Jovan Cvijić” Serbian Academy of Sciences and Arts, Djure Jakšića 9, 11000 Belgrade, Serbia;3. Perm National Research Polytechnic University, Perm, Russian Federation;4. Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia;5. Department of Telecommunications and Information Science, Military Academy, University of Defence, Generala Pavla Jurišića Šturma 33, 11000 Belgrade, Serbia;6. Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia;1. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, China;2. School of Surveying and Land Information Engineering of Henan Polytechnic University, Jiaozuo, China;3. College of Surveying and Geo-Information of Tongji University, Shanghai, China;1. GNSS Research Center, Wuhan University, Wuhan 430071, PR China;2. School of Geomatics, Xi’an University of Science and Technology, Xi’an 710054, PR China;3. Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611-0011, Japan;1. Satellite Technology Research Center, KAIST, Daejeon, Republic of Korea;2. Int. Center for Space Weather Study and Education, Kyushu U., Fukuoka, Japan;3. Space Research and Tech. Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria;4. Department of Earth Science, National Cheng Kung University, Tainan, Taiwan;5. Dep. of Physics, Gauhati University, Assam, India;6. Department of Earth and Planetary Science, Kyushu U., Fukuoka, Japan;7. Institute of Space Science, National Central U., Jhong-Li, Taiwan;1. National Center for Research on Earthquake Engineering (NCREE), NARL, Taipei, Taiwan;2. Department of Geosciences, National Taiwan University (NTU), Taipei, Taiwan;3. Institute of Earth Sciences, Academia Sinica, Taiwan;4. Department of Earth Sciences and Institute of Geophysics, National Central University, Jhongli, Taiwan
Abstract:The paper describes the technique that has been implemented to model the electron density distribution above and below the F2 peak making use of only the profiles obtained from the INTERCOSMOS-19 topside ionograms. Each single profile from the satellite height to the ionosphere peak has been fitted by a semi-Epstein layer function of the type used in the DGR model with shape factor variable with altitude. The topside above the satellite height has been extrapolated to match given values of plasmaspheric electron densities to obtain the full topside profile. The bottomside electron density has been calculated by using the maximum electron density and its altitude estimated from the topside ionogram as input for a modified version of the DGR derived profiler that uses model values for the foF1 and foE layers of the ionosphere. Total electron content has also been calculated. Longitudinal cross sections of vertical profiles from latitudes 50° N to 50° S latitude are shown for low and high geomagnetic activity. These cross sections indicate the equatorial anomaly effect and the changes of the shape of low latitude topside ionosphere during geomagnetic active periods. These results and the potentiality of the technique are discussed.
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