Solar terminator and auroral sources for traveling ionospheric disturbances in the midlatitude F region |
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| Authors: | J.W. MacDougall P.T. Jayachandran |
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| Affiliation: | 1. Department of Electrical Engineering, Universiy of Western Ontario, London, Ont., Canada;2. Department of Physics, University of New Brunswick, Fredericton, NB, Canada;1. German Research Centre for Geosciences GFZ, Potsdam, Germany;2. Technische Universität Berlin, Germany;1. Institute of Radio Physics and Electronics, University of Calcutta, Calcutta, India;2. Frederick University, Cyprus;3. Frederick Research Center, Cyprus;1. National Space Research and Development Agency (NASRDA), Abuja, Nigeria;2. Space Physics Laboratory, Federal University of Technology, Akure, Nigeria;3. University of Lagos, Lagos, Nigeria;4. Centre for Satellite Technology, NASRDA, Abuja, Nigeria;1. Instituto Tecnológico de Aeronáutica (ITA), Divisão de Ciências Fundamentais, São José dos Campos, SP, Brazil;2. Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP), Campus Jacareí, SP, Brazil;3. Universidade do Vale do Paraíba (UNIVAP), Laboratório de Física e Astronomia, São José dos Campos, SP, Brazil;4. Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, SP, Brazil;5. Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina;6. National Atmospheric Research Laboratory (NARL), Gadanki, India;1. Ethiopian Space Science and Technology Institute, Department of Space Science and Application, Addis Ababa, Ethiopia;2. Bule Hora University, College of Natural and Computational Science, Department of Physics, Bule Hora, Ethiopia;3. South Africa National Space Agency, Space Science, Hermanus, South Africa;4. Department of Physics and Electronics, Rhodes University, Grahamstown, South Africa;5. Washera Geospace and Radar Science Laboratory, Physics Department, Bahir Dar University, Bahir Dar, Ethiopia |
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| Abstract: | The occurrence of Traveling Ionospheric Disturbances (TIDs) at a midlatitude location (London, Canada, 43°N, 81°W) has been examined using data recorded by standard 5 min ionograms during the year 2000. It is found that the dominant source of TIDs during daytime appears to be the sunrise terminator but during nighttime the sunset terminator and magnetic disturbances both contribute to the TIDs. The daytime TIDs show a weak semiannual variation with maxima in solstices. The nighttime TIDs show insignificant annual variation. |
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