GPS phase scintillation observed over a high-latitude Antarctic station during solar minimum |
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| Authors: | Chigomezyo M Ngwira Lee-Anne McKinnell Pierre J Cilliers |
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| Institution: | 1. Department of Physics and Electronics, Rhodes University, Grahamstown, South Africa;2. Hermanus Magnetic Observatory, Hermanus, South Africa;1. Department of Geophysics, Yunnan University, Kunming, Yunnan 650091, PR China;2. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, PR China;1. National Institute for Space Research (INPE), São José dos Campos, SP, Brazil;2. Federal Institute of Education, Science and Technology of São Paulo (IFSP), Jacareí, SP, Brazil;3. National Space Science Center, Chinese Academy of Science (NSSC/CAS), Beijing, China;4. Universidad Autónoma de Nuevo León, Facultad de Ciencias Físico-Matemáticas (UANL/FCFM), Monterrey, Mexico;1. Gruaduate Program in Cartographic Sciences, Faculdade de Ciências e Tecnologia, UNESP – Universidade Estadual Paulista, Rua Roberto Simonsen, 305, 19060-900 P. Prudente, SP, Brazil;2. Department of Mathematics and Computing, Faculdade de Ciências e Tecnologia, UNESP – Universidade Estadual Paulista, Rua Roberto Simonsen, 305, 19060-900, P. Prudente, SP, Brazil;3. Department of Cartography, Faculdade de Ciências e Tecnologia, UNESP – Universidade Estadual Paulista, Rua Roberto Simonsen, 305, 19060-900, P. Prudente, SP, Brazil;1. Universidad de los Andes. Facultad de Ciencias, Departamento de Física, Mérida 5101, Edo. Mérida, Venezuela;2. Williams College, Department of Astronomy, Williamstown, MA 01267, USA |
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| Abstract: | Radio wave scintillation due to the presence of ionospheric irregularities can cause fading and phase variation of L-band navigation signals such as those used by the Global Positioning System (GPS). The high-latitude regions experience increased scintillation events under geomagnetically disturbed conditions, particularly during solar maximum. This paper presents phase scintillation measurements observed at the South African Antarctic polar research station during solar minimum conditions. In addition, a multi-instrument approach is shown in which the scintillation events are associated with auroral electron precipitation. Furthermore, it is shown that external energy injection into the ionosphere is an important factor in the development of irregularities producing scintillation. |
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