Climatology of total electron content near the dip equator under geomagnetic quiet-conditions |
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| Authors: | CC Lee YJ Chuo FD Chu |
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| Institution: | 1. General Education Center, Ching Yun University, Jhongli, Taiwan;2. Department of Information Networking and System Administration, Ling Tung University, Taichung, Taiwan;3. National Standard Time and Frequency Laboratory, Telecommunication Laboratories, Chunghwa Telecom Co., Ltd., Taiwan;1. Asian Institute of Technology, School of Engineering and Technology, RS&GIS Field of Study, P.O. Box 4, Klong Laung, Pathumthani 12120, Thailand;2. Tropical Marine Science Institute, National University of Singapore, S2S, 18 Kent Ridge Road, Singapore 119227, Singapore;1. Department of Physics, University of Lagos, Akoka, Yaba, Lagos, Nigeria;2. Institute of Maritime Studies, University of Lagos, Akoka, Yaba, Lagos, Nigeria;1. Pwani University, School of Pure and Applied Sciences, Department of Mathematics and Physics, PO Box 195-80108, Kilifi, Kenya;2. Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy;3. GFZ German Research Centre for Geosciences, Potsdam, Germany;4. South African National Space Agency, Space Science Directorate, PO Box 32, Hermanus, South Africa;5. Department of Electrical Engineering, University of Cape Town, Private Bag, Rondebosch 7701, South Africa;1. Institute of Geophysics, Vietnam Academy of Science and Technology, A8, 18 Hoang Quoc Viet Str., Cau Giay Dist., Hanoi, Viet Nam;2. LPP/UPMC/Polytechnique/CNRS, UMR 7648, 4 Avenue de Neptune 94 107 Saint-Maur-des-Fossés, France;3. Lab-STICC, UMR 6285, Mines-Télécom Télécom Bretagne CS 83818, 29288 Brest cédex 3, France;4. Institut d’Electronique et de Télécommunication, Université de Rennes, Bât 11D, Campus Beaulieu, 35042 Rennes cédex, France;5. CNST, France télécom, France |
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| Abstract: | This study analyzes the TEC data during 1998–2007, observed by the AREQ (16.5°S, 71.5°W) GPS station to investigate the equatorial ionospheric variations under geomagnetic quiet-conditions. The diurnal TEC values generally have a maximum value between 1330 and 1500 LT and a minimum around 0500 LT. For the seasonal variation, the semi-annual variation apparently exists in the daytime TEC with two peaks in equinoctial months. In contrast, this semi-annual variation is not found in the nighttime. Furthermore, the results of the annual variation show that the correlation between the daytime TEC value and the solar activity factor is highly positive. |
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