Ionospheric total electron content response to annular solar eclipse on June 21, 2020
نویسندگان
چکیده
Abstract The effects of physical events on the ionosphere structure is an important field study, especially for navigation and radio communication. paper presents spatio-temporal ionospheric TEC response to recent annular solar eclipse June 21, 2020, which spans across two continents, Africa Asia, 14 countries. This took place same day as Solstice. Global Navigation Satellite System (GNSS) based data Ionosphere Maps (GIMs), 9 International GNSS Service (IGS) stations FORMOSAT-7/COSMIC-2 (F7/C2) were utilized analyze during eclipse. phases time series determined by taking difference observed values from previous 5-day median values. results showed clear depletions in 21. These decreases between 1 TECU (15–60%) depending location IGS stations. are relatively higher at close path than those farther away. Furthermore, a reduction about −10 form equatorial plasma bubble (EPB) was GIMs at ~20° away equator towards northpole, 08:00–11:00 UT where its maximum phase located southeast Japan. Additionally, overall depletion of ~10% F7/C2 derived altitude 240 km (hmF2) all regions affected eclipse, whereas, significant fluctuations altitudes 100 km − 140 km analyzed using Savitzky-Golay smoothing filter. To prove not caused space weather, variation sunspot number (SSN), wind (VSW), disturbance storm-time (Dst), Kp indices investigated 16th 22nd June. quiet weather before proved that profiles
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 2021
ISSN: ['0273-1177', '1879-1948']
DOI: https://doi.org/10.1016/j.asr.2020.12.024