Study of high-latitude ionosphere: One-year campaign over Husafell, Iceland
| Autor: | Siti Aminah Bahari, Akira Kadokura, Alina Marie Hasbi, Wayan Suparta, Mardina Abdullah, Baharudin Yatim, Gunnlaugur Björnsson |
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| Rok vydání: | 2016 |
| Předmět: |
Atmospheric Science
Daytime 010504 meteorology & atmospheric sciences Total electron content TEC Sunset 010502 geochemistry & geophysics Atmospheric sciences 01 natural sciences Geophysics Earth's magnetic field Space and Planetary Science VTEC Sunrise Environmental science Ionosphere 0105 earth and related environmental sciences |
| Zdroj: | Journal of Atmospheric and Solar-Terrestrial Physics. 145:45-52 |
| ISSN: | 1364-6826 |
| Popis: | This paper reports on the effects of diurnal, seasonal, geomagnetic and solar activity on GPS Vertical Total Electron Content (VTEC) measurements at a high-latitude station in Husafell, Iceland (64.7°N, 21.0°W) from March 2009 to February 2010. According to the diurnal VTEC pattern, there was generally a build-up region at sunrise (0500-1000 LT), a daytime plateau in the afternoon (1200-1400 LT), and a decay region from evening to pre-dawn (1800-0400 LT). The month-to-month analysis showed high VTEC variability, particularly in February 2010, due to an increase in solar activity. The VTEC showed a high variability during both winter and the equinoxes, with the highest value being 90%, but showed a low variability in summer. Two abnormal peaks appeared at sunrise and sunset in winter and the equinoxes. These peaks were the result of steep density gradients caused by the onset and turnoff of solar radiation. The correlation analysis yielded almost no correlation between the VTEC and geomagnetic activity but showed a high correlation with solar activity for all the seasons, particularly at night-time. |
| Databáze: | OpenAIRE |
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