Study of high-latitude ionosphere: One-year campaign over Husafell, Iceland

S. A. Bahari*, M. Abdullah, A. M. Hasbi, B. Yatim, W. Suparta, A. Kadokura, G. Bjornsson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Publication statusPublished - 1 Jul 2016

Bibliographical note

Funding Information:
This research is partly funded by the Malaysian Government through Universiti Kebangsaan Malaysia under the following Grant – GUP-2013-047 . The authors are grateful to the Science Institute, University of Iceland (SIUI), and the National Institute of Polar Research (NIPR), Japan for their cooperation on the installation and management of the GPS station at Husafell.

Publisher Copyright:
© 2016 Elsevier Ltd.

Other keywords

  • Diurnal
  • GPS
  • High latitude
  • Seasonal
  • TEC


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