Performance of different GIMs under low and high solar activity in Turkey

 ABSTRACT

In this study, GIM-TEC values derived from 12 different Global Ionospheric Maps (GIMs) which are produced by 7 different IGS Ionosphere Associate Analysis Center (IAACs) are compared with GPS-TEC values of IGS station of ANKR. GIM-TEC values are calculated from nearest four-grid point of the geographical coordinates of ANKR station using the simple 4-point bivariate interpolation. The sampling time of the data is selected as 2 hours for GIM-TEC and GPS-TEC to provide a reliable comparison. The comparison was applied for during 2008-2009 (low solar activity) and during 2014-2015 (high solar activity). The results show that the differences between GIM-TECs and GPS TEC is higher in equinox than solstices. In addition, the differences show increase trend in equinox and decrease trend in solstices. The differences is 2-3 times more in high solar activity than low solar activity and they are generally between 2-15 TECU in 2008 and 5-45 TECU in 2014. Yearly RMS of differences is the lowest for JPLG (final) and JPRG (rapid) which is produced by Jet Propulsion Laboratory (JPL) both low and high solar activity.

Authors: Erman Şentürk, M. Selim Çepni, Evrim Yavuz, Doğukan Durdağ, T. Serkan Irmak, İbrahim Sertçelik

Conference: Engineers of Future International Student Symposium

Date / Location: 7-9 June 2018 / Zonguldak-Turkey

Cite this paper: Şentürk, E., Çepni, M. S., Yavuz, E., Durdağ, D., Irmak, T. S., Sertçelik, İ. (2018). Performance of different GIMs under low and high solar activity in Turkey, Engineers of Future International Student Symposium (EFIS-2018), Zonguldak, Turkey, 7-9 June 2018.

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