Articles | Volume 37, issue 1
Regular paper
30 Jan 2019
Regular paper |  | 30 Jan 2019

Modeling of GPS total electron content over the African low-latitude region using empirical orthogonal functions

Geoffrey Andima, Emirant B. Amabayo, Edward Jurua, and Pierre J. Cilliers

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Cited articles

Adewale, A. O., Oyeyemi, E. O., Adeloye, A. B., Ngwira, C. M., and Athieno, R.: Responses of equatorial F region to different geomagnetic storms observed by GPS in the African sector, J. Geophys. Res., 116, A12319,, 2011. a
Anderson, D. N., Mendillo, M., and Herniter, B.: A semi-empirical low-latitude ionospheric model, Radio Sci., 22, 292–306, 1987. a
Andima, G., Jurua, E., Amabayo, E. B., and Habarulema, J. B.: Statistical analysis of TEC perturbations over a low latitude region during 2009-2013 ascending solar activity phase, Adv. Space Res., 56, 2542–2551, 2015. a, b
Appleton, E. V.: Two Anomalies in the Ionosphere, Nature, 157, 691,, 1946. a
Bencze, P.: Some results referring to the long-term change of ionospheric parameters, Acta Geod. Geophys. Hu., 37, 403–408, 2002. a
Short summary
Based on hourly averages of the total electron content (TEC), a regional model of the TEC was constructed. Annual averages calculated from monthly medians of the detrended TEC were used to estimate any trends in the TEC over the African low latitudes. A predominantly negative trend in the ionospheric TEC was observed in the vicinity of the dip equator.