Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.490 IF 1.490
  • IF 5-year value: 1.445 IF 5-year
    1.445
  • CiteScore value: 2.9 CiteScore
    2.9
  • SNIP value: 0.789 SNIP 0.789
  • IPP value: 1.48 IPP 1.48
  • SJR value: 0.74 SJR 0.74
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 88 Scimago H
    index 88
  • h5-index value: 21 h5-index 21
ANGEO | Articles | Volume 37, issue 1
Ann. Geophys., 37, 65–76, 2019
https://doi.org/10.5194/angeo-37-65-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Ann. Geophys., 37, 65–76, 2019
https://doi.org/10.5194/angeo-37-65-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

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 et al.

Related authors

Traits of sub-kilometre F-region irregularities as seen with the Swarm satellites
Sharon Aol, Stephan Buchert, and Edward Jurua
Ann. Geophys., 38, 243–261, https://doi.org/10.5194/angeo-38-243-2020,https://doi.org/10.5194/angeo-38-243-2020, 2020
Short summary
Simultaneous Ground-based and In Situ Swarm Observations of Equatorial F-region Irregularities over Jicamarca
Sharon Aol, Stephan Buchert, Edward Jurua, and Marco Milla
Ann. Geophys. Discuss., https://doi.org/10.5194/angeo-2019-153,https://doi.org/10.5194/angeo-2019-153, 2019
Revised manuscript accepted for ANGEO
Short summary
Evaluation of the NeQuick model performance under different geomagnetic conditions over South Africa during the ascending phase of the solar cycle (2009–2012)
Sylvain M. Ahoua, John Bosco Habarulema, Olivier K. Obrou, Pierre J. Cilliers, and Zacharie K. Zaka
Ann. Geophys., 36, 1161–1170, https://doi.org/10.5194/angeo-36-1161-2018,https://doi.org/10.5194/angeo-36-1161-2018, 2018
Short summary
Statistical analysis of the correlation between the equatorial electrojet and the occurrence of the equatorial ionisation anomaly over the East African sector
Patrick Mungufeni, John Bosco Habarulema, Yenca Migoya-Orué, and Edward Jurua
Ann. Geophys., 36, 841–853, https://doi.org/10.5194/angeo-36-841-2018,https://doi.org/10.5194/angeo-36-841-2018, 2018
Short summary
GPS phase scintillation at high latitudes during geomagnetic storms of 7–17 March 2012 – Part 2: Interhemispheric comparison
P. Prikryl, R. Ghoddousi-Fard, L. Spogli, C. N. Mitchell, G. Li, B. Ning, P. J. Cilliers, V. Sreeja, M. Aquino, M. Terkildsen, P. T. Jayachandran, Y. Jiao, Y. T. Morton, J. M. Ruohoniemi, E. G. Thomas, Y. Zhang, A. T. Weatherwax, L. Alfonsi, G. De Franceschi, and V. Romano
Ann. Geophys., 33, 657–670, https://doi.org/10.5194/angeo-33-657-2015,https://doi.org/10.5194/angeo-33-657-2015, 2015
Short summary

Related subject area

Subject: Earth's ionosphere & aeronomy | Keywords: Long-term changes and trends
Long-term trends in the ionospheric response to solar extreme-ultraviolet variations
Rajesh Vaishnav, Christoph Jacobi, and Jens Berdermann
Ann. Geophys., 37, 1141–1159, https://doi.org/10.5194/angeo-37-1141-2019,https://doi.org/10.5194/angeo-37-1141-2019, 2019
Short summary

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, https://doi.org/10.1029/2011JA016998, 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, https://doi.org/10.1038/157691a0, 1946. a
Bencze, P.: Some results referring to the long-term change of ionospheric parameters, Acta Geod. Geophys. Hu., 37, 403–408, 2002. a
Publications Copernicus
Download
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.
Based on hourly averages of the total electron content (TEC), a regional model of the TEC was...
Citation