Long-term comparison of the ionospheric F2 layer electron density peak derived from ionosonde data and Formosat-3/COSMIC occultationsMarco Limberger, Manuel Hernández-Pajares, Angela Aragón-Ángel, David Altadill and Denise DettmeringJ. Space Weather Space Clim., 5 (2015) A21DOI: https://doi.org/10.1051/swsc/2015023