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  • 1 Atmospheric Sounding Station “El Arenosillo”, National Institute of Aerospace Technology Ctra. San Juan del Puerto - Matalascanas Km. 33, 21130, Huelva, Spain
  • 2 Aeronomy and Radiopropagation Laboratory, Abdus Salam ICTP Strada Costiera 11, 34100 Trieste, Italy
  • 3 Atmospheric Sounding Station “El Arenosillo”, National Institute of Aerospace Technology Ctra. San Juan del Puerto - Matalascanas Km. 33, 21130, Huelva, Spain
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The effects of three geomagnetic storms on the ionospheric F region and the influence of the G condition on TEC estimates have been analysed by using ionospheric data from INTA El Arenosillo Atmospheric Sounding Station (37.1N, 353.3E) and GPS TEC measurements obtained at the IGS station of San Fernando (36.5N, 353.8E). The results stress the importance of these perturbations and the need of using edited ionograms.

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