The ionosphere prediction service prototype for GNSS users Sreeja Vadakke Veettil, Claudio Cesaroni, Marcio Aquino, Giorgiana De Franceschi, Francesco Berrili, Filippo Rodriguez, Luca Spogli, Dario Del Moro, Alice Cristaldi, Vincenzo Romano et al. (4 more) J. Space Weather Space Clim., 9 (2019) A41 Published online: 06 November 2019 DOI: 10.1051/swsc/2019038