A look at NTCM-G, a new Ionospheric model fully compatible with the Galileo Open Service. MATTEO SGAMMINI, FRANCESCO MENZIONE, JOINT RESEARCH CENTRE (JRC) OF THE EUROPEAN COMMISSION RAUL ORUS PEREZ, EUROPEAN SPACE AGENCY MAINUL HOQUE, GERMAN AEROSPACE CENTER (DLR) The Neustrelitz Total Electro