Beskrivning : Inmarsat 4-F3 is a geostationary communications satellite of the multinational Inmarsat consortium that was launched by a Proton-M rocket from Baikonur at 22:43 UT on 18 August 2008. The 5.96 tonne (with fuel) craft carries 200 spot-beams to relay messages from mobile phones based on land, sea, or air, after parking over 98° W longitude.