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Third I4 Satellite Launch Successfull Mobile broadband coverage of the world has taken a giant step closer with the launch of the third Inmarsat-4 (I-4) satellite.   The Inmarsat-4 F3 was launched successfully from the Baikonur Cosmodrome in Kazakhstan at 22:43 UTC on 18 August on board a Proton M rocket. Once tested and operational, the I-4 F3 will be provide satellite phone and mobile broadband services to North and South America at 98 degrees west. And together with its two sister satellites this will concluding a decade of development and a $1.5 billion investment. The current constellation of two Inmarsat4 satellites delivers mobile broadband services to 85 percent of the world’s landmass, covering 98 per cent of the world’s population. The third I4 will complete the global coverage for Inmarsat’s broadband services.   Andrew Sukawaty, CEO and Chairman of Inmarsat, said: “The Inmarsat4s are the world’s most sophisticated commercial network for mobile voice and data services, and the successful launch of the third I4 allows us to complete the global coverage for our broadband services. Once the third I4 is operational, Inmarsat will have the only fully funded next generation network for mobile satellite services.”   The Proton Breeze M is one of the few launch vehicles capable of lifting the I4 satellite – the size of a London double-decker bus and weighing six tons – into geostationary transfer orbit. The I4 F3 satellite will now undergo a period of deployment and several weeks of comprehensive tests and maneuvers before being positioned in geostationary orbit at 98º West. Inmarsat satellites are currently relied on by the world’s shipping, oil exploration, defense and aviation industries to service their communications needs. Inmarsat is also the communications channel of choice for the media when reporting from the world’s danger zones and for NGOs, government agencies and the United Nations when coordinating rescue efforts.     I-4 F3 Mission Overview Satellite Repositioning Schedule Impact time table   Inmarsat I-4 Satellite Coverage Map Inmarsat reserves the right to change details of the satellite repositioning schedule. Please monitor this site for up to date information.

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