The award-winning Inmarsat-4 (I-4) satellites are the pride of our fleet. Sixty times more powerful than their predecessors, the I-3 series, they set a new benchmark for mobile satcoms, establishing the world’s first global 3G network and delivering our portfolio of broadband services.
Our fleet of spacecraft provides mobile and fixed communications anywhere in the world. The satellites are linked to the terrestrial telecom network via a series of ground-based satellite access stations around the globe that connect users to the internet and route their telephone calls.
Inmarsat’s satellites transmit radio waves that cover the entire planet, apart from the extreme poles. They are positioned in geosynchronous orbit in such a way that their beams form seven overlapping regions, providing seamless coverage from latitudes -82 to +82 degrees.
A new constellation of Ka-band satellites, the Inmarsat-5s, is being built by US manufacturer Boeing for launch in 2013-14. They will form the backbone of our new Inmarsat Global Xpress network, offering broadband speeds of up to 50Mbps around the world.