Artikelrobot
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The size of a London double-decker bus and weighing about six tons, the I-4 will deliver a 3G-compatible broadband data service to mobile users. The satellite is 60 times more powerful, and has 20 times more capacity than its predecessors, the Inmarsat-3 satellites
http://www.southgatearc.org/news/mar2005/inmarsat_3g.htm
http://www.southgatearc.org/news/mar2005/inmarsat_3g.htm