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Inmarsat-4 F1, 2, 3

Inmarsat-4 (I-4) [Astrium]

Inmarsat-4 is the fourth generation of satellites for the London-based global mobile satellite communications operator Inmarsat.

Designed to be around 100 times more powerful than the present generation and to provide a ten-fold increase in communications capacity, the satellites will support the new Broadband Global Area Network (B-GAN), to be introduced in 2004 for internet and intranet solutions, video on demand, video-conferencing, fax, e-mail, telephone and high-speed LAN access. Two of the satellites were launched in 2005 while the third remained on the ground as a spare until 2008, when it also was launched.

As prime contractor, Astrium delivered both the platform (based on the high-power Eurostar-3000GM version of Astrium's Eurostar series) and the payload, including the on-board processor.

In addition On Inmarsat-4 F3, a Wide Area Augmentation System (WAAS) navigation package operating in C-band for uplink and L-band for downlink provides precision Global Positioning System-based guidance information to aircraft at thousands of airports and landing strips that lack such a capability today.

Nation: International
Type / Application: Communication
Operator: Inmarsat
Contractors: Astrium
Equipment: L-band payload (all); GAGAN payload (#F3); EGNOS payload (#F2); WAAS payload (#F3)
Configuration: Eurostar-3000GM
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 13 years
Mass: 5959 kg (#1); 5958 kg (#2); 5960 kg (#3)
Orbit: GEO
Satellite COSPAR Date LS Launch Vehicle Remarks
Inmarsat-4 F1 (Inmarsat I-4 F1) 2005-009A 11.03.2005 CC SLC-41 Atlas-5(431)
Inmarsat-4 F2 (Inmarsat I-4 F2) 2005-044A 08.11.2005 SL Zenit-3SL (2)
Inmarsat-4 F3 (Inmarsat I-4 F3) 2008-039A 18.08.2008 Ba LC-200/39 Proton-M Briz-M (Ph.2 mod)


Further Inmarsat missions:

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