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.
|Type / Application:||Communication|
|Equipment:||L-band payload (all); GAGAN payload (#F3); EGNOS payload (#F2); WAAS payload (#F3)|
|Power:||2 deployable solar arrays, batteries|
|Mass:||5959 kg (#1); 5958 kg (#2); 5960 kg (#3)|
|Inmarsat-4 F1 (Inmarsat I-4 F1)||2005-009A||11.03.2005||CC SLC-41||Atlas-5(431)¹|
|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)|