picture of the encyclopedia
previous next
Focus
Version 0.81 comes with a new web design! Please allow popups for navigation.

Program: Inmarsat


INternational MARitime SATellite

Inmarsat was created by the International Maritim Organization (dependent of the United Nations) on 16 Jul 1979. It is based in London and started working on 1 Feb 1982. Inmarsat must provide links between maritime mobiles and ground networks using geostationary satellites. The services are telephone, telex, fax and an access to the emergency system Sarsat/Cospas.

Inmarsat's structure is close to Intelsat's one. It isn't dominated by the United States which enabled USSR to join in.

The organization gathered 48 members in 1986 and 64 in 1991. The first operational system opened in 1985. Transponders were leased on 6 satellites: Marisat, Marecs and Intelsat. With the success encountered Inmarsat decided in 1983 to operate its own satellites.

Over 20 ground stations have been installed and in 1992 over 15000 terminals had been sold. The states that mostly participate in the funding are the United States, Norway, the UK and Japan.
Inmarsat is also working on aeronautical links and a project of personnal communication medium. Inmarsat might develop low orbit satellites on polar orbits to cover Northern and Southern regions.

Inmarsat was privatized in March 1999. An intergovernmental body called International Mobile Satellite Organization (IMSO) was created to manage the public service obligations (mainly the Global Maritime Distress and Safety System (GMDSS)). The rest of the activities are held by a private entity (IPO in June 2005).

The fourth generation satellites introduced in 2005 provides internet links (BGAN) at upto 432 kbps .

Inmarsat is planning MSS services by 2010 in the 2 GHz band. It should serve the US from 113°W

Inmarsat 5 generation: 3 Ka-band satellites were ordered from Boeing in mid-2010 (1 additional in Oct 2013 for a cost between $220 and $250 million). 702 HP-based. 89 beams. Options include 2 other satellites. To be delivered in 36-months. Cost is estimated at $1.2 billion over 4.5 years, including launch services and ground segment. First launch in 2013 on Proton.

External resources


http://www.gmdss.com/

http://www.igx.com/

© TBS Internet, all rights reserved. All reproduction, copy or mirroring prohibited. Legal notice
francais anglais contact