Inmarsat Satellite Transition from I3 to new I4 Satellite
May 29, 2005
Author: Bruce Dunn, SMD Telecommunications
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A successful transition from the Inmarsat I3 Satellite to the new generation I4 Satellite in the Indian Ocean Region (IOR) took place at 20.00 UTC Saturday 28 May 2005.
The entry into commercial service of the first I4 Satellite means that for the first time, subscribers to services such as Fleet 77 128kbit/s, Fleet 55 & 33 and Maritime Mini-M, will be able to use their equipment to the full in areas where previously Inmarsat-3 spot-beam coverage was incomplete. Coverage by spot beam of the entire Indian Ocean Region is now possible.
The following services will benefit from the coverage enhancement:
Fleet 77 –128kbit/s Mobile ISDN Data
Fleet 55 –64kbit/s Mobile ISDN, MPDS and fax
Fleet 33 –9.6kbit/s data, MPDS and fax
Mini-M –Voice, Fax and Data
Compared with an Inmarsat-3 satellite, the I-4 boasts 60 times more power, 25 times the receiver sensitivity, 16 times the capacity and 12 times greater efficiency in its use of radio spectrum.
The second I-4 satellite - which will cover the Atlantic Ocean Region - is currently expected to be launched later this year. Together the I-4 series of spacecraft will deliver Inmarsat's vision of Broadband for a Mobile PlanetTM.
Further details can be obtained from SMD Telecommunications, tel +27 31 205 1122 or fax +27 31 205 0999 or go to the website www.smd-marine.co.za
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