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Learn About The Latest News Regarding Inmarsat's Historical Past

Inmarsat was chartered as an intergovernmental organization (IGO) in 1979 to exploit the emerging satellite engineering for mobile communications to enhance maritime communications, exclusively to enhance safety of life at sea. In view of the possible future benefits of giving positioning applications along with communications companies for cellular users, the organization's official purposes included the authority to provide radio determination solutions.

Inmarsat communications services commenced in February 1982. At first Inmarsat fulfilled its mandate using room resources leased from third parties. Since 1990, Inmarsat has employed satellites specified, procured, owned, and operated internally. Its 1st and second generation satellite systems provided maritime and later aeronautical and land mobile services but didn't include radio location-determination capabilities.

Through the evolution of the SBAS idea, Inmarsat played an active part in satellite navigation. In November 1990, it decided to include navigation transponders on its third generation of geostationary satellites, Inmarsat-3, developed to produce the space capability needed by WAAS and EGNOS.

Inmarsat-3 satellites alone, on the other hand, don't give sufficiently redundant coverage for EGNOS and WAAS to offer operational services all through their respective service locations. Moreover, additional GEOs will be essential to assure a correct replenishment policy when the Inmarsat-3 satellites terminate their operational life.

Navigation Payloads. In 1989, Inmarsat cooperated with the European Space Agency (ESA) on its Navsat system studies, and this led for the development of specs for navigation payloads to be embarked on geostationary satellites. Inmarsat then adopted these specs for such payloads on Inmarsat-3 and created these transponders for use as a civil complement and overlay for augmenting GPS and GLONASS.

Five Inmarsat-3 satellites had been successfully launched concerning 1996 and 1998, each carrying a dedicated navigation transponder. As stated earlier, the Inmarsat-3 navigation transponders form an integral part of WAAS and EGNOS, which boost availability, integrity and accuracy on the primary GPS and GLONASS navigation signals over North America and Europe. Inmarsat is currently the only operating supplier of navigation payloads for SBAS, with two transponders leased through COMSAT for WAAS and two leased for EGNOS.

On April 15, 1999, Inmarsat became the primary intergovernmental organization to privatize, even though it still maintains its critical public support responsibilities for maritime safety, even as a private business.

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