Learn About The Most Up-To-Date News Regarding Inmarsat's Background

Inmarsat was chartered as an intergovernmental group (IGO) in 1979 to exploit the emerging satellite technology for mobile communications to enhance maritime communications, particularly to boost security of existence at sea. In view from the potential future benefits of providing positioning applications along with communications companies for mobile users, the organization's official purposes involved the authority to present radio determination products and services.

Inmarsat communications providers commenced in February 1982. Initially Inmarsat fulfilled its mandate using space resources leased from third parties. Since 1990, Inmarsat has employed satellites specified, procured, owned, and operated internally. Its very first and second generation satellite methods offered maritime and later aeronautical and land cellular providers but did not consist of radio location-determination capabilities.

Throughout the evolution of the SBAS idea, Inmarsat played an active role in satellite navigation. In November 1990, it determined to contain navigation transponders on its 3rd generation of geostationary satellites, Inmarsat-3, developed to provide the space capacity needed by WAAS and EGNOS.

Inmarsat-3 satellites alone, on the other hand, do not give sufficiently redundant coverage for EGNOS and WAAS to provide operational companies through their respective service areas. Moreover, more GEOs will be essential to assure a proper replenishment policy when the Inmarsat-3 satellites terminate their operational existence.

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

5 Inmarsat-3 satellites have been successfully launched between 1996 and 1998, each carrying a dedicated navigation transponder. As mentioned earlier, the Inmarsat-3 navigation transponders form an integral part of WAAS and EGNOS, which boost availability, integrity and accuracy from the key GPS and GLONASS navigation signals above North America and Europe. Inmarsat is presently 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 first intergovernmental group to privatize, though it still maintains its critical public service responsibilities for maritime security, even being a private corporation.

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