Description Of The Service - Capsat TT-3080A User Manual

Hardware interfaces Hardware interfaces
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Description of the service

Description of the service
The Inmarsat Global Area Network service is based on 4 geo-
stationary satellites situated above the equator. Geo-stationary
means that the satellites are always situated above the same
position of the earth. Each satellite covers a certain area of the
earth and each satellite supports a number of spot-beams making
the service available on all most all land on the earth between
70°N and 70°S.
The network is managed by means of the so-called Network
Coordination Stations (NCS), which are run by Inmarsat. The
primary functions of the NCSs are to constantly keep track of
which terminals are turned on/logged in and which are not.
The gateway between the terrestrial network and the satellite
part of the system is taken care by the Land Earth Stations (LES).
The LESs are run by different operators. Currently 6 LES
operators support all the services of the Global Area Network.
The Global Area Network service is provided to the end-user by
the Inmarsat Service Providers (ISP). All LES operators are also
ISPs, but other ISPs does exist. The latter has an agreement with
one or more of the LES operators in order to use their LESs.
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Description of the service Description of the service
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