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Satellite Communications refer to the communications between a satellite in space and a radio station on the ground. This communications system is characterized for its wide coverage, disaster-proofness, and broadcast capability. Therefore, users of this system take advantage of these characteristic features.

Photo: Communications Satellite
Communication Satellite

The communication satellite is mainly used as a fixed line on which international telephone relays, transmission of content for television programs and the similar uses are made. In addition, it is increasingly used as a leased circuit for communications within corporations, for communications among local governments for administrative disaster prevention

Phote: Control Station
Control Station

In case the communication satellite is used as a fixed line, it is necessary to have a big antenna with more than five meters in diameter.

Photo: Large Size Earth Station
Large Size Earth Station

When the content for the television programs need to be transmitted from the site where it is collected, a vehicle such as a truck with an in-vehicle two-meter-diameter antenna is used.

Photo: In-Vehicle Type Earth Station
In-Vehicle Type Earth Station

The communication satellites with a one-meter-diameter antenna are called VSAT and are widely used for the administrative communication system for disaster prevention.

Photo: VSAT Earth Station
VSAT Earth Station
[Providers of the Photos: JSAT, KDDI, SCC]
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Copyright(C)Telecommunications Bureau of the Ministry of Internal Affairs and Communications All Rights Reserved.
Copyright(C)Telecommunications Bureau of the Ministry of Internal Affairs and Communications All Rights Reserved.