Kennedy signed the Communications Satellite Act of 1962.
Manx ViaSat-IOM, ManSat, Telesat-IOM companies uses the first communications satellite ViaSat-1 that launched in 2011 and positioned at the Isle of Man registered 115.1 degrees West longitude geostationary orbit point.
Double-balanced mixers are very widely used in microwave communications, satellite communications, ultrahigh frequency (UHF) communications transmitters, radio receivers, and radar systems.
In 2004, the Indian Space Research Organisation launched EDUSAT, a communications satellite providing access to educational materials that can reach more of the country's population at a greatly reduced cost.
For long-distance calls several of these channels may be sent over a communications satellite link by frequency-division multiplexing.
The first flight of an American Hall thruster on an operational mission, was the Aerojet BPT-4000, which launched August 2010 on the military Advanced Extremely High Frequency GEO communications satellite.
TDMA was first used in satellite communication systems by Western Union in its Westar 3 communications satellite in 1979.
From June 2017, Bulgaria will have its first geostationary communications satellite.
In 2016, China launched the world’s first quantum communications satellite.
Iridium communications satellite (Iridium 33) and a Russian Cosmos 2251 communications satellite, which added hundreds more pieces of debris to the atmosphere, highlighted the need for more precise tracking of space objects.
has been used for a communications satellite covering the Moon's far side, for example, Queqiao, launched in 2018, and would be "an ideal location" for a propellant depot as part of the proposed depot-based space transportation architecture.
In a communications satellite, a satellite transponder receives signals over a range of uplink frequencies, usually from a satellite ground station; the transponder amplifies them, and re-transmits them on a different set of downlink frequencies to receivers on Earth, often without changing the content of the received signal or signals.
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