Satellite communication | Definition, History, & Facts | Britannica
2024年12月2日 · satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system.
Satellite communication - Orbit, Signals, Relay | Britannica
2024年12月2日 · A satellite is basically a self-contained communications system with the ability to receive signals from Earth and to retransmit those signals back with the use of a transponder—an integrated receiver and transmitter of radio signals.
Satellite communication - Spacecraft, Orbit, Signals | Britannica
2024年12月2日 · Satellite communication - Spacecraft, Orbit, Signals: The idea of communicating through a satellite first appeared in the short story titled “The Brick Moon,” written by the American clergyman and author Edward Everett Hale and published in The Atlantic Monthly in 1869–70.
Satellite communication - Global, Navigation, Broadcasting
2024年12月2日 · Satellite communication - Global, Navigation, Broadcasting: Advances in satellite technology have given rise to a healthy satellite services sector that provides various services to broadcasters, Internet service providers (ISPs), governments, the …
Satellite Communication | SpaceNext50 - Encyclopedia Britannica
Satellite communication, in telecommunications, the use of artificial satellites to provide communication links between various points on Earth. Satellite communications play a vital role in the global telecommunications system.
Satellite, Telecommunications, Astronomy - Britannica
2024年12月9日 · Space exploration - Satellite, Telecommunications, Astronomy: Although some early space experiments explored the use of large orbiting satellites as passive reflectors of signals from point to point on Earth, most work in the late 1950s and early ’60s focused on the technology by which a signal sent from the ground would be received by ...
communications satellite - Encyclopedia Britannica
communications satellite, Earth-orbiting system capable of receiving a signal (e.g., data, voice, TV) and relaying it back to the ground. Communications satellites have been a significant part of domestic and global communications since the 1970s.
Telecommunications media | Definition, Types, Examples, …
2024年11月23日 · Telecommunications media, equipment and systems—metal wire, terrestrial and satellite radio, and optical fibre—employed in the transmission of electromagnetic signals, facilitating mass communication and mass media.
Satellite radio | Definition & Facts | Britannica
satellite radio, type of digital broadcast, which transmits audio signals over large areas with greater clarity and consistency than conventional radio. A satellite radio service works by transmitting its signal from a ground-based station to one or more satellites orbiting Earth.
Comsat | Satellite Communications ... - Britannica Money
Comsat, private corporation authorized by the U.S. Congress in 1962 to develop commercial communications satellite systems. It was officially incorporated in 1963, with 50 percent of the stock being sold to the public and the balance to private communications companies.