"A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth."
The technology that uses satellites to transmit information from one point on the earth to another, including topics such as orbits, transponders, and communication protocols.
"Communications satellites are used for television, telephone, radio, internet, and military applications."
"Many communications satellites are in geostationary orbit 22,300 miles (35,900 km) above the equator."
"...the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite."
"Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently."
"The high-frequency radio waves used for telecommunications links travel by line of sight and so are obstructed by the curve of the Earth."
"The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points."
"Communications satellites use a wide range of radio and microwave frequencies. To avoid signal interference, international organizations have regulations for which frequency ranges or 'bands' certain organizations are allowed to use."
"...the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite."
"A communications satellite... relays and amplifies radio telecommunication signals via a transponder."
"Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently."
"This allocation of bands minimizes the risk of signal interference."
"Communications satellites are used for television, telephone, radio, internet, and military applications."
"The high-frequency radio waves used for telecommunications links travel by line of sight."
"Many communications satellites are in geostationary orbit 22,300 miles (35,900 km) above the equator."
"Antennas on the ground have to follow the position of the satellites and switch between satellites frequently."
"Communications satellites are used for... military applications."
"A communications satellite... amplifies radio telecommunication signals via a transponder."
"Others form satellite constellations in low Earth orbit, where antennas on the ground have to follow the position of the satellites and switch between satellites frequently."
"The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points."