uplink

An uplink is a communication channel used for transmitting data from Earth to a satellite or spacecraft, or the transmissions themselves. It can also refer to the ground facility that sends these transmissions. This is a crucial part of satellite communication, where a satellite acts as a repeater, linking terrestrial transmitters to receivers. The satellite receives signals via an uplink and then transmits them back to Earth via a downlink. This technology is vital for various applications, including mobile communications, broadcasting, and data transfer, especially in areas where physical connections are impractical or too costly.12