A functioning satellite that receives and transmits or retransmits radio communication signals to or from a base station.
a system which retransmits the receiving signal after signal amplification
A satellite carrying a station intended to transmit or retransmit radio communication signals.
A satellite that amplifies the received signal and retransmits it back to earth.
A satellite equipped to receive signals and to relay its own signal back to earth. Advanced Communications Technology Satellite (ACTS): A NASA satellite designed to carry a number of experimental systems that enhance the satellite's communication capabilities. ACTS is, in a sense, a prototype of the future commercial satellite communications fleet.