It is basically a repeater in space. The satellite receives RF signals from earth and retransmits the signals back to a land or mobile station on earth.
Sisiphindi nje esisemajukujukwini. Isethelayithi yamkela imiqondiso ye-RF esuka emhlabeni ukuze iyithumele emva emhlabeni kwakhona okanye kwisikhululo esenziwayo esisemhlabeni.