Working of Satellite

This image is the working of a satellite.

Communications satellites are essentially used to relay radio waves from one place on Earth to another. The best known modern communications satellite systems are probably INMARSAT and INTELSAT.

First, there's an uplink, where data is beamed to the satellite from a ground station on Earth. Next, the satellite processes the data using a number of onboard transponders. Finally, there's the downlink, where data is sent back down to another ground station on the Earth.