The term “footprint” in the context of satellite communication and Earth observation refers to the specific area on the Earth’s surface that is covered by the signals transmitted from a satellite in space. This region represents the geographical extent where the satellite’s signals can be received with sufficient signal strength and quality to establish communication or obtain data.

The size and shape of the footprint are influenced by various factors, including the satellite’s altitude, transmitting power, antenna characteristics, and the frequency of the signals being used. Satellites in higher orbits with more powerful transmitters and larger antennas tend to have larger footprints, covering broader areas on the Earth’s surface.