Transmission satellites are usually placed in geostationary orbit (GEO) at a height of approximately 36,000 kilometers (22,000 miles) above the Earth's equator. This type of orbit allows the satellite to remain stationary relative to a specific point on the Earth's surface, which is important for communication and broadcasting applications. Satellites in geostationary orbit have an orbital period of exactly 24 hours, which matches the Earth's rotation period, so they appear to remain fixed in the sky from the perspective of an observer on the ground. This makes it possible to use small, directional antennas on the ground to communicate with the satellite, and to maintain a stable and continuous connection over long distances.
