Geosynchronous Orbit (High Earth Orbit)

Geosynchronous orbits are also referred to as "High Earth Orbit" due to the big distance between to the Earth's surface. (National Aeronautics and Space Administration, 2009) "When a satellite reaches exactly 42,164 kilometers from the center of the Earth (about 36,000 kilometers from Earth’s surface), it enters a sort of “sweet spot” in which its orbit matches Earth’s rotation. Because the satellite orbits at the same speed that the Earth is turning, the satellite seems to stay in place over a single longitude, though it may drift north to south. This special, high Earth orbit is called geosynchronous." (National Aeronautics and Space Administration, 2009) "A geosynchronous orbit (GEO) is a prograde, low inclination orbit about Earth having a period of 23 hours 56 minutes 4 seconds. A spacecraft in geosynchronous orbit appears to remain above Earth at a constant longitude, although it may seem to wander north and south. The spacecraft returns to the same point in the sky at the same time each day." (National Aeronautics and Space Administration, 2019)


"Three Classes of Orbit". Earth Observatory, National Aeronautics and Space Administration. Last modified September 4, 2009.
Accessed February 13, 2019.

"Basics of Space Flight". NASA Science Solar System Exploration, National Aeronautics and Space Administration. 2019.
Accessed February 13, 2019.