what is High Earth orbit satellite
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High Earth Orbit
▪︎High Earth Orbit is when a satellite reaches exactly 42,164 kilometres from the centre of the Earth (about 36,000 kilometres from Earth’s surface).
▪︎At this altitude, the satellite enters a sort of “sweet spot” in which its orbit matches Earth’s rotation. This special, high Earth orbit is called geosynchronous.
•A satellite in a circular geosynchronous orbit directly over the equator (eccentricity and inclination at zero) will have a geostationary orbit that does not move at all relative to the ground.
•This is because the satellite orbits at the same speed that the Earth is turning, it is always directly over the same place on the Earth’s surface.
▪︎Use of a geostationary orbit is extremely valuable for weather monitoring and communication (phones, television, radio) because satellites in this orbit provide a constant view of the same surface.
▪︎Finally, many high Earth-orbiting satellites monitor solar activity, track magnetic and radiation levels in space around them