The geostationary orbit is also called "geostationary orbit". Special orbit with inclination of 0 in geosynchronous orbit. The satellite is relatively static with the ground and fixed above the equator. The forward circular orbit is 35786 kilometers from the ground. A satellite can cover about 40% of the earth's area. Meteorological satellites, communication satellites and broadcasting satellites often use this orbit.

Sir Arthur C. Arthur Clark's most famous prediction for the future is his proposal for geostationary satellite communication published in Wireless World magazine 1945.

1in February, 945, he pointed out in a short article that a rocket with a speed of 28,000 kilometers per hour can revolve around the earth. Clark also knows that the higher the orbit of a satellite, the slower it moves. At an altitude of less than 36,000 kilometers, it takes as long to make a circle as the earth does.

If the satellite is just above the equator, it will rotate precisely with the earth, and the satellite is always above the same point on the earth's surface. As experts say, this kind of satellite is stationary relative to the earth.

75 years ago, Arthur Clark wrote another paper, in which he put forward the suggestion of using satellites for earth radio communication. If there are three satellites in the geostationary orbit with a distance of 120 degrees, they can cover almost the whole earth-then you can communicate anywhere through satellites. Twenty years later, 1965, Intelsat- 1 became the first satellite to reach orbit.

Arthur Clark witnessed the victory of his idea. When he died at the age of 90 in 2008, there were more than 300 satellites in the geostationary orbit.