05. Where in space do satellites orbit? Do their signals interfere with each other? (A K2S Question)

From The Space Library

Communications and TV-broadcasting satellites generally orbit at 22,300 miles, which is called the geostationary orbit. This is because at this altitude, the satellites take exactly a day to get around the Earth and back again, and therefore they seem to be stationary the whole time above the same point on the Earth's equator—because, meanwhile, the Earth spins around once a day too! Other kinds of satellites can orbit as low as about 150 miles, and others operate at intermediate altitudes. An organization in Geneva, Switzerland, called the International Telecommunications Union (ITU), makes sure that there is no interference in their signals.

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Answer provided by Derek Webber

Question and Answer extracted from the book Kids to Space - by Lonnie Schorer

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