If an artificial satellite can be positioned so that its orbit is exactly circular, and exactly over the equator, and takes exactly one sidereal day to orbit the earth, then an observer on the earth sees the satellite hang perfectly motionless in the sky. This is a big help when you want to receive radio or TV from the satellite, and you're using a high-gain 'dish' antenna that has to stay pointed at the satellite. If the satellite moved in the sky, then you would need some complicated machinery to keep it always pointed in the right direction. But if the satellite appears motionless in the sky, then your dish never has to move ... just set it once and forget it. If the popular TV satellites moved in the sky, there's no way that all those little dishes on the houses could be equipped to track the satellite and still be economically feasible.
If that translates as a geosynchronous satellite, then yes it is useful. This is a satellite which, once attaining high orbit, its speed is synchronized to the speed of the earth's orbit. This permits the satellite to remain in the same stationary position over a given portion of the earth's surface. These types of satellites are useful for communications such as weather and television etc. as there is no loss of signal. At least, that's the idea if one discounts a snowstorm or heavy rain and the tv goes out.
The most likely factor that would cause a communications satellite orbiting Earth to return to Earth from its orbit would be atmospheric drag. As the satellite moves through the Earth's atmosphere, it experiences friction with air molecules which can slow it down and cause its orbit to decay, eventually leading to re-entry into Earth's atmosphere.
Satellite phones work by connecting directly to a communications satellite in orbit, which then routes the call to a standard phone network. Because the satellites are in orbit the phone can work anywhere on earth.
They take 24 hours to orbit earth so they will always be in the same place in the sky. This makes it easier for setting up satellite dishes for example, since they have to be pointed toward the satellite.
A Geostationary orbit - it means that the satellite will always stay above the same point on Earth. Hope that helps
Geo
A satellite in orbit around Earth acts as a communications relay, collects data for research, monitors weather patterns, and provides navigation services.
As a noun: The rocket placed the satellite into a high Earth orbit. As a verb: The satellite had to travel very fast to orbit the Earth.
orbit
The only natural satellite that orbits the Earth is the Moon.
The plane of a satellite's orbit must include the center of the earth.
no, the moon is the Earths natural satellite, the moon is in orbit around the Earth. The whole Earth/Moon system is then in orbit around the sun.