Communications Satellite
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Most planes have VHF radios. Military planes have UHF radios, and some planes have satellite communications.
In cellphones, communications takes place via radio waves to a satellite, or via an underground cable network.
Satellite communications. Installation operators will pay a large fee for a set bandwidth to be shared between the crew for email, internet access, telephone and sometimes television, but the latter can be direct from a satellite television provider.
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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.
The orbit of a satellite is determined based on the functions that the satellite needs to perform. A communications satellite.s purpose is to make communications easier. If it were in a very low orbit, the satellite would pass quickly overhead and you would only have a couple of moments to talk. A photo satellite needs to have a low orbit, to be close enough to take good pictures. Photo satellites are often in polar orbits to allow them to cover the entire globe rather than the same parts over and over again.
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.
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equatorial orbit
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.
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A GPS satellite's orbit type is typically a medium Earth orbit (MEO) at an altitude of around 20,000 kilometers. This orbit allows the satellite to provide accurate positioning information to users on the ground while maintaining a good balance between coverage and signal strength.
In an age of geocentric satellites, the moon's orbit would preclude its reliability. However, the moon was used as a type of 'communications sat' back in the 50s, and modern-day satellites grew from that program. See link.
The orbit helps the satellite go into orbit.
Yes, the satellites orbit in a geosynchronous orbit, as with most all communications satellites. (Some exceptions are satellites such as the global positioning satellites.)