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If the question is regarding finding the latidude and longitude of one point on the earth, the answer is a minimum of three satellites. The method used is called triangulation. If you wish to know the altitude of the point, a minimum of four satellites are needed.

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Q: How many satellites are needed to provide a place on earth?
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Why are many satellites geo stationary?

Because they only need to transmit to certain parts of the planet. TV relay satellites for example - need to stay in one place to beam the pictures back to earth. If they orbited the earth, the signal would be lost as it crossed the horizon. Another example is the global GPS system. The satellites that provide the information for GPS must remain in one place - otherwise they wouldn't give accurate information to the user.


What is a group of satellites that gives out radio signals that record the exact location of every place on earth?

The GPS (Global Positioning System) and GLONASS satellites.


Why where humans needed on earth?

They are not needed at all, the earth would be much better place without them...


How do satellites move?

A Satellite movement behaves in two ways. Its orbit may be defined either as "geosynchronous" or "geostationary". Geosynchronous satellites move together with the Earth's own orbit, so it revolves in the same way as the earth is. Geostationary satellites remain statically in place for a certain coordinate...


An application of coordinate geometry?

by using coordinate geometry you can find the position of a place in earth by using the pictures taken by satellites.


How does satellites avoid collision?

The vast majority of satellites are in geo-stationary orbits. This means, they travel around the Earth at the same speed that the Earth rotates - making them appear in the same place. One example is the GPS satellite network. Other satellites that actually orbit around the Earth, are at a different altitude - so they would (thoretically) never collide with a stationary one. Those that are orbiting, are placed in such a way, that they also avoid each other.


What do geosationary satellites do?

Stay above the same place on Earth "forever" ... thus they stay in the same place in our sky.


What is the inclination of a satellite to the earths equator?

There is no set inclination of a satellites orbit to the earth's equator. Once in space, the spin of the earth or where it's poles happen to be become irrelevant to the satellite. Many satellites like spy and weather satellites orbit over the two poles (north and south) while communication satellites are placed in orbit directly above the equator at a height that is synchronised with the earth's orbit. This way they stay permanently above the same place on the equator and do not APPEAR to move at all.


Jehovah's witnesses-1993 where did this take place?

More details are needed to provide an answer to this question.


What kind of orbit are observation satellites usually placed in?

You mean Earth observation satellites, and the answer is near-Polar low-Earth orbits. This means that as the satellite orbits from above one pole to the other, the Earth turns beneath it, and the satellite passes over the Equator, and every other point on its orbit, at a different place on each successive orbit. In this way, after enough orbits, it can view the whole Earth. Earth observation satellites are placed in low-Earth orbit because (a) they travel faster over the ground at lower altitude and (b) being closer to the ground, their telescopes do not need to be so powerful to achieve a given spatial resolution. Military observation, or spy, satellites, are often placed in a high parking orbit until they are needed, whereupon they are placed into a highly elliptical orbit to allow them to come very close to Earth (and hence see it with great detail) over the region of interest.


What is SATCOM?

Satellite communications. The use of satellites in orbit around the earth to relay data/voice from one place to the other. That's as basic of a definition as I can give you.


What keeps a satellites in place?

Inertia and gravity