For centuries and centuries, man has all been about following nature and her intended course. Navigators knew how to read the stars to chart their courses in the sea. Hitchhikers had found themselves led outside a deep forest thanks to moss that always grows north and the river that guides them to a town. Although all of these are reliable, they are not really that accurate. The GPS system has given numbers to locations uncharted.
Receivers use a special mathematical principle called trilateration. It is used to calculate the location of a receiver accurately by the maters in coordinates. Trilateration uses three distinct spheres (ergo the satellites) and by determining the scope of these three spheres, the intersection of these spheres is usually where you are located. This intersection is then measured from the center of the spheres (ergo their radiis).
The operation requires three distinctly positioned circles, which are all represented by the three satellites that return the signal to the receiver. When the receiver sends a request to the nearest satellite, it returns a positional coordinate and a time stamp. This location is the center of that sphere. How far you are from center of the sphere is determined by the time lag it takes for the satellite's signal to arrive to your receiver. The time stamp and the time it takes to arrive to your receiver is used to calculate your own distance from the location of the satellite in terms of geography.
In example, satellite A returns with an estimated 600 miles from the center. Satellite B returns with 400 miles from the center. With two satellites, you'd know that you are between two towns with a distance of 600 and 400 from each. You need to have the third sphere in order to have dimension from your distance. Are you parallel from the towns? Perpendicular?
As A and B determines the height, C will determine the width. This gives a clearer picture as to where you are located right now. Constant movement reflects upon the streamed data from the satellite and you'd immediately get an update from where you're going. 3 coordinates make up the x and y coordinates made only possible by an eye in the sky.
Receivers use a special mathematical principle called trilateration. It is used to calculate the location of a receiver accurately by the maters in coordinates. Trilateration uses three distinct spheres (ergo the satellites) and by determining the scope of these three spheres, the intersection of these spheres is usually where you are located. This intersection is then measured from the center of the spheres (ergo their radiis).
The operation requires three distinctly positioned circles, which are all represented by the three satellites that return the signal to the receiver. When the receiver sends a request to the nearest satellite, it returns a positional coordinate and a time stamp. This location is the center of that sphere. How far you are from center of the sphere is determined by the time lag it takes for the satellite's signal to arrive to your receiver. The time stamp and the time it takes to arrive to your receiver is used to calculate your own distance from the location of the satellite in terms of geography.
In example, satellite A returns with an estimated 600 miles from the center. Satellite B returns with 400 miles from the center. With two satellites, you'd know that you are between two towns with a distance of 600 and 400 from each. You need to have the third sphere in order to have dimension from your distance. Are you parallel from the towns? Perpendicular?
As A and B determines the height, C will determine the width. This gives a clearer picture as to where you are located right now. Constant movement reflects upon the streamed data from the satellite and you'd immediately get an update from where you're going. 3 coordinates make up the x and y coordinates made only possible by an eye in the sky.
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