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GPS

An Investigation Into Global Positioning System

There is coming a day when we will no longer need a map or directions. A

computer screen in our cars will tell us what direction, what street and the shortest way to

get somewhere. It will make delivery businesses more efficient and will keep track of the

delivery trucks. It will guide ambulances and fire-trucks to their destinations quicker.

Here is a look at this computer system called, Global Positioning System.

Global Positioning System, or G.P.S. is an extensive geographic coverage of

earth, 24 hours a day, with exceptional accuracy. G.P.S. allows every square inch on the

earth's surface to have a unique address in latitude and longitude ("Basics"). G.P.S.

permits land, sea, and airborne users to determine their three-dimensional position,

velocity, and time (Reece). G.P.S. can be used for vehicle navigation, surveying,

emergency services, aviation, precise positioning, agriculture, photogrammetry,

recreation, and many more ("Basics"). So any time you taking a plane trip, you are


the military (Reece). The Global Positioning System does have blind spots though, such

control stations, causing the receiver to not pinpoint its exact position (Lake G5).

Currently there are 27 operational G.P.S. satellites orbiting earth. It takes each satellite

Each G.P.S. satellite is equipped with a extremely precise atomic clock (Reece). G.P.S.

Differential Global Positioning System can be accurate within less then a meter,

about 12 hours to orbit the earth. The control segment is a group of ground stations that

Reece, Mary E. "G.P.S. History." Global Positioning System. April 2000. 26 Apr

math equation: Distance is equal to the speed of travel multiplied by the time (Lake G5).

units are usually combined with chart-plotting, sonar, and fish-finding technologies."

location based on signals from the satellites (Reece). G.P.S. uses a basic high-school

is very precise, and can be thrown off by a nanosecond (0.000000001 of a second)



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Approximate Word count = 718
Approximate Pages = 3 (250 words per page double spaced)


  

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