World In My Eyes

Today GPS (Global Positioning System) is a well known reality that has already become a norm of life for a great number of people. This arrangement gives a possibility to define the position and speed of the objects at any area on Earth, including polar territories, almost in all weather conditions, and in outer space to one hundred kilometers above Earth. The developer of Global Positioning System became the United States Department of Defense that has realized the project.

The basic principle of work is definition of the position by the means of measuring the distance to an object from the point with fixed coordinates. The distance is calculated by the delay time of radio signal spreading from the sending satellite to the receiving of it by a GPS antenna. 3-D coordinates may be detected when GPS receiver will recognize the distance to 3 satellites and the time of the NAVSTAR GPS system. And to detect GPS receiver's coordinates and altitude it must apply minimum 4 satellites' signals. Orbital force supervision is implemented from the principal control station that is situated in Schriever base, Colorado.

GPS receivers are frequently used today by average persons, sailors, rescuers and the police for position and speed detection of diverse objects. You can buy GPS systems in various stores. Today it is often built in mobile telephones, PCs and onboarders. GPS receiver gives you a possibility to detect geographical coordinates of the receiver's location at the present moment of time. The exactness of the position detection is from 3 to 5 meters and when radio signal is improved from Earth it becomes higher and may be to 1 millimeter.

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