Are you one of those people who would rather drive around town for hours than stop and ask for directions? If so, a Global positioning system, or GPS, could be the perfect tool for you.
A GPS is an operational navigational system that employs the use of navigational satellites. In other words, it tracks an individual’s location or provides direction, all by using an existing satellite system. GPS units are also capable of providing real time reference on earth, or within its orbit.
The satellite navigation system was implemented and first used by the United States of America’s Department of the Defense. Later, the system was adopted for use by other countries including Europe (Galileo) and Russia (GLONASS). In the United States, any US citizen may use the navigational system, free of charge.
The satellite navigational system is primarily divided into three segments:
* Space: As the name suggests, the space segment works from outer space. It operates through a GPS satellite constellation, located in an Intermediate Circular Orbit.
* Control: The control segment of a satellite navigational system is comprised entirely of control...
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