GPS is the Global Positioning System navigation equipment that is used to determine the position at any time and anywhere by using satellites. Function of the GPS satellites which are always / continuously send or emit code information used to know / identify the location on the earth.
Segments of the GPS:
space segment, user segment, and control segment.
Consists of 24 satellites (21 active and 3 as a backup), each of which is the orbit distance with 11,000 miles above the surface of the earth.
Consists of tools recipient GPS signals from satellites.
Control segment of the earth from the station that serves as a checker to ensure that the GPS satellites to work properly. Examples in everyday life, used to know the search for the presence / position of someone, help in finding the existence of a car on the highway, to know the position of the aircraft, to know the speed of an object, and so forth.