GPS (Global Positioning System) be devided in three segments
1. Control Segment
Is the core of the GPS system that is satellite control stations are always doing the monitor to know the exact position, altitude, and speed of the satellite. The information was information was sent back to the satellite, and satellite will transmit information to receivers on earth. This control station operated by the United States Department of Defense.
2. Space Segment
The composition of the GPS satellites that transmit signals to earth, now there are 24 satellites NAVSTAR (Navigation Satellite for Time and Ranging) that orbited the earth and used for GPS.
3. User Segment
GPS signals from satellites used by the user on Earth to perform calculations in order to position a variety of purposes.
