• GPS stands for Global Positioning System

 its a satellite navigation system designed to provide accurate position.

its programmed and controled by the us deparment of defense.

Gps works by tramisting locations straight from the satlelites 

• Each satellite broadcasts its orbital position as a modulated signal

• Each satellite contains several very precise atomic clocks • orbit roughly every 12 hours, but they are not geosynchronous.

The system provides critical capabilities to military, civil, and commercial users around the world. The United States government created the system, maintains it, and makes it freely accessible to anyone with a GPS receiver.

Advances in technology and new demands on the existing system have now led to efforts to modernize the GPS and implement the next generation of GPS