GLOBAL POSITIONING SYSTEM

• Total of 24 satellites make up GPS.
• It wasn't until 1994 did the military have the complete no. of satellites in orbit.
• Satellites can last for only ten years and to be replaced with another one.
• Satellites are powered by solar energy but are equipped by batteries which are only activated during solar eclipse.
• GPS device determines the user's precise location by calculating the time a signal is sent to receiver.
• The whole process takes the time lesser than one second to accomplish.