1.What is GPS?

Stands for 

Global

Positioning

System

GPS is a satellite navigation system used to determine the ground position of an object. 

2.when was first GPS launched?

he first satellite in the system,Navstar 1,was launched on february 22,1978 by the U.S. Department of Defence.

In 1983,Korean Air flight 007 was shot down by Soviet,after accidentally entering prohibited airspace.

This event created Cold war condition both sides.

3.Facts about GPS

Why is GPS free?

President Reagan announced that GPS would be made available for free for civilians to avoid such preventable disasters in the future.

4.Who pays for GPS?

The american taxpayer pays for the GPS service enjoyed throughout the world.All GPS program funding comes from general U.S. tax revenues.

GPS is operated and maintained by the U.S. Air Force.

5.How much GPS cost?

The initial constellation cost $12 billion to put into orbit.

The operation cost works out to just over $2 million a day.

$750 million dollars a year.

6.What is encrypted GPS?

GPS satellites broadcast two signals.one is available for everyone,and the other is encrypted so that is is accessible only to the Military.

7.How much data GPS take?

It's about 5 MB per hour of driving.

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