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14/02/1989 First GPS satellite is launched

7:42

Why The US Military Made GPS Free-To-Use

7:03

GPS History and basic knowledge

4:20

A brief history of GPS (from CNN)

In 1983 a Korean Boeing 747 was shot down by Russian Su-15 fighter. The airliner flew inside military airspace due the navigation error. American president Ronald Reagan decided to make U. S. military satellite navigation system freely available for civilian use. First of the 24 GPS satellites was launched six years later.