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Primer On How GPS Works

Posted by: Chris Steins
Thanks to: Chris Steins
5 June 2002 - 11:00am

Scientific American provides a fascinating introduction to how GPS devices work.

"The Global Positioning System (GPS) consists of 24 operating satellites and several spares. Some of these spare satellites are also in use or can readily be activated once an operating satellite becomes dysfunctional. Taking the specific orbits of this many satellites into consideration, an observer can see at least four satellites at any time from any location on the earth."

Full Story: How do GPS devices work?
Source: Scientific American, June 3, 2002
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