GPS (Global Positioning System)

 

Definition: A Global Positioning System is a satellite-based radio navigation system run by the U.S. Department of Defense.

What This Means: Signals from at least four satellites on the horizon at all times are sufficient to compute the current latitude, longitude, and elevation of a GPS receiver anywhere on earth to within a few meters. GPS coordinates are used to locate school buildings and other facilities for emergency plans. Bus routes, school boundaries, and geography lessons use GPS data.

 

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