Introduction
to GPS
The Global Positioning System
(GPS) is a space-based radio-navigation system consisting
of a constellation of satellites and a network of
ground stations used for monitoring and control. A
minimum of 24 GPS satellites orbit the Earth at an
altitude of approximately 11,000 miles, providing
users with means to accurately determine their position,
velocity, and time while anywhere in the world irrespective
of weather conditions.
GPS is operated and maintained
by the Department of Defense (DoD). The Interagency
GPS Executive Board (IGEB) manages GPS, while the
U.S. Coast Guard acts as the civil interface to the
public for GPS matters. The Federal Aviation Administration
continues to investigate and apply GPS as it pertains
to aviation in the United States. In other parts of
the world, this same function is performed by similar
regulatory bodies, often in collaboration with the
FAA.
Next:
How GPS Works
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