• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Global Positioning Systems (GPS)

A GLOBAL POSITIONING (GPS) system is a radio-based, real-time navigation and positioning system with a global coverage that provides the exact position on the earth surface in almost any meteorological condition. It is formed by three components: satellite constellation, control centers, and a receiver.

There are various Global Navigation Satellite Systems (GNSS): NAVSTAR, GLONASS, and EGNOS, precursor of the European Galileo. However, the system that coined the term and first developed the concept was NAVSTAR (NAVigation Satellite Time and Ranging). It was developed by the Department of Defense of the United States in 1978 and became completely operative in 1994. It was initially conceived for the military, though it was eventually opened for civilian use. Its constellation of 24 satellites, which hold a highly precise atomic ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles