GNSS is a global satellite navigation system. GPS is the US GNSS.

A Global Satellite Navigation System (GNSS) is a system that uses satellites to provide autonomous geo-spatial positioning. It allows small electronic receivers to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few metres) using time signals transmitted along a line of sight by radio from satellites (Wikipedia).

GPS is the US GNSS. Other GNSS are used or under construction:

  • GLONASS (ex-USSR countries)
  • Galileo (Europe)
  • BeiDou-2 (China)

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