GPS and other GNSS

Global Navigation Satellite Systems - GNSS - is a collective name for satellite-based navigation and positioning systems.

The GNSS that have global coverage are the U.S. Global Positioning System (GPS), the Russian Globalnaya Navigatsionnaya Sputnikovaya Sistema (Glonass), the European Galileo and the Chinese Beidou.

In addition, there are a couple of regional systems.

GPS, GLONASS, Galileo and BeiDou are designed to guarantee free access to signals from at least four satellites of the system, regardless of your location on Earth. Usually there are significantly more satellites available. In many applications it is an advantage that the GNSS receiver can combine measurement with several systems simultaneously.

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