There are four global positioning and navigation systems

The existing global satellite navigation and positioning systems are the United States of America's Global Positioning System (GPS) and Russia's Global Positioning System (Globle Naviga2tion Satellite System), referred to as GLONASS, as well as China's Beidouxing and Europe's Galileo.

1. China Beidouxing BDNS

2. Russian GLONASS system

3. American GPS system

4.European Galileo GALILEO