BeiDou: China's GPS Challenger Takes Its Place on the World …
GNSS were created almost 50 years ago when U.S. scientists pioneered a global positioning system (GPS). Today, four countries operate GNSS: the United States has GPS, Russia has GLObal NAvigation Satellite System (GLONASS), the European Union (EU) has Galileo, and China has the BeiDou Navigation Satellite System, usually …