Title: Satellite Navigation (SatNav): What is GNSS | GPS | GLONASS | QZSS
Headings: What Is A Satellite Navigation System?
What Is A Satellite Navigation System?
Global Navigation Satellite System (GNSS)
List of satellite navigation systems of various countries
Navigation Message
Receiver Independent Exchange Format (RINEX)
Conclusion

Content: GPS has now become so popular that people mistake every satellite system with GPS, but that is far from the case, as the list below shows! List of satellite navigation systems of various countries
Global Positioning System, popularly known as GPS, is a satellite navigation system of the USA. GPS has been operational since 1978 and provides users with positioning, navigation and timing services. It consists of three seg ments, namely the space segment, control segment, and user segment. Indian Regional Navigation Satellite System (IRNSS), popularly known as NavIc, is an independent regional navigation satellite system developed by India. It is designed mainly for Indian users and provides them with accurate information services about position. It also serves those within a 1500km radius of the Indian Subcontinent. The system started operating on July 1, 2013. Quasi-Zenith Satellite System (QZSS) is a Japanese satellite system that is mainly composed of satellites in the quasi-zenith orbits (QZO). Often referred to as ‘Japanese GPS’, QZSS came into existence on November 1, 2018.