There are **several different GNSS**, but GNSS is often confused with GPS (the American GNSS), which is the best known GNSS today. However, there are also **GLONASS, Galileo, Beidou**. **IRNSS** and **QZSS** are regional satellite positioning systems. In GeolocPVT, we use **Galileo, GPS** and **Beidou.**
