GNSS (Global Navigation Satellite System) describes the various satellite constellations used around the world such as GPS, GLONASS and Galileo. GNSS receivers use signals from multiple satellites in any of these constellations and use trilateration for pinpoint accuracy. GPS (Global Positioning System) refers to a specific type of GNSS which was developed in the 1990s as the world’s first satellite constellation for navigation. GPS receivers use satellites that are from that specific constellation rather than others like with GNSS.
GNSS/GPS modules are used in navigation, positioning and timing applications such as personal navigation and asset tracking due to their precise locational properties. Through transmissions received from multiple satellites GNSS/GPS offers reliable reception in locations all over the world. Understanding how GNSS/GPS modules are integrated and perform is paramount to choosing the right module for specific applications.