a worldwide position, velocity, and time determination system, that includes one or more satellite constellations, receivers, and system integrity monitoring, augmented as necessary to support the required navigation performance for the actual phase of operation
Hea teada
Four implementations of GNSS are currently in existence or under development. These are:USA: Global Positioning System (GPS); European Union: GALILEO; Russia: Global Orbiting Navigation System (GLONASS); China: BeiDou Navigation Satellite System (BDS).
