EGNOS or the European Geostationary Navigation Overlay Service is Europe’s first venture into satellite navigation and paves the way for Galileo, Europe’s independent global satellite navigation system. As a satellite-based augmentation system (SBAS), EGNOS improves the accuracy of basic satellite navigation signals in Europe such as those from the USA’s Global Positioning System (GPS). This makes GPS suitable for safety critical applications such as aviation or maritime navigation.

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