Description

The European Geostationary Navigation Overlay Service (European Geostationary Navigation Overlay Service (EGNOS)), is a satellite-based augmentation system (SBAS), providing both correction and integrity information about the Global Positioning System (GPS) system, delivering opportunities for Europeans to use the more accurate positioning data for improving existing services or developing a wide range of new services.

EGNOS uses a ground-based monitoring network to enable corrections to the Global Positioning System (GPS) signals to be calculated and broadcast by Geo-Stationary satellites. This will correct for errors caused by the ionosphere or errors in the broadcast signal itself enabling higher accuracy and improved integrity monitoring when compared with GPS alone.