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European geostationary Navigation Overlay System (EGNOS) European
Currently in the testing phase the EGNOS system is a joint project of the European Space Agency (ESA), the European Commission (EC), Eurocontrol, and the European Organisation for the Safety of Air Navigation.
The EGNOS System Test Bed (ESTB) is currently underway and is expected to produce a fully operation EGNOS system by 2004.