Signature of the industrial contract on 16 June 1999 at Le Bourget for the development of EGNOS. Left is Jean-Claude Husson (President/CEO Alcatel Space Industries) and Antonio Rodotà , ESA Director General. Satellite navigation is currently based on the US GPS and Russian GLONASS military satellite networks. An evolution of those systems, known as the Global Navigation Satellite System (GNSS), will provide an overlay function and supplementary services. Europe's contribution to GNSS-1 is EGNOS [Image Date: 16-06-99] [99.06.006-106]