Since its certification for civil aviation in 2011, EGNOS the European geostationary navigation overlay service has gone from strings to strings. EGNOS is a satellite-based augmentation system that improves GNSS positioning, using three satellites and a network of more than 40 reference stations in 24 countries. providing much greater accuracy than achieved through GPS alone. EGNOS added LPV 200 service. pilots rely on instruments for most of their approach, however in the final stages of the landing procedure they have to decide whether it’s safe to land based on what they can see. the additional accuracy of the EGNOS LPV 200 service lowers the altitude at which the pilot has to make that decision to only 200 feet above the runway.
EGNOS reduces risks associated with landing and bad weather, increases accessibility to airports, reduces delays, diversions and cancellations, by increasing airspace capacity and lowering both air traffic control and pilot workload. EGNOS improves safety and increases efficiency of operations whilst lowering fuel consumption, co2 emissions and noise levels. the service requires no upgrade to an airports ground infrastructure or to existing certified EGNOS recivers and offers the same decision height as ILS cat1. the European GNSS agency has worked continuously with aircraft manufacturers, airspace users, aviation authorities and airports to help integrate and adopt EGNOS. As of October 2015, 271 EGNOS based procedures in 157 airports have been developed and every month more airports are adopting EGNOS.