EGNOS and Galileo - European GNSS Agency - Europa

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18EGNOS – A boost to satellitenavigation in EuropeBy correcting errorssuch as those linked toionospheric disturbances, SBAS, likethe European Geostationary NavigationOverlay Service (EGNOS), make informationreceived from GNSS systems like Galileo andGPS even more accurate.GNSS systems alone do not meet the necessaryoperational requirements set by the civil aviationauthorities and the improved accuracy is alsobeneficial to all other uses of GNSS systems.As they are interoperable, SBAS systemshelp provide continuous coverageacross the globe.WAASEGNOSSDCMGAGANThe European Geostationary NavigationOverlay Service (EGNOS) covers Europe and beyond.MSASThe USA uses the Wide Area Augmentation System (WAAS).Japan is covered by its Multi-functional SatelliteAugmentation System (MSAS).India also has its own SBAS, GAGAN, which coversthe Indian subcontinent.Also active in the field, covering the Russian Federation, is the RussianGLONASS System of Differential Correction & Monitoring – SDCM.All the SBAS are interoperable, so with the same receiver, users can benefitfrom augmentation of satellite navigation everywhere in the world.
19Why we need a European boostto satellite navigationOnce fully established, improvements to the accuracy of satellite information willopen up GPS and Galileo to a wider range of uses and applications.Three services are provided by EGNOS:Open ServiceLaunched in October 2009,this is offered for free toanyone with a receivercompatible with satellitebasedaugmentationsystems.Safety-of-lifeServiceThis service was launched inMarch 2011 for civilaviation, providing anindispensable warning tousers within six seconds inthe case of a GPS (and soonGalileo) malfunction. Whenlives are potentially at stakesuch as in aviation, thiswarning is essential.Commercial ServiceAll the information collectedand generated by EGNOS isalso available through aground network, meaningthat in situations wheresatellite signals are blockedor disturbed, the informationcan still be accessed. This isespecially relevant in densecities where tall buildingscan block GPS signals.
Page 2: Europe Direct is a service to help
Page 5: 5ForewordSteering by the stars - 21
Page 11 and 12: 11What services will Galileo offer
Page 13 and 14: 13Civil engineeringThis is one doma
Page 15 and 16: 15Up and running in two phases1. 2.
Page 17: 17Where can we see the difference?A

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