EGNOS’ infrastructure comprises a ground network of 39 ranging and integrity monitoring stations (RIMS), six navigation land earth stations (NLES), two mission control centres and signal transponders on three geostationary satellites (two Inmarsat III and IV satellites and one SES ASTRA GEO satellite SES-5). The EGNOS service area includes most European countries.

The European Satellite Services Provider (ESSP) is the EGNOS system operator and service provider. Information on the status and performance of EGNOS and the availability of the geostationary satellites, is supplied at the ESSP User Support Website.

Additional information can be found on the European Space Agency website.

1.2.1 Egnos satellite coverage

EGNOS geo footprint


EGNOS Real Time Performance (ESA).

Open Service

On 1st October 2009, the European Commission declared that EGNOS's basic navigation signal became operationally ready as an open and free service.

EGNOS Open Service provides Europeans with unprecedented positioning precision by improving the accuracy of GPS.

The continuous monitoring of the EGNOS signal shows that it improves the accuracy of GPS to within one to two metres and is available more than 99 percent of the time. By comparison, someone using a GPS receiver that is not EGNOS enabled can only be sure of its position to within 17 metres.

In announcing the availability of the Open Service, the Commission confirms that this level of performance is available for the long term and that the signal can be used without any charges.

Receiver manufacturers and application developers are able to provide their customers with the benefits of the GPS performance improvements simply by adding EGNOS capability to their products. No authorisation or receiver-specific certification is required.

Map of Europe with location of MCCs, RIMSs and NLES.

The EGNOS service area includes all European states.

Safety of Life signal

In addition to the enhanced accuracy provided by the OS, the EGNOS Safety of Life (SoL) service provides the stringent integrity, continuity and availability required to support Civil Aviation applications up to LPV (Localizer Performance with Vertical guidance) operations.

The EGNOS SoL service will also be usable in a wide range of other application domains (e.g. Maritime, Railways, Road…) but, at this stage, a detailed performance characterisation has only been conducted against the requirements expressed by civil aviation. The SoL Service is certified since March 2011.


The EGNOS Data Access Service (EDAS) provided by the ESSP consists of the provision in almost real time of the same data that is broadcast by the EGNOS satellites (EGNOS Message) along with the GPS and Glonass measurements at all the stations of the EGNOS monitoring network (RIMS and NLES).

These data are obtained from the EDAS server through an specific interface software (EDAS Client Software) that is provided to the EDAS user upon registration.