Global Monitoring System for EGNOS (GMS)

WAAS+EGNOS Availability Map 13/11/2018

The Global Monitoring System (GMS) provides a wide SBAS performance monitoring using the different GPS/GEO data collection networks. The data files are gathered from public domain ftp sites (such as, and SBAS data sources (, EDAS service) on a daily basis.

The Navigation Solution is computed using gLAB. The automatic processing has a latency of 4 days in order to allow the data to be uploaded to the ftp servers. Also, the inclusion, under request, of additional data sets collected from some independent sites delivered in a ftp server may be added to the processing.



The information/results/statistics contained in this GMS server have not been verified by any official SBAS service provider (e.g., ESSP, FAA) and are offered "as it is," without any warranty that they are accurate, reliable, complete, or up-to-date. 
The use of the GMS website constitutes your acknowledgement of these limitations. 
The GMS results may have errors due to external sources (e.g. missing data in source data servers), the use of not MOPS-certified receivers, or other sources. 
The reproduction, publication, or dissemination of any plot/result/statistic from this GMS server, in whole or in part, for any publication must clearly acknowledge the GMS source and the aforementioned limitation. 

Any official statistic/plot about EGNOS, shall be obtained through ESSP with the email: or website: 

Any official statistic/plot about WAAS, shall be obtained through FAA with the website


Send an email to for requesting access to the GMS.

Link to Global Monitoring System for EGNOS (GMS)