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On behalf of the International Civil Aviation Organization (ICAO), we have developed and operate SADIS.

SADIS - Secure Aviation Data Information Service (formerly Satellite Distribution System for Information Relating to Air Navigation).

These pages provide general information on the SADIS. Currently the acronym refers to Satellite Distribution System for Information Relating to Air Navigation. With the impending cessation of the satellite component of the service (SADIS 2G - see Important News item below), the acronym will refer to Secure Aviation Data Information Service with effect from 1 August 2016. A refresh of the SADIS webpages is planned for coming months, and in the meantime information relating to both services (SADIS 2G and Secure SADIS FTP) will continue to be provided.

What is SADIS?

SADIS is a high quality and cost-effective satellite data distribution system that brings vital flight information to aviation users around the world. It provides a point to multi-point service, via satellite in real-time, on a 24-hour basis. 

  • Uses an Intelsat 904 satellite located over the Indian Ocean

  • Distributes World Area Forecast System (WAFS) products and global OPMET

  • Enables WAFC London to distribute data to more than 90 ICAO contracting states

  • Has coverage of around 60% of the Earth's land surface

  • Access to the internet-based SADIS FTP Service

  • Highly cost-effective

The SADIS satellite uplink facility is located at the Cable & Wireless Communications hub at Whitehill Earth Station, near Oxford, UK.

The SADIS Gateway for OPMET is located at the National Air Traffic Services (NATS) Civil Aviation Communication Centre (CACC) at Swanwick, near Southampton, UK

Learn more about SADIS


The SADIS 2G service, launched in September 2004, offers all approved SADIS users a satellite source of WAFS and OPMET data.

Further details about SADIS 2G

Important News:
The SADIS 2G Service will be withdrawn on 31 July 2016. All current users of SADIS 2G, who do not yet have access to Secure SADIS FTP are strongly encouraged to make preparations to migrate from SADIS 2G to Secure SADIS FTP at the earliest opportunity. Please contact the SADIS Manager, for further information regarding the reasons behind the withdrawal of SADIS 2G, and how to obtain access to Secure SADIS FTP.


The Secure SADIS FTP service, launched on 18 November 2010, offers all approved SADIS users an alternative internet-based source of WAFS and OPMET data. This service is also available (with restrictions) to approved users of the USA Administered WAFS Internet File Service (WIFS). 

Further details about Secure SADIS FTP

Problems or queries?

If you have any problems or queries, let us know using our feedback form or view our SADIS operational admin messages.

Last updated: 22 March 2016

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