Galileo Emergency Warning Satellite Service (EWSS) is underway

Source: European Commission (DG DEFIS)

Whether it’s natural or manmade, recurring disasters in our continent highlight the importance of having innovative tools and solutions for resilient risk management and response, with the goal to protect lives and safeguard properties.


In 2015, the United Nations adopted the Sendai Framework for Disaster Risk Reduction. The 5th target within this framework recommends nations to “substantially increase the availability of and access to multi-hazard early warning systems and disaster risk information and assessments to people by 2030”.

With end-users always at the centre of its action, the EU Space Programme continues to evolve, offering services that contribute to the safety and wellbeing of European citizens in line with the political priorities set out by the Von der Leyen Commission. One such service is the upcoming Galileo Early Warning Satellite Service (EWSS), currently under development and testing by the Directorate General for Defence Industry and Space, together with the EU Agency for the Space Programme (EUSPA).


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So, what exactly is the Galileo Early Warning Satellite Service?

EWSS is an upcoming service of the Galileo constellation, which will be disseminating alert messages directly to the population of areas threatened by a looming natural or manmade disaster. More specifically, the Galileo satellites will be transmitting to smartphones, or to any other navigation devices able to receive Galileo signals (through a chipset), information related to the hazard (such as type of hazard, its severity, time of onset and expected duration, the targeted area) and instructions to follow depending on the area the user is located at. The alert content will be generated by national authorities and transmitted to Galileo for broadcast.



The real added value of EWSS

One may wonder why is such a service needed since EU MS already have in place existing alert systems such as cell broadcast, SMS, sirens, internet or even social media?

Indeed, the services comes on top of existing alert systems but, as EWSS Manager at the European Commission, Eric Guyader explains, “for reaching the highest number of people in case of danger, the more alert systems the better. And this new service offers an important advantage: it remains available also when other alert system like mobile networks are congested, disrupted or even destroyed”.

This is particularly useful for people who live remote and rural regions of Europe with poor or no mobile signal at all. It is can also be proved lifesaving when traditional terrestrial alert systems are unavailable due to high traffic, or damage as is regularly the case with earthquake, floods, or fires for example.


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Preparing for the service declaration in 2025

While the service is expected to become operational in 2025 it has already been successfully tested in different sites across the Union. According to the latest tests carried out with several national civil protection agencies, the alert message can be transmitted and received by everyone users located in the danger area, in less than 60 seconds.

Once operational, it will be offered free of charge to national civil protection authorities across the EU27. It will be up to the EU Member States to decide whether they activate it to disseminate their alerts via the Galileo satellites in space.

Together with the Copernicus Emergency Management Service, EWSS will become a strategic asset to support the policies of the European Union and of its Member States in the field of disaster management.


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Ahead of the declaration in 2025, the European Commission together with the EU Agency for the Space Programme published today the Common Alert Message Format Specifications document.

The technical document contains important information regarding the format of the alert message, to be used for encoding (resp. decoding) the alert information into (resp. from) the Galileo signals. The document is useful for EU MS to start implementing EWSS in their national alert systems, for receiver manufacturers to introduce the necessary functionalities in navigation devices, and for any satellite navigation systems willing to broadcast alert messages encapsulated in their satellite navigation signals.

For more information and technical details, you can visit the EUSPA website.



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