Look to the Stars: Satellites and the Future for Emergency Communication
- January 4, 2024
- Categories: Public warning
In 2022, the Emergency Event Database EM-DAT recorded 387 natural hazards and disasters worldwide, resulting in the loss of 30,704 lives and affecting 185 million individuals. Economic losses totalled around 210 billion EUR. Without a doubt, the question of how this loss of life and financial cost can be mitigated is one at the top of national government’s priorities.
It has already been proven that early warning systems significantly reduce the cost, and human loss of life, caused by natural hazards and disasters. Early warning systems are an integration of hazard monitoring, forecasting and prediction, disaster risk assessment, communication and preparedness activities systems and processes that enables both citizens and governments to take timely action in the case of a natural disaster. In the United Nations Office for Disaster Risk Reduction’s (UNDRR) 2022 Global Status Report, the statistics spoke for themselves: countries with substantive-to-comprehensive early warnings coverage have disaster mortality eight times lower than countries with limited coverage. The Global Commission on Adaptation highlighted the economic value in such systems: investing 750 million EUR in developing countries’ early warning systems now would prevent losses of up to 15 billion EUR annually.
Before mobile phones became so widespread, many early warning systems were comprised of sirens (and still are in many cases). The most prominent benefit of these is that the calling is universal: regardless of language or if you possess a mobile phone, as long as you are in the area, you are likely to hear it. However, this also comes with limitations. Sirens require the pre-training of citizens to know what to do when the siren sounds, as instructions cannot be given. In the case of the 2023 Maui wildfires, this posed a problem. Maui Emergency Management Agency Administrator Herman Andaya made the decision not to sound the sirens during the fatal wildfires because of this. His decision was based on how citizens in Hawaii are trained to head to high ground when they hear the siren, as typically, they are used for tsunamis. With the wildfires coming directly from the higher ground (the mountainside), this would have led citizens directly into danger.
With 95 per cent of the world’s population having access to mobile broadband networks and nearly 75 per cent owning a mobile phone, mobile networks are incredibly powerful communications channels. Mobile-based public warning systems offer the ability to send a personalised message, giving citizens a certain amount of information that is vital to the situation. There are slight differences between the two most commonly used technologies, cell broadcast and location-based SMS, but EENA believes that using both technologies is the best solution to fully exploit their potential and making sure that citizens are appropriately informed of a developing disaster. With them, customisable messages can be sent to millions of phones in less than 10 seconds.
But there is a growing problem that can render both sirens and traditional telecommunication methods ineffective: when the natural disaster destroys the physical infrastructure. A siren does not work if an earthquake, for example, has destroyed it. Similarly, messages cannot be broadcast by cell tower if those cell towers have been destroyed too. This is believed by many to be the case in Maui, where power and mobile phone service were reported by many to be cut well before any warnings were received. In the 2023 Türkiye/Syria earthquake, 278,000 buildings were collapsed or seriously damaged, with another 450,000 buildings receiving medium or minor damage. At the 2023 EENA Conference, Dr. Turhan Sofuoglu, President of the Emergency Disaster Ambulance Physicians Association of Türkiye, explained that critical infrastructure collapsed as a result of the earthquake. Typically, base stations – which are used for sending calls/messages to and from mobile phones – are based on top of buildings, for the best coverage. 30 percent of the base stations in the earthquake region were instantly and completely disabled, and telephone and internet connections were interrupted as a result of widespread power cuts and fibre lines in the region. This means that while you may have a working phone in your pocket, there is no guarantee you’ll receive the vital information you need in an emergency if the infrastructure that communicates with your phone is down.
So where do we go from there? In short, up. Satellite communications – where satellites in orbit above the earth form the network for transmitting signals – may mitigate some of the problems of traditional telecommunications networks. But how do these satellites actually work? We can focus on Galileo, Europe’s own global navigation satellite system, as an example. The current Galileo system consists of 28 satellites, with 26 in orbit above the earth, 23,222km in altitude (if you are wondering where the other two are, they were launched into the wrong position and as a result, only used for search and rescue). Spread on 3 orbital planes above the Earth, the Galileo satellites broadcast navigation signals all over the globe, including over the poles. The loss of one satellite would have no discernible effect on users of the service. Two Galileo Control Centres, in Italy and Germany respectively, monitor and control the good state of the constellation, by receiving signals from these satellites and sending back corrections and navigation data.
Already, the Galileo service is saving lives through a Search and Rescue (SAR) service. If a ship at sea activates their Emergency Position Indicating Radio Beacon (around 1 million vessels have one), that distress signal can be picked up by the satellite service: useful, as often in the middle of the sea, there is no mobile coverage. The satellite can then relay the position of the vessel back down to ground stations who can initiate a rescue.
Apple’s Emergency SOS service also utilises satellite coverage when you are out of range of traditional cell networks, showing existing commercial interest for emergency satellite communications. If you try to call your local emergency number – whether that is 999, 112, 000, 911 or otherwise – and you have no signal, you will be prompted on certain models of iPhone to use the satellite SOS service. Unlike a traditional emergency call, where you will speak to a dispatcher, you are instead given a series of questions to respond to via your phone interface, followed by a text conversation with an emergency call-taker where your location and previous answers (plus any pre-noted medical information) are transmitted. Already, news reports from around the world have shown this service having saved the lives of hikers, car crash victims, those caught in wildfires and more.
It is easy to see how, with a few developments, satellite service could be an excellent avenue of communication for public warning. An accurate and personalised message to mobile phones, resistant to natural disasters that may take traditional communication networks down. The potential is already being explored in the EU through the Emergency Warning Satellite Service (EWSS): utilising Galileo’s messaging function to transmit an alert to smartphones with instructions to follow depending on the area where a user is located. It is being tested through the STELLAR project, funded by the Horizon Europe programme and managed by the Directorate General for Defence Industry and Space (DEFIS) of the European Commission. The project aims to show the viable potential of using satellites as a method to alert citizens during both natural and manmade disasters through demonstrations that replicate scenarios where satellite service may be more effective than traditional telecommunications networks. The demonstrations conducted by the STELLAR project have been greatly successful, efficiently transmitting distress messages to mobile phones within seconds of activation and within an incredibly accurate area.
The first STELLAR demonstration aimed to replicate the deadly AZF factory explosion that took place in Toulouse in 2001, in which 31 died and 2500 were wounded. In the explosion, approximately 300-400 tonnes of ammonium nitrate exploded, creating a crater 70 metres long and 6 metres deep – with an earthquake of magnitude 3.4 being recorded. The explosion caused significant destruction in the southwestern part of the city, with 2 billion euros of damage caused and approximately 45,000 people requiring evacuation. Two thirds of the city’s windows were shattered.
The STELLAR demonstration aimed to replicate alert messages that citizens would need to receive during such a disaster – avoiding confusion and panic as well as advising citizens on the best course of action depending on their exact area.
Eric Guyader, responsible at European Commission’s DG DEFIS for the definition and development of EWSS and for the STELLAR project, explained that “with EWSS, civil protection authorities can now make use of satellite navigation capacity for broadcasting alert to citizens. Alongside the Copernicus’ Emergency Management Service, EWSS can be seen as a strategic asset to support the policies of the European Union and of its Member States in the field of disaster management”.
What next? Satellite technology is new – much, much newer than traditional telecommunications networks. As a result, we are in the very early stages of harnessing the potential for satellite communications for public warning. But like any new technology, the first innovative uses of it may prove a compelling demonstration for national governments to consider their own usage.
This is not to say that the methods we currently utilise for early warning systems are useless; they have been proven to save countless lives and substantial financial costs. But as the frequency and severity of natural disasters and hazards intensify, we have to find creative solutions to mitigate the challenges we face. And for that, we may just have to look to the stars.
The STELLAR project is executed by a consortium led by Telespazio France, and composed of Thales Alenia Space, CNES, F24 and EENA.
This article was published in the Crisis Response Journal, the global information resource that covers all aspects of human-induced disasters or natural hazards, spanning response, disaster risk reduction, resilience, business continuity and security. You can find the original article here.
Amy Leete
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