Greece has begun utilizing a new fleet of thermal satellites to enhance its ability to detect and manage wildfires, which have increasingly threatened regions near Athens and on popular Greek island resorts. The Hellenic Fire System, consisting of four compact satellites equipped with thermal sensors, transmitted its initial images to Earth in June and is expected to be fully operational by September. Firefighting teams are currently undergoing training to effectively interpret and use the satellite data.

Developed collaboratively by the Hellenic Space Centre and the German satellite company OroraTech, the constellation is designed to provide more frequent and precise monitoring of heat sources associated with wildfires. The satellites orbit at low altitudes and pass over the same locations multiple times, enabling the system to detect heat signatures as small as 4 by 4 meters. This capability allows for earlier detection of emerging fires compared to traditional satellite imagery.

Unlike previous satellite systems, which typically served broader observation purposes and operated with longer revisit times, the Hellenic Fire System is purpose-built for wildfire detection. The satellites process imaging data onboard, filter out false alarms by analyzing heat signals in context with geographical and fire intensity information, and then transmit verified alerts to authorities on the ground. This approach aims to provide firefighters with more timely and actionable intelligence, particularly in conditions where smoke may impair visibility.

Experts note that the constellation's design overcomes the usual trade-off between revisit frequency and resolution. By operating as a coordinated group, the satellites maintain near-continuous coverage of Greece, ensuring that as one satellite moves out of a given area’s view, another enters it. This arrangement significantly improves the chances of detecting smaller fires early and monitoring their progression more closely.

The deployment also represents a shift toward giving Greece direct control over its wildfire surveillance capabilities, reducing dependence on international satellite data. OroraTech had launched an eight-satellite global constellation in the previous year, but the new satellites are tailored specifically to Greece’s geographic needs and wildfire risks.

While the technology holds promise, authorities acknowledge challenges in integrating the new data streams into existing firefighting protocols. “The fire brigade is used to the technology they were using before, so now we have to train them on how to process the new kinds of data,” said Dimitris Bliziotis, Earth Observation programme manager at the Hellenic Space Centre.

The system’s enhanced thermal imaging, which can detect heat through smoke, could transform wildfire management by enabling automated detection without relying on initial human reports. According to Ioannis Lantcuris, OroraTech’s head of operations in Greece, this shift has the potential to accelerate response times and improve firefighting outcomes in an era marked by increasingly severe wildfire threats linked to climate change.