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The Data Hub Relays (DHR) of the Copernicus Programme are a network of nodes that facilitate the large-scale transfer of Earth Observation satellite data from ESA’s processing centers to National Mirror Sites and other collaborating locations. Their purpose is to ensure the seamless and rapid delivery of Copernicus data to users, reducing latency and increasing the efficiency of transferring large volumes of data.
Existing Data Hub Relays (DHRs) operate in countries such as the United Kingdom, Austria, Germany, the Czech Republic, and Norway, while in Greece the BEYOND/EAA unit operates the Hellenic Relay Hub, which supports the Hellenic Mirror Site and manages infrastructure for the efficient global distribution of Copernicus data. The hosting infrastructure is provided by the National Infrastructures for Research and Technology (GRNET). The Greek DHR operates seamlessly, achieving nearly 100% availability and serving the registered institutional and individual users. In just one year, more than 650 TiB of satellite data are distributed worldwide.