The EPS-Sterna programme will complement EUMETSAT’s existing fleet of geostationary and polar-orbiting satellites and strengthen space-based observations for weather forecasting and climate monitoring. It is fully funded by EUMETSAT’s 30 member states.

The innovative “New Space” constellation of 20 micro-satellites will improve microwave sounding coverage globally and help close important observation gaps in the Arctic. Microwave sounding instruments form the most important source of observation for numerical weather prediction. The first six satellites are expected to be launched in 2029. Over the course of the mission’s planned 13-year lifetime, EPS-Sterna data are projected to generate more than €30 billion in value for Europe, with a benefit–cost ratio of up to 51:1, helping national weather services improve forecasts and enabling decisions that protect lives, infrastructure and economic activity.

“EPS-Sterna strengthens our ability to anticipate risks, protect citizens and support resilient economies, while demonstrating what we can achieve together through cooperation across Europe” said Phil Evans, Director-General of EUMETSAT. “The signature of the contract with OHB Sweden today marks the start of EPS-Sterna satellite development: it is an important milestone for Europe’s space-based observing system that will also open unique opportunities to develop cooperation with international partners, such as the United States, China and India, in support of the World Meteorological Organization’s Global Observing System.”

Under the terms of the programme, the EPS-Sterna satellites will be procured by ESA on behalf of EUMETSAT, with OHB Sweden serving as prime contractor for the space segment. EUMETSAT, as the system authority, will also develop the ground segment, procure and provide the launch services, operate the satellites, manage the constellation and distribute the data through its data distribution mechanisms, including EUMETCast and EUMETView.