AAC Clyde Space's Weather Technology Praised by ESA - Supports Future EPS-Sterna Constellation
AAC Clyde Space's technology onboard the European Space Agency's (ESA) Arctic Weather Satellite has received strong praise for its performance, marking an important milestone towards the future EPS-Sterna constellation. The satellite, launched in 2024, carries a cutting-edge microwave radiometer developed by AAC Clyde Space's subsidiary AAC Omnisys in Gothenburg, as well as the spacecraft's "brain" and "heart" - the SIRIUS avionics and STARBUCK power system - both flagship, high-volume products developed and produced at AAC Clyde Space's facility in Uppsala.
The Arctic Weather Satellite (AWS) is a prototype mission designed to demonstrate how high-quality atmospheric data can be delivered quickly and cost-effectively to improve short-term weather forecasting, particularly over the Arctic. ESA has now confirmed that AWS is performing on par with larger, traditional weather missions - a significant validation of the New Space approach and of AAC Clyde Space's advanced technology.
AWS forms the basis for the proposed EPS-Sterna programme, a constellation of Weather Satellites planned by EUMETSAT. The constellation would dramatically improve temporal coverage of microwave weather observations, benefitting both regional and global forecasts. A decision on the programme is expected in the second half of 2025.
ESA and leading European meteorological institutions have confirmed the performance of the AWS radiometer, including its novel 325 GHz sounding channel - a frequency never before used for operational weather forecasting. The data have already shown measurable benefits for short-term forecasting, especially in Arctic regions where weather can change rapidly.
“We are proud to see our advanced technology helping shape the future of weather forecasting. This recognition from ESA reinforces our position at the forefront of space-based weather intelligence,” says Luis Gomes, CEO of AAC Clyde Space.
In February 2025, AAC Clyde Space announced that it had received an order from OHB Sweden to procure key instrument components for the EPS-Sterna programme. These long lead-time components will be delivered by the end of 2025, with a total order value of EUR 1.0 million (approx. SEK 11.8 million). The procurement is part of a risk mitigation measure by EUMETSAT to ensure timely deployment of the initial constellation.