To better understand the earth, the European Space Agency (ESA) has selected three scientific concept candidates to progress towards its twelfth Earth Explorer mission. They are, ranked in order ECO, Keystone and CryoRad.

The decision – taken by the Programme Board for Earth Observation (PBEO) – means that these three will move forward to the next stage of development and one will be selected before the next ESA Council at Ministerial level for implementation as Earth Explorer 12 and launch around 2026

Three missions, three future information markets

ECO would address Earth’s energy imbalance, a fundamental measure of how much energy the planet retains. Better evidence on that balance could strengthen climate modelling and provide more dependable context for climate-risk, adaptation and policy services.

Keystone would observe atomic oxygen, temperature, wind and other atmospheric constituents between 50 km and 250 km altitude. Alongside its atmospheric science, ESA notes that it could detect metal from space debris re-entering the atmosphere, an increasingly relevant issue as orbital activity grows.

CryoRad would measure temperatures and basal conditions inside polar ice sheets. Those observations could improve understanding of ice-sheet dynamics and future sea-level change, supporting the long-term evidence base for coastal planning, infrastructure investment and insurance.

Can this help commercial EO companies?

Earth Explorer missions are scientific not commercial constellations and as such, their value is not measured only at launch. They create demand through the full mission lifecycle: sensor research, calibration and validation, ground-segment capability, specialist processing and the downstream services that turn complex observations into decisions.

For UK and European businesses the important question is not which of the three concepts wins in the end. It is where commercial expertise can help make the mission usable, reliable and valuable to organisations that need better evidence on climate, polar change and the changing upper atmosphere.

There is also a wider lesson. Long-term public EO programmes give industry a clearer technical direction and help sustain the skills, supply chains and user communities needed to translate science missions into operational capability. The commercial opportunity grows when missions are designed with data access, interoperability and downstream use in mind from the start.

A decision for 2036 that starts work now

The eventual launch is still around a decade away, so this is not an immediate procurement notice or a near-term revenue promise. But ESA’s selection provides a credible early indicator of where European EO investment and technical collaboration may be heading.

For BARSC members, it is a reminder that commercial support for EO begins long before a satellite reaches orbit. The companies best placed to benefit will be those that can connect future measurements to real customer needs in climate resilience, infrastructure, insurance and environmental decision-making.

Source: European Space Agency, “Three Earth Explorer candidates go forward”, 25 September 2026.