EUMETSAT turns 40: International cooperation as a driver of global leadership in Earth observation

Over the past four decades, the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) has evolved into one of the leading global operational actors in Earth observation for meteorological and climate applications. This article examines how international cooperation has accompanied this transformation, supporting Europe’s contribution to the global meteorological, climate, environmental and hydrological monitoring system. It argues that cooperation has been a structural enabler of operational, continuous, user-focused and state-of-the-art services to EUMETSAT’s Member States and the global community. The first part situates EUMETSAT within the World Meteorological Organization’s (WMO) governance framework and priorities. It highlights how EUMETSAT’s Convention and data policy are purposefully aligned with global principles shaping requirements for coverage, continuity, interoperability and data openness, and examines what their evolution, such as the WMO Integrated Global Observing System 2050 update and the WMO Unified Data Policy (Resolution 1), implies for EUMETSAT as an operational satellite organisation. Fostering the general principles of global cooperation laid down by WMO, the second part assesses EUMETSAT’s practical implementation of international cooperation as a visionary, founding principle, built upon a unique European cooperation model. It reviews historical milestones, the organisation’s inaugural role of permanent Secretariat of the Coordination Group for Meteorological Satellites (CGMS), as well as its multilateral and bilateral engagements with major international space institutions. Examples of operational data sharing, scientific cooperation and mission synergies showcase the value added to numerical weather prediction, climate services, disaster resilience and capacity development for societies worldwide. The final part explores how international cooperation will shape the next decade and the evolution of the observing systems for meteorology and climate, from cloud-based architectures to artificial intelligence integration. The article concludes that EUMETSAT’s cooperative efforts have enabled the organisation to emerge as the European mature, globally relevant operational Earth observation actor in its area of expertise, set to remain essential as new challenges and opportunities arise.