欧空局签18份合同 80家伙伴推进IRIS²低轨架构

On Sept. 17, 2026, the European Space Agency (ESA) initiated the next technology development phase for the European Union’s Infrastructure for Resilience, Interconnection and Security by Satellite (IRIS²) multi-orbit constellation. Under its Connectivity and Secure Communications directorate, ESA signed 18 contracts engaging a industrial consortium of 80 space companies, research institutes, and technology SMEs across Europe. The agreements focus on evaluating and maturing Low-Low Earth Orbit (Low-LEO) concepts, resilient communications links, and quantum-resistant cryptographic payloads. Program Context and Sovereign Connectivity Mandate The IRIS² program represents the European Union’s multi-orbit sovereign constellation initiative designed to guarantee secure, high-speed broadband and encrypted government communications across European member states. Structured to complement the existing Galileo navigation and Copernicus Earth observation systems, IRIS² aims to eliminate European dependence on non-European commercial satellite constellations for critical civil and defense infrastructure. The newly awarded contract packages address the evolutionary roadmap of the constellation beyond its baseline operational architecture. By funding parallel technical studies and payload demonstrations, ESA and the European Commission seek to integrate lower-altitude Low Earth Orbit layers to reduce signal latency and enhance spatial throughput for tactical military, aviation, and critical infrastructure users. Technical Framework and Low-LEO Architecture The 18 contract streams target key technological domains required to operate robust satellite networks in lower orbital altitudes. Primary engineering focus areas include atmospheric drag mitigation, high-efficiency propulsion, optical inter-satellite links, and advanced spatial frequency reuse. - Orbital Regime Focus: Low-LEO mission concepts operating below standard 600–1,200 kilometer Low Earth Orbit altitudes to achieve reduced transmission latency. - Security Payloads: Integration of space-based Quantum Key Distribution (QKD) and post-quantum cryptographic protocols to secure government communications traffic. - Industrial Consortium: 80 participating industrial firms and research organizations spread across ESA member states. - System Interoperability: Software-defined payload designs supporting seamless handoffs between GEO, MEO, and Low-LEO space segments. By utilizing lower-altitude LEO planes, the proposed sec…