Sept 10 (Reuters) - Aerospace group Thales Alenia Space has signed an agreement with satellite ‌operator Eutelsat to supply government payloads for ‌330 of the European Union's IRIS² low Earth orbit satellites, it ​said on Thursday.

The company, a joint venture between France's Thales and Italy's Leonardo, said the order represented a tranche worth around €500 million ($582 million) ‌under a broader ⁠IRIS² contract that is expected to exceed €3 billion.

Thales Alenia Space will supply ⁠the technical equipment to be transported on Eutelsat satellites, known as payloads, which are intended ​to support ​a secure space-based ​5G network, enabling in-orbit ‌traffic routing, active interference management and secure end-to-end communications, it said.

IRIS² is the EU's planned secure satellite communications constellation aimed at giving European governments and their armed forces a sovereign alternative ‌to non-European systems, most notably ​Elon Musk's SpaceX. However, ​its rollout is facing ​questions as Germany pursues a separate ‌national military satellite network, ​prompting fears ​about fragmentation of European efforts and rising costs.

The first 66 satellites under the programme ​will be launched ‌starting in 2029.

(Reporting by Florence ​Loève; Writing by Gianluca Lo Nostro; ​Editing by Milla Nissi-Prussak)