Originally developed to be integrated on NASA's HALO habitation module for the Gateway to provide communications between the orbiting station and Moon explorers, Lunar Link reached completion as plans for the programme changed. Following NASA’s decision earlier this year to pause work on the Gateway, ESA is studying how Lunar Link’s capabilities could be used for future lunar missions. 

Testing, testing

Much has happened since Lunar Link’s antenna testing in March. Since then, the full communication system, with all electronics integrated in its baybox, completed its environmental test campaign and engineers connected it to the two high gain antennas and tested the full system together for the first time. This included another balloon-assisted antenna deployment test, this time with the complete Lunar Link. 

Over the summer, a team from NASA’s Johnson Space Center joined the European Lunar Link team at Thales Alenia Space in Cannes, France, for an end-to-end communications demonstration. The NASA team brought a large set of racks capable of simulating a user on the Moon, allowing engineers to establish and test communications through Lunar Link, including encryption. The demonstration was successful, showing the system performs exactly as intended. 

Space-ready

In September, ESA and Thales Alenia Space, Lunar Link’s prime contractor, began the qualification and acceptance review process that is expected to be completed by end of this year. 

This milestone marked the transition from the development phase to a flight-ready system, confirming that Lunar Link satisfied its technical requirements and was ready for operation.  

Following completion of the review and a final software update, the flight hardware will be placed into controlled storage, where it will remain in flight-ready condition while its future is decided. 

Looking ahead

In July, ESA issued an invitation to tender for studies examining how Lunar Link could be repurposed for a future lunar mission. 

Designed to provide communications between spacecraft in lunar orbit and users on the Moon’s surface, Lunar Link offers capabilities that future exploration architectures will need. By accommodating it on a platform with an additional antenna for an Earth link, it could become an independent communication relay able to serve future Moon missions by ESA and international partners. 

The studies will explore how Lunar Link could be delivered to lunar orbit and operated as an independent communications system. They will assess potential spacecraft concepts, orbital options and development schedules, as well as possible cooperation with ESA’s Moonlight programme, and opportunities for carrying additional scientific or technology payloads.

A European achievement

Lunar Link’s story began as part of ESA’s ESPRIT programme. Over the years, the teams adapted to evolving requirements, supply-chain challenges and technical setbacks. 

When plans for the Gateway changed in March, Lunar Link was only three months away from completion. With the final test campaign already under way and testing facilities reserved, ESA and European industry chose to finish what they had started, bringing the system to full flight readiness. 

Built by teams across Europe, including Thales Alenia Space in France, Belgium, Spain and Italy, MDA in the United Kingdom and SENER in Spain, Lunar Link represents years of cooperation, innovation and engineering excellence from across the continent.  

Today, Lunar Link is complete: fully built, fully tested and ready for space. While its original mission may have changed, the expertise, capability and hardware developed through the programme are ready for whatever comes next. 

Quelle: ESA