A rendering of Kepler Communications’ optical relay network. Photo: Kepler

Kepler Communications reports it has demonstrated space-to-ground optical data relay between its satellite in orbit and a Cailabs optical ground station. 

Kepler’s two optical Pathfinder satellites, launched in 2023, are equipped with Tesat SCOT80 optical communications terminals. Kepler said it demonstrated full Space Development Agency (SDA) standard data rates and acquisition in multiple space-to-ground scenarios between a Pathfinder satellite and Cailabs’ optical ground station (OGS) in Rennes, France.

This is the first step to validating other space-to-ground scenarios, including communicating with airborne assets. Kepler previously validated optical inter-satellite links, transmitting data between two of its relay satellites in Low-Earth Orbit (LEO).  

“Optical data relay is no longer a theoretical concept. It is tested, proven, and operational in many acquisition scenarios,” said Mina Mitry, chief executive officer and co-founder of Kepler Communications. “This is a critical milestone in creating resilient on-orbit optical infrastructure, proving our ability to leverage the power of light to improve the future of space communications.”

Kepler, based in Canada, is building a network of optical relay satellites and the company is preparing to launch the first tranche in the fourth quarter of this year. The first tranche will include nine satellites and a spare satellite in Sun-Synchronous Orbit.