SelenIRIS: a Moon-Earth Optical Communication Terminal for CubeSats

Abstract

Satellite miniaturization and sinking costs of manufacturing and launches are bringing Moon missions in the focus of many space companies and agencies. However, achieving the desired data rates on CubeSats over long ranges is proving increasingly challenging with traditional radio-frequency communication systems. Free-space optical (FSO) communications offer a compact, light, and low-power alternative with higher data throughput and fewer limitations (e.g., fewer governmental regulations, channel interference, eavesdropping. . . ). Based on its long heritage of laser communications and new-space technology, the German Aerospace Center (DLR) is investigating SelenIRIS-a miniaturized terminal for Moon-Earth optical data transmissions-for its OSIRIS program. This paper will analyze the necessary adaptations that are required to transfer the technology from the flight-proven low Earth orbit terminals like OSIRIS4CubeSat (O4C) [1] to a concept mission in Lunar orbit.

The evolution of lunar communication—From the beginning to the present

“…Brandl et al 40 compare the OOK and M‐PPM procedures in detail in their article, whereas Nonay et al 41 investigate the NRZ‐OOK and PPM techniques. Of course, pulse modulation is the appropriate solution to achieve energy efficiency and high data rates with low bandwidth connections.…”