Early Results from NASA’s Laser Communications Relay Demonstration (LCRD) Experiment Program

The National Aeronautics and Space Administration’s (NASA) Laser Communications Relay Demonstration (LCRD)
mission began its two-year Experiment Program in June 2022. This experimental phase includes long-term measurement
of the effects of the atmosphere (turbulence, weather) on the performance and availability of lasercom. Furthermore,
various future operational scenarios including robotic and exploration missions and various network service
configurations are being emulated. In addition to experiments and demonstrations proposed by the LCRD Investigator
Team, NASA enables individuals and groups from government agencies, academia, and industry to propose experiments
under the LCRD Guest Experimenters Program. This conference paper provides highlights of the early LCRD
experiments and a preview of the future experiments, including relaying data to and from the Integrated LCRD Low-Earth Orbit (LEO) User Modem and Amplifier Terminal (ILLUMA-T) on the International Space Station.

The LCRD geosynchronous payload includes two laser communications terminals interconnected via an onboard
electronic switch, and can relay information between two optical ground stations located in California and Hawaii.
LCRD is a joint project involving NASA Goddard Space Flight Center (GSFC), the NASA Jet Propulsion Laboratory
(JPL), and Massachusetts Institute of Technology Lincoln Laboratory (MIT LL).