The National Aeronautics and Space Administration (NASA) successfully completed the first two-way laser communications link between the Laser Communications Relay Demonstration (LCRD) and the Integrated LCRD Low Earth Orbit User Modem and Amplifier Terminal (ILLUMA-T) on the International Space Station, marking significant progress in space communications technology.

NASAILLUMA-T payload in Goddard's clean room. The payload was installed aboard the International Space Station to demonstrate higher data transfer rates in conjunction with NASA's Laser Communications Relay Demonstration. Source: Dennis Henry

On December 5, 2023, a NASA technical experiment on the International Space Station completed the first laser link with the on-orbit laser relay system. Together, they completed NASA's first two-way, end-to-end laser relay system.

NASA's LCRD (Laser Communications Relay Demonstration) and the new space station demonstration ILLUMA-T (Integrated LCRD Low Earth Orbit User Modem and Amplifier Terminal) successfully exchanged data for the first time. LCRD and ILLUMA-T demonstrate how a user mission, in this case the space station, can benefit from a laser communications repeater located in geostationary orbit.

NASA's ILLUMA-T payload communicates with the LCRD via laser signals. Source: NASA/DaveRyan

Laser communications use infrared light instead of traditional radio waves to send and receive signals. Infrared light has a narrower wavelength, so spacecraft can pack more data into each transmission. The use of laser communications can greatly improve the efficiency of data transmission and accelerate the pace of scientific discovery.

Benefits of laser communications: more efficient, lighter systems, greater safety and more flexible ground systems. Image credit: NASA/DaveRyan

On November 9, NASA’s SpaceX 29th Commercial Resupply Services mission launched cargo and new scientific experiments to the space station, including ILLUMA-T. Upon arrival, the payload was installed onto the space station's Japanese Experimental Module - Exposure Facility.

On November 9, 2023, the SpaceX Falcon 9 rocket carrying the Dragon spacecraft lifted off from the NASA 39A launch site at the Kennedy Space Center in Florida. This was the company's 29th commercial supply service mission to the International Space Station for NASA. Dragon" will deliver scientific research, technology demonstrations, crew supplies and hardware to the space station in support of the Expedition 70 crew, including NASA's Integrated Laser Communications Relay Demonstration Low Earth Orbit User Modem and Amplifier Terminal (ILLUMA-T) and the Atmospheric Wave Experiment (AWE). Image credit: NASA/Kim Shiflett

ILLUMA-T and LCRD are part of NASA's Space Communications and Navigation (SCaN) program, which aims to demonstrate how laser communications technology can bring significant benefits to science and exploration missions.

ILLUMA-T's first connection to an LCRD, dubbed "First Light," is the latest demonstration that laser communications are the future. "Laser communications not only bring back more data from science missions, but also serve as a critical two-way link for NASA, allowing astronauts to stay in touch with Earth as they explore the moon, Mars and beyond.

NASA's ILLUMA-T payload achieves "first light" with LCRD. In this video, Matt Magsamen explains the First Light milestone. Source: NASA

Shortly after the space station was installed, operating engineers began on-orbit testing to ensure the ILLUMA-T payload was functioning properly. Now it is communicating with LCRD, a repeater launched in 2021 that has been configured in more than 300 experiments to help NASA perfect laser communication technology. LCRD and ILLUMA-T are exchanging data at 1.2Gbps per second.

"Experiments have proven that we can overcome the technical challenges of successfully enabling space communications using laser communications. We are now conducting operational demonstrations and experiments that will allow us to optimize the infusion of proven technologies into our missions to maximize our exploration and science," said David Israel, NASA Space Communications and Navigation Architect.

NASA laser communications roadmap. Image credit: NASA/DaveRyan

LCRD experiments are conducted in collaboration with industry, academia and other government agencies. ILLUMA-T is now LCRD's first user experiment in space. NASA is still accepting experiments with the LCRD.

Compiled source: ScitechDaily