Transmitting data to relay satellites is no new feat for the space station. Since its completion in 1998 the orbiting laboratory has relied on the fleet of radio frequency relay satellites known as NASA’s Tracking and Data Relay Satellites, which are part of the agency’s Near Space Network. Relay satellites provide missions with constant contact with Earth because they can see the spacecraft and a ground antenna at the same time.
Laser communications could be a game-changer for researchers on Earth with science and technology investigations aboard the space station. Astronauts conduct research in areas like biological and physical sciences, technology, Earth observations, and more in the orbiting laboratory for the benefit of humanity. ILLUMA-T could provide enhanced data rates for these experiments and send more data back to Earth at once. In fact, at 1.2 Gbps, ILLUMA-T can transfer the amount of data equivalent to an average movie in under a minute.
The ILLUMA-T / LCRD end-to-end laser communications relay system is one small step for NASA, but one giant leap for space communications capabilities. Together with previous and future demonstrations, NASA is showcasing the benefits laser communications systems can have for both near-Earth and deep space exploration.