NASA's Deep Space Optical Communications (DSOC) on Psyche mission concluded September 2, 2025, after 65 passes from up to 2.34 AU (350 million km); achieved 20.8 Mbps at 2.28 AU clear skies, 12.4 Mbps at 2.34 AU partial clouds, max 267 Mbps at 19 million miles, 8.3 Mbps peak at 386 million km, totaling 13.6 terabits downlinked.
DSOC demonstrates 10-100x higher data rates than RF systems like Mars Reconnaissance Orbiter's 0.5 Mbps max, enabling broadband-like transmission over Mars distances; for Lunar Ark, this supports high-volume data relays for habitat monitoring, genetic archives, and AI coordination, reducing existential isolation risks from Earth blackout.
Ark team should monitor NASA reactivation in H2 2026, research DSOC integration with Lunar Gateway or Starlink for 1-10 Gbps lunar-Earth links, and prioritize laser terminal procurement for Ark comms array to ensure 1000-year data sovereignty.