Project NEXUS, Ka-Band Backward-Compatible Relay (TDRS-Compatible)

NASA is preparing to address an impending gap in space-to-ground communications as its aging Tracking and Data Relay Satellite constellation approaches end-of-life between 2029 and 2031, with no current commercial alternatives offering backward-compatible legacy interfaces. Project NEXUS has been initiated to competitively acquire and demonstrate an on-orbit Ka-band relay capability that maintains full compatibility with existing TDRS systems, ensuring uninterrupted high-data-rate communications for critical missions during this transition period. The initiative is designed to sustain mission continuity while progressively integrating commercial services through a series of phased demonstrations and selective downselects, allowing for a smooth handoff to next-generation providers without disrupting operational continuity. The NEXUS program will deliver end-to-end Ka-band services that replicate the functionality of the current TDRS infrastructure, preserving the integrity of legacy mission interfaces while paving the way for future commercial adoption. Managed by NASA’s Marshall Space Flight Center, the project is forecasted to be solicited in 2026 and will involve on-orbit demonstrations to validate performance, reliability, and compatibility. The point of contact for technical inquiries is Brooke Thornton, with Danielle R. Barnes designated as the Small Business Specialist, indicating a commitment to inclusive contracting practices. Place of performance remains TBD, reflecting the program’s focus on space-based solutions with no fixed terrestrial location for execution.