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Chapter 5 of 28Space & aerospace7 min read · 2 exhibits

Technology Readiness Assessment

Which station technologies are flight-proven, and what still has to be qualified?

Chapter summary

Every subsystem a station needs has flown on the ISS. The open questions are integration at a lower cost, qualification within the schedule and launch dependence.

Key takeaways

  1. 1

    Rigid pressure shells, open-loop life support, power and docking are at TRL 8–9.

  2. 2

    Inflatable habitats (TRL 6–7) and commercial-scale regenerative life support (TRL 7–8) carry the most technical risk among the systems NASA needs.

  3. 3

    Qualification, not invention, moves dates: ISS attachment alone adds an estimated 18–24 months of approvals.

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