Functional Volume Assessment of an Early Version of the Mars Transit Habitat

During the summer of 2020, NASA assessed the transit habitat concept that was being used in Mars human exploration architecture studies. This assessment had six primary objectives: (1) provide a sanity check to the transit habitat concept layout; (2) understand if we can fit the hardware and functional tasks in the volume; (3) provide a high-level assessment of how aggressive the layout is; (4) generate a list of challenges or assumptions necessary to make it work; (5) generate a list of future work to refine understanding; and (6) identify proposed requirements. The results of this evaluation are discussed, including methodological challenges and rating challenges. Acceptability results are discussed for functions that the participants were able to rate and participant comments for functions that could not be evaluated are also described. Final conclusions are described, including challenges or assumptions needed to make the transit habitat concept design acceptable, future work needed to refine understanding of the transit habitat concept, and proposed habitat requirements based on test data. While NASA has since moved away from this architecture, the assessment is still useful to inform the design of future transit habitats or other deep space crewed vehicles.