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Sleep Environment Recommendations for Future Spaceflight VehiclesWe conducted a comprehensive literature review summarizing optimal sleep hygiene parameters for lighting, temperature, airflow, humidity, comfort, intermittent and erratic sounds, and privacy and security in the sleep environment. We reviewed the design and use of sleep environments in a wide range of cohorts including among aquanauts, expeditioners, pilots, military personnel and ship operators. We also reviewed the specifications and sleep quality data arising from every NASA spaceflight mission, beginning with Gemini. Finally, we conducted structured interviews with individuals experienced in sleeping in non-traditional spaces including oilrig workers, Navy personnel, astronauts, and expeditioners. We also interviewed the engineers responsible for the design of the sleeping quarters presently deployed on the International Space Station. We found that the optimal sleep environment is cool, dark, quiet, and is perceived as safe and private. There are wide individual differences in the preferred sleep environment; therefore modifiable sleeping compartments are necessary to ensure all crewmembers are able to select personalized configurations for optimal sleep. It is possible to utilize lessons learned from prior spaceflight missions and from other industries in order to guide the design of an optimal sleep space suitable for long-duration spaceflight.
Document ID
Acquisition Source
Ames Research Center
Document Type
Caddick, Zachary Alan
(San Jose State Univ. Moffett Field, CA, United States)
Gregory, Kevin Bruce
(San Jose State Univ. Moffett Field, CA, United States)
Flynn-Evans, Erin Elizabeth
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
March 29, 2019
Publication Date
July 27, 2016
Subject Category
Behavioral Sciences
Report/Patent Number
Meeting Information
Meeting: Applied Human Factors and Ergonomics Conference
Location: Orlando, FL
Country: United States
Start Date: July 27, 2016
End Date: July 31, 2016
Sponsors: Applied Human Factors and Ergonomics International
Funding Number(s)
WBS: WBS 425425.
Distribution Limits
Public Use Permitted.
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