EVA Technical Library

Beginning with the Gemini 4 mission in June 1965, National Aeronautics and Space Administration (NASA) astronauts have ventured outside their spacecraft hundreds of times wearing specialized suits that protect them from the harsh environments of space and provide the oxygen and temperature control necessary to preserve life. The spacesuits NASA astronauts currently use on the International Space Station (ISS) – known as Extravehicular Mobility Units (EMU) – were developed more than 40 years ago and have far outlasted their original 15-year design life.

While maintaining the existing fleet of EMUs for use on the ISS, the Agency has also been working on multiple spacesuit development efforts to enable human exploration in deep space, including missions to Mars:  including support to various Program and Project development efforts as the Agency goals have evolved.

NASA, industry, and academia have made a significant investment in progressing spacesuit and related EVA technologies to support operations in environmental extremes beyond Lower Earth Orbit (LEO). NASA is currently designing and developing several exploration EVA (xEVA) capabilities including the Exploration Extravehicular Mobility Unit (xEMU). NASA plans to continue maturing the xEMU design (Critical Design Review scheduled for spring/summer of 2022) and other xEVA operations hardware to enable industry readiness to support an emerging commercial market for Extravehicular Activity (EVA) services, of which NASA intends to be one of the multiple customers. NASA is sharing its xEVA technical documentation in this technical library to facilitate industry access to design and requirements data. The data in this technical library is for reference only and is not a part of any particular procurement.

NASA will make available all technical data related the design and development of the xEMU to which the Government has the rights or license to disclose. This data will aid industry in developing their own EVA services capability. NASA will periodically update the technical library as it performs further xEVA capability risk-reduction, development, and maturation efforts. Note, the data in the library is subject to International Traffic in Arms Regulation/Export Administration Regulation (ITAR/EAR) and will only be made available to United States (U.S.) Citizens representing U.S. entities.