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Operational Assessment of Apollo Lunar Surface Extravehicular ActivityQuantifying the operational variability of extravehicular activity (EVA) execution is critical to help design and build future support systems to enable astronauts to monitor and manage operations in deep-space, where ground support operators will no longer be able to react instantly and manage execution deviations due to the significant communication latency. This study quantifies the operational variability exhibited during Apollo 14-17 lunar surface EVA operations to better understand the challenges and natural tendencies of timeline execution and life support system performance involved in surface operations. Each EVA (11 in total) is individually summarized as well as aggregated to provide descriptive trends exhibited throughout the Apollo missions. This work extends previous EVA task analyses by calculating deviations between planned and as-performed timelines as well as examining metabolic rate and consumables usage throughout the execution of each EVA. The intent of this work is to convey the natural variability of EVA operations and to provide operational context for coping with the variability inherent to EVA execution as a means to support future concepts of operations.
Document ID
Acquisition Source
Ames Research Center
Document Type
Technical Publication (TP)
Miller, Matthew James
(Georgia Inst. of Tech. Atlanta, GA, United States)
Claybrook, Austin
(Georgia Inst. of Tech. Atlanta, GA, United States)
Greenlund, Suraj
(Georgia Inst. of Tech. Atlanta, GA, United States)
Marquez, Jessica J.
(NASA Ames Research Center Moffett Field, CA United States)
Feigh, Karen M.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Date Acquired
August 3, 2017
Publication Date
January 7, 2017
Subject Category
Man/System Technology And Life Support
Statistics And Probability
Report/Patent Number
Funding Number(s)
WBS: WBS 811073.
Distribution Limits
Public Use Permitted.
planning and scheduling
metabolic expenditure
Apollo extravehicular activities
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