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Influence of Environment on Measurements Made on EVA or “Space Station Freedom”
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English
Abstract
A Portable Contamination/Leak Detector (PC/LD) is being developed for use by crew on Extravehicular Activity (EVA) to locate trace leaks from Space Station Freedom (SSF) systems and to monitor the surfaces of the Extravehicular Mobility Unit (EMU) for toxic contaminants being removed prior to ingress to the airlock. As with any trace level detector the background in which it operates has a significant impact on the operation and design of the instrument. The PC/LD operates in space vacuum and is sensitive to the composition and pressure which exists near the station.
This paper describes the PC/LD mission, some data on the composition of ambient space environment and implications of that data on the PC/LD's design and usage.
Authors
- Eugenie Hainsworth - Arthur D. Little, Inc.
- Gary Koger - Arthur D. Little, Inc.
- Dale Larson - Arthur D. Little, Inc.
- James Valentine - Arthur D. Little, Inc.
- Joseph Brooks - Lockheed Missiles and Space Co., Inc.
- Albert Copeland - Lockheed Missiles and Space Co., Inc.
- Philip Landis - Lockheed Missiles and Space Co., Inc.
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Citation
Hainsworth, E., Koger, G., Larson, D., Valentine, J. et al., "Influence of Environment on Measurements Made on EVA or “Space Station Freedom”," SAE Technical Paper 921379, 1992, https://doi.org/10.4271/921379.Also In
References
- “Critical Item Development Specification for EVA Portable Contamination Detector” LMSC 5825280A Lockheed Missiles and Space Company, Inc. Houston, TX
- Miller, E.R. “STS-2, -3, -4 Induced Environment Contamination Monitor, Summary Report, IX Mass Spectrometer” NASA TM-82524 February 1983
- Green B.D. Caledonia G.E. Wilkerson T.D. “The Shuttle Environment: Gases, Particulates, and Glow” J. Spacecraft 22, 500 ff 1985
- Shawhan S.D. Murphy G.B. Pickett J.S. “Plasma Diagnostics Package Initial Assessment of the Shuttle Orbiter Plasma Environment” J. Spacecraft 21, 387ff 1984