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Surface contamination monitoring by the measurement of scattering distribution functionsThis paper describes the use of Bidirectional Scattering Distribution Functions (BSDF) to quantify surface degradation, thus providing an effective method for contamination monitoring. This approach to contamination monitoring is based on the use of witness surfaces (mirrors or glass slides) located next to the critical surfaces. Contaminant accretion can be monitored during all phases of spacecraft fabrication, assembly, and testing. The method can be applied in other areas of contamination control such as monitoring of clean room environments. The BSDF can also prove extremely useful in establishing contamination control requirements and acceptability criteria. This paper describes the apparatus adopted to perform BSDF measurements and discusses some practical aspects of data collection. The results obtained in contamination monitoring programs performed at the NASA Goddard Space Flight Center are presented. Some possible new applications of this monitoring technique are also addressed.
Document ID
19870059406
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Carosso, Paola A.
(TS Infosystems, Inc. Lanham, MD, United States)
Pugel, Nancy J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Publication Information
Publication: Journal of Environmental Sciences
Volume: 30
ISSN: 0022-0906
Subject Category
Instrumentation And Photography
Accession Number
87A46680
Distribution Limits
Public
Copyright
Other

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