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Atomic oxygen and ultraviolet radiation mission total exposures for LDEF experimentsAn analytical treatment of the effect of thermal molecular velocity on spacecraft atomic oxygen (AO) flux is presented. The analysis leads to a closed form equation that incorporates the effect of atmospheric temperature, number density, spacecraft velocity, and incidence angle on AO flux. The effects of atmospheric rotation, solar activity, and geomagnetic index on AO flux are also included on the computer model. Data developed with the model are presented for the Long Duration Exposure Facility (LDEF). The results incorporate variations in the defining environmental and orbital parameters of the spacecraft over its six year orbital flight. Cumulative ultraviolet solar and albedo exposures were calculated .
Document ID
Document Type
Conference Paper
Bourassa, R. J.
(Boeing Aerospace and Electronics Co. Seattle, WA, United States)
Gillis, J. R.
(Boeing Aerospace and Electronics Co. Seattle, WA, United States)
Rousslang, Ken W.
(Boeing Aerospace and Electronics Co. Seattle, WA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
Atomic And Molecular Physics
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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