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Proceedings Paper

Development of versatile molecular transport model for modeling spacecraft contamination
Author(s): Chien W. Chang; Keith Kannenberg; Michael H. Chidester
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Paper Abstract

This paper describes a MATLAB-based molecular transport model developed for modeling contamination of spacecraft and optical instruments in space. The model adopts the Gebhart inverse-matrix theory for thermal radiation to analyze mass (molecular) transfer due to direct and reflected flux processes by balancing the mass fluxes instead of heat fluxes among surfaces with prescribed boundary conditions (contamination sticking fractions). The model can easily input view factor results from current thermal tools as well as measured outgassing data from ASTM E 1559 tests or vacuum bake-outs of flight components. Application examples of a geosynchronous satellite and an optical telescope are given to demonstrate versatile applications of the developed model.

Paper Details

Date Published: 7 September 2010
PDF: 8 pages
Proc. SPIE 7794, Optical System Contamination: Effects, Measurements, and Control 2010, 77940O (7 September 2010); doi: 10.1117/12.860044
Show Author Affiliations
Chien W. Chang, Lockheed Martin Space Systems Co. (United States)
Keith Kannenberg, Lockheed Martin Space Systems Co. (United States)
Michael H. Chidester, Lockheed Martin Space Systems Co. (United States)


Published in SPIE Proceedings Vol. 7794:
Optical System Contamination: Effects, Measurements, and Control 2010
Sharon A. Straka; Nancy Carosso, Editor(s)

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