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Proceedings Paper

Radiance from an ice contaminated surface
Author(s): J. Arenberg; J. Adamson; G. Harpole; M. Niedner; C. Bowers; K. Mehalick; P. Lightsey
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Paper Abstract

The formation of water ice on key thermal and optical surfaces is a factor in the design of the James Webb Space Telescope. Many of these concerns are related to the mid-infrared stray light performance of the system. In this paper, an expression for the radiance of a contaminated surface is formulated, including directional, film thickness and cooling effects. The resulting formula is then evaluated to show how radiance emanating from the surface changes for various thicknesses of the ice layer as a function wavelength and the local thermal environment. This paper concludes with an analysis and discussion of this complex behavior.

Paper Details

Date Published: 9 August 2016
PDF: 7 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99046G (9 August 2016); doi: 10.1117/12.2234487
Show Author Affiliations
J. Arenberg, Northrop Grumman Aerospace Systems (United States)
J. Adamson, Northrop Grumman Aerospace Systems (United States)
G. Harpole, Northrop Grumman Aerospace Systems (United States)
M. Niedner, NASA Goddard Space Flight Ctr. (United States)
C. Bowers, NASA Goddard Space Flight Ctr. (United States)
K. Mehalick, NASA Goddard Space Flight Ctr. (United States)
P. Lightsey, Ball Aerospace (United States)


Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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