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Proceedings Paper

Integrated modeling activities for the James Webb Space Telescope: structural-thermal-optical analysis
Author(s): John D. Johnston; Joseph M. Howard; Gary E. Mosier; Keith A. Parrish; Mark A. McGinnis; A. Marcel Bluth; Kevin Kim; Kong Q. Ha
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Paper Abstract

The James Web Space Telescope (JWST) is a large, infrared-optimized space telescope scheduled for launch in 2011. This is a continuation of a series of papers on modeling activities for JWST. The structural-thermal-optical, often referred to as "STOP", analysis process is used to predict the effect of thermal distortion on optical performance. The benchmark STOP analysis for JWST assesses the effect of an observatory slew on wavefront error. Temperatures predicted using geometric and thermal math models are mapped to a structural finite element model in order to predict thermally induced deformations. Motions and deformations at optical surfaces are then input to optical models, and optical performance is predicted using either an optical ray trace or a linear optical analysis tool. In addition to baseline performance predictions, a process for performing sensitivity studies to assess modeling uncertainties is described.

Paper Details

Date Published: 12 October 2004
PDF: 11 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551704
Show Author Affiliations
John D. Johnston, NASA Goddard Space Flight Ctr. (United States)
Joseph M. Howard, NASA Goddard Space Flight Ctr. (United States)
Gary E. Mosier, NASA Goddard Space Flight Ctr. (United States)
Keith A. Parrish, NASA Goddard Space Flight Ctr. (United States)
Mark A. McGinnis, Swales Aerospace (United States)
A. Marcel Bluth, Swales Aerospace (United States)
Kevin Kim, Swales Aerospace (United States)
Kong Q. Ha, Jackson and Tull Chartered Engineering (United States)

Published in SPIE Proceedings Vol. 5487:
Optical, Infrared, and Millimeter Space Telescopes
John C. Mather, Editor(s)

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