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Proceedings Paper

Optical modeling activities for NASA's James Webb Space Telescope (JWST): Part V. Operational alignment updates
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Paper Abstract

This paper is part five of a series on the ongoing optical modeling activities for the James Webb Space Telescope (JWST). The first two papers discussed modeling JWST on-orbit performance using wavefront sensitivities to predict line of sight motion induced blur, and stability during thermal transients. The third paper investigates the aberrations resulting from alignment and figure compensation of the controllable degrees of freedom (primary and secondary mirrors), which may be encountered during ground alignment and on-orbit commissioning of the observatory, and the fourth introduced the software toolkits used to perform much of the optical analysis for JWST. The work here models observatory operations by simulating line-of-sight image motion and alignment drifts over a two-week period. Alignment updates are then simulated using wavefront sensing and control processes to calculate and perform the corrections. A single model environment in Matlab is used for evaluating the predicted performance of the observatory during these operations.

Paper Details

Date Published: 11 July 2008
PDF: 10 pages
Proc. SPIE 7017, Modeling, Systems Engineering, and Project Management for Astronomy III, 70170X (11 July 2008); doi: 10.1117/12.790237
Show Author Affiliations
Joseph M. Howard, NASA Goddard Space Flight Ctr. (United States)
Kong Q. Ha, NASA Goddard Space Flight Ctr. (United States)
Ron Shiri, NASA Goddard Space Flight Ctr. (United States)
J. Scott Smith, NASA Goddard Space Flight Ctr. (United States)
Gary Mosier, NASA Goddard Space Flight Ctr. (United States)
Danniella Muheim, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 7017:
Modeling, Systems Engineering, and Project Management for Astronomy III
George Z. Angeli; Martin J. Cullum, Editor(s)

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