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Proceedings Paper

JWST on-orbit multi-field wavefront control with a Kalman filter
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Paper Abstract

An effective multi-field wavefront control (WFC) approach is demonstrated for the James Webb Space Telescope (JWST) on-orbit optical telescope element (OTE) fine-phasing using wavefront measurements at the NIRCam pupil, and the optical and computational implications of this approach are discussed. The integration of a Kalman Filter as an optical state estimator into the JWST wavefront control process to further improve the robustness of the fine-phasing JWST OTE alignment will also be discussed. Through a comparison of WFC performances between the JWST on-orbit and ground-test optical system configurations, the connection (and a possible disconnection) between WFC and optical system alignment under these circumstances are analyzed. Our MACOS-based [2] computer simulation results will be presented and discussed.

Paper Details

Date Published: 24 August 2005
PDF: 14 pages
Proc. SPIE 5867, Optical Modeling and Performance Predictions II, 58670T (24 August 2005); doi: 10.1117/12.615383
Show Author Affiliations
John Z. Lou, Jet Propulsion Lab. (United States)
David Redding, Jet Propulsion Lab. (United States)
Norbert Sigrist, Jet Propulsion Lab. (United States)
Yan Zhang, Jet Propulsion Lab. (United States)
Scott Basinger, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 5867:
Optical Modeling and Performance Predictions II
Mark A. Kahan, Editor(s)

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