Integrated modeling activities for the James Webb Space Telescope: optical jitter analysis

Tristram T. Hyde; Kong Q. Ha; John D. Johnston; Joseph M. Howard; Gary E. Mosier

doi:10.1117/12.551806

12 October 2004 Integrated modeling activities for the James Webb Space Telescope: optical jitter analysis

Tristram T. Hyde, Kong Q. Ha, John D. Johnston, Joseph M. Howard, Gary E. Mosier

Proceedings Volume 5487, Optical, Infrared, and Millimeter Space Telescopes; (2004) https://doi.org/10.1117/12.551806
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

This is a continuation of a series of papers on the integrated modeling activities for the James Webb Space Telescope (JWST). Starting with the linear optical model discussed in part one, and using the optical sensitivities developed in part two, we now assess the optical image motion and wavefront errors from the structural dynamics. This is often referred to as “jitter” analysis. The optical model is combined with the structural model and the control models to create a linear structural/optical/control model. The largest jitter is due to spacecraft reaction wheel assembly disturbances which are harmonic in nature and will excite spacecraft and telescope structural. The structural/optic response causes image quality degradation due to image motion (centroid error) as well as dynamic wavefront error. Jitter analysis results are used to predict imaging performance, improve the structural design, and evaluate the operational impact of the disturbance sources.

Citation Download Citation

Tristram T. Hyde, Kong Q. Ha, John D. Johnston, Joseph M. Howard, and Gary E. Mosier "Integrated modeling activities for the James Webb Space Telescope: optical jitter analysis", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); https://doi.org/10.1117/12.551806

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