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Performance of dispersed fringe sensor in the presence of segmented mirror aberrations – modeling and simulation

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dc.contributor.author Shi, Fang
dc.contributor.author Basinger, Scott A.
dc.contributor.author Redding, David C.
dc.date.accessioned 2006-11-06T22:43:39Z
dc.date.available 2006-11-06T22:43:39Z
dc.date.issued 2006-05-24
dc.identifier.citation SPIE Astronomical Telescopes 2006 : Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, Orlando, Florida, May 24 -31, 2006 en
dc.identifier.clearanceno 06-1547
dc.identifier.uri http://hdl.handle.net/2014/39902
dc.description.abstract Dispersed Fringe Sensing (DFS) is an efficient and robust method for coarse phasing of a segmented primary mirror such as the James Webb Space Telescope (JWST). In this paper, modeling and simulations are used to study the effect of segmented mirror aberrations on the fringe image, DFS signals and DFS detection accuracy. The study has shown due to the pixilation spatial filter effect from DFS signal extraction the effect of wavefront error is reduced and DFS algorithm will be more robust against wavefront aberration by using multi-trace DFS approach. We also studied the JWST Dispersed Hartmann Sensor (DHS) performance in presence of wavefront aberrations caused by the gravity sag and we use the scaled gravity sag to explore the JWST DHS performance relationship with the level of the wavefront aberration. This also includes the effect from line-of-sight jitter. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 414596 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject wavefront sensing and control en
dc.subject dispersed fringe sensor en
dc.subject segmented mirrors en
dc.subject James Webb Space Telescope (JWST) en
dc.subject wavefront aberration en
dc.title Performance of dispersed fringe sensor in the presence of segmented mirror aberrations – modeling and simulation en
dc.type Preprint en


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