dc.contributor.author |
Krist, John E. |
|
dc.contributor.author |
Trauger, John T. |
|
dc.contributor.author |
Unwin, Stephen C. |
|
dc.contributor.author |
Traub, Wesley A. |
|
dc.date.accessioned |
2013-03-15T19:31:03Z |
|
dc.date.available |
2013-03-15T19:31:03Z |
|
dc.date.issued |
2012-07-01 |
|
dc.identifier.citation |
SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012 |
en_US |
dc.identifier.clearanceno |
12-2612 |
|
dc.identifier.uri |
http://hdl.handle.net/2014/42855 |
|
dc.description.abstract |
To evaluate space-based coronagraphic techniques, end-to-end modeling is necessary to simulate realistic fields containing speckles caused by wavefront errors. Real systems will suffer from pointing errors and thermal and motioninduced mechanical stresses that introduce time-variable wavefront aberrations that can reduce the field contrast. A loworder wavefront sensor (LOWFS) is needed to measure these changes at a sufficiently high rate to maintain the contrast level during observations. We implement here a LOWFS and corresponding low-order wavefront control subsystem (LOWFCS) in end-to-end models of a space-based coronagraph. Our goal is to be able to accurately duplicate the effect of the LOWFS+LOWFCS without explicitly evaluating the end-to-end model at numerous time steps. |
en_US |
dc.description.sponsorship |
NASA/JPL |
en_US |
dc.language.iso |
en_US |
en_US |
dc.publisher |
Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. |
en_US |
dc.subject |
coronagraphs |
en_US |
dc.subject |
low order wavefront sensor (LOWFS) |
en_US |
dc.title |
End-to-end coronagraphic modeling including a low-order wavefront sensor |
en_US |
dc.type |
Preprint |
en_US |
dc.subject.NASATaxonomy |
Instrumentation and Photography |
en_US |