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Laboratory Testbed Verification of Data Post-Processing Strategies for the WFIRST Coronagraph Instrument

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dc.contributor.author Zimmerman, Neil
dc.contributor.author Pueyo, Laurent
dc.contributor.author Soummer, Rémi
dc.contributor.author Mennesson, Bertrand
dc.contributor.author Patel, Rahul
dc.contributor.author Cady, Eric
dc.contributor.author Seo, Byoung-Joon
dc.contributor.author Poberezhskiy, Ilya
dc.contributor.author Ygouf, Marie
dc.date.accessioned 2020-05-13T22:59:04Z
dc.date.available 2020-05-13T22:59:04Z
dc.date.issued 2018-06-12
dc.identifier.citation SPIE Astronomical Telescopes + Instrumentation, Austin, Texas, June 12 - 14, 2018 en_US
dc.identifier.clearanceno 18-3006
dc.identifier.uri http://hdl.handle.net/2014/48427
dc.description.abstract One of the objectives of the WFIRST Coronagraph Instrument is to demonstrate post-processing algorithms for space-based exoplanet imaging data in the regime of very high contrast ratios (< 1E-8). We analyzed two 15-hour time series of laboratory images acquired with prototype coronagraph designs on a vacuum chamber testbed at JPL. These data sets enabled us to test the performance of reference differential imaging (RDI) PSF subtraction as a function of time and Euclidean (L2) speckle pattern distance. Starting from an analytical relationship between speckle pattern stability and classical subtraction gain, we compared the classical subtraction result to those of the KLIP RDI algorithm. In both data sets, KLIP RDI contrast gains are typically 3-4× greater than those of classical subtraction. These results suggest that a diverse reference PSF library will enable a significant gain in sensitivity beyond that suggested by the raw, frame-to-frame speckle pattern stability. 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, 2018 en_US
dc.title Laboratory Testbed Verification of Data Post-Processing Strategies for the WFIRST Coronagraph Instrument en_US
dc.type Preprint en_US


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