Low-signal, coronagraphic wavefront estimation with Kalman filtering in the high contrast imaging testbed

A. J.Eldorado Riggs, Eric J. Cady, Camilo M. Prada, Brian D. Kern, Hanying Zhou, N. Jeremy Kasdin, Tyler D. Groff

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For direct imaging and spectral characterization of cold exoplanets in reflected light, the proposed Wide-Field Infrared Survey Telescope (WFIRST) Coronagraph Instrument (CGI) will carry two types of coronagraphs. The High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Laboratory has been testing both coronagraph types and demonstrated their abilities to achieve high contrast. Focal plane wavefront correction is used to estimate and mitigate aberrations. As the most time-consuming part of correction during a space mission, the acquisition of probed images for electric field estimation needs to be as short as possible. We present results from the HCIT of narrowband, low-signal wavefront estimation tests using a shaped pupil Lyot coronagraph (SPLC) designed for the WFIRST CGI. In the low-flux regime, the Kalman filter and iterated extended Kalman filter provide faster correction, better achievable contrast, and more accurate estimates than batch process estimation.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2016
Subtitle of host publicationOptical, Infrared, and Millimeter Wave
EditorsHoward A. MacEwen, Makenzie Lystrup, Giovanni G. Fazio
PublisherSPIE
ISBN (Electronic)9781510601871
DOIs
StatePublished - Jan 1 2016
EventSpace Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave - Edinburgh, United Kingdom
Duration: Jun 26 2016Jul 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9904
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherSpace Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
CountryUnited Kingdom
CityEdinburgh
Period6/26/167/1/16

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Keywords

  • Coronagraph
  • High contrast
  • Kalman filter
  • Shaped pupil
  • WFIRST
  • Wavefront correction

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  • Cite this

    Riggs, A. J. E., Cady, E. J., Prada, C. M., Kern, B. D., Zhou, H., Kasdin, N. J., & Groff, T. D. (2016). Low-signal, coronagraphic wavefront estimation with Kalman filtering in the high contrast imaging testbed. In H. A. MacEwen, M. Lystrup, & G. G. Fazio (Eds.), Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave [99043F] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9904). SPIE. https://doi.org/10.1117/12.2233909