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  Image restoration of solar spectra

van Noort, M. (2018). Image restoration of solar spectra. Astronomy and Astrophysics, 608: A76. doi:10.1051/0004-6361/201731339.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-1C0F-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-1C26-6
Genre: Journal Article

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 Creators:
van Noort, Michiel1, Author              
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 MPIS_GROUPS: Sun and Heliosphere: Solar Lower Atmosphere and Magnetism
 Abstract: Context. When recording spectra from the ground, atmospheric turbulence causes degradation of the spatial resolution. Aims. We present a data reduction method that restores the spatial resolution of the spectra to their undegraded state. Methods. By assuming that the point spread function (PSF) estimated from a strictly synchronized, broadband slit-jaw camera is the same as the PSF that spatially degraded the spectra, we can quantify what linear combination of undegraded spectra is present in each degraded data point. Results. The set of equations obtained in this way is found to be generally well-conditioned and sufficiently diagonal to be solved using an iterative linear solver. The resulting solution has regained a spatial resolution comparable to that of the restored slit-jaw images. Conclusions. We have developed a new image restoration method for the restoration of ground-based spectral data over a large field of view. The method builds on the PSF information recovered by the MOMFBD code and typically reaches a spatial resolution comparable to that of the broadband slit-jaw images used to recover the PSF.

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Language(s): eng - English
 Dates: 2018-04-102018
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1051/0004-6361/201731339
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
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Publ. Info: Berlin : Springer-Verlag
Pages: - Volume / Issue: 608 Sequence Number: A76 Start / End Page: - Identifier: ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1