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Inverse diffraction for the atmospheric imaging assembly in the Solar Dynamics Observatory. (English) Zbl 1328.85004

Summary: The Atmospheric Imaging Assembly in the Solar Dynamics Observatory provides full Sun images every 12s in each of 7 extreme ultraviolet passbands. However, for a significant amount of these images, saturation affects their most intense core, preventing scientists from a full exploitation of their physical meaning. In this paper we describe a mathematical and automatic procedure for the recovery of information in the primary saturation region based on a correlation/inversion analysis of the diffraction pattern associated to the telescope observations. Further, we suggest an interpolation-based method for determining the image background that allows the recovery of information also in the region of secondary saturation (blooming).

MSC:

85A04 General questions in astronomy and astrophysics
68U10 Computing methodologies for image processing
85A05 Galactic and stellar dynamics
83C10 Equations of motion in general relativity and gravitational theory
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