Inverse diffraction for the Atmospheric Imaging Assembly in the Solar Dynamics Observatory. (17th August 2015)

• Record Type: Journal Article
• Authors: Torre, G; Schwartz, R A; Benvenuto, F; Massone, A M; Piana, M
• Is Part Of: Inverse problems. Volume 31:Number 9(2015:Sep.)
• Publication Date: 2015-08-17
• Subjects: Solar Dynamics Observatory -- inverse diffraction -- astronomical imaging -- expectation maximization; Inverse problems (Differential equations) -- Periodicals; 515.357
• DOI: 10.1088/0266-5611/31/9/095006
• Languages: English
• ISSNs: 0266-5611

Abstract

Abstract: The Atmospheric Imaging Assembly in the Solar Dynamics Observatory provides full Sun images every 12 s 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).