On-ground flat-field calibration of the Metis coronagraph onboard the Solar 
Orbiter ESA mission

Casini, C.; da Deppo, V.; Zuppella, P.; Chioetto, P.; Slemer, A.; Frassetto, F.; Romoli, M.; Landini, F.; Pancrazzi, M.; Andretta, V.; De Leo, Yara; Bemporad, A.; Fabi, M.; Fineschi, S.; Frassati, F.; Grimani, C.; Jerse, G.; Heerlein, Klaus; Liberatore, A.; Magli, E.; Naletto, G.; Nicolini, G.; Pelizzo, M.G.; Romano, P.; Sasso, C.; Spadaro, D.; Stangalini, M.; Straus, T.; Susino, R.; Teriaca, Luca; Uslenghi, M.; Casti, M.; Heinzel, P.; Volpicelli, A.

doi:10.1117/12.2599945

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On-ground flat-field calibration of the Metis coronagraph onboard the Solar Orbiter ESA mission

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De Leo, Yara
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Heerlein, Klaus
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Teriaca, Luca
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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Citation

Casini, C., da Deppo, V., Zuppella, P., Chioetto, P., Slemer, A., Frassetto, F., et al. (2021). On-ground flat-field calibration of the Metis coronagraph onboard the Solar Orbiter ESA mission. In Proceedings of SPIE. doi:10.1117/12.2599945.

Cite as: https://hdl.handle.net/21.11116/0000-000A-706B-0

Abstract

Solar Orbiter, launched on February 9th 2020, is an ESA/NASA mission conceived to study the Sun. This work presents
the embedded Metis coronagraph and its on-ground calibration in the 580-640 nm wavelength range using a flat field
panel. It provides a uniform illumination to evaluate the response of each pixel of the detector; and to characterize the
Field of View (FoV) of the coronagraph. Different images with different exposure times were acquired during the on-
ground calibration campaign. They were analyzed to verify the linearity response of the instrument and the requirements
for the FoV: the maximum area of the sky that Metis can acquire.