In-flight calibration of Metis coronagraph on board of Solar Orbiter

A. Liberatore; S. Fineschi; M. Casti; G. Capobianco; M. Romoli; V. Andretta; A. Bemporad; V. Da Deppo; Y. De Leo; M. Fabi; F. Frassetto; C. Grimani; K. Heerlein; P. Heinzel; G. Jerse; F. Landini; E. Magli; G. Naletto; G. Nicolini; M. Pancrazzi; M. G. Pelizzo; P. Romano; C. Sasso; A. Slemer; D. Spadaro; T. Straus; R. Susino; L. Teriaca; M. Uslenghi; C. A. Volpicelli; P. Zuppella

doi:10.1117/12.2599646

11 June 2021 In-flight calibration of Metis coronagraph on board of Solar Orbiter

A. Liberatore, S. Fineschi, M. Casti, G. Capobianco, M. Romoli, V. Andretta, A. Bemporad, V. Da Deppo, Y. De Leo, M. Fabi, F. Frassetto, C. Grimani, K. Heerlein, P. Heinzel, G. Jerse, F. Landini, E. Magli, G. Naletto, G. Nicolini, M. Pancrazzi, M. G. Pelizzo, P. Romano, C. Sasso, A. Slemer, D. Spadaro, T. Straus, R. Susino, L. Teriaca, M. Uslenghi, C. A. Volpicelli, P. Zuppella

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Proceedings Volume 11852, International Conference on Space Optics — ICSO 2020; 1185248 (2021) https://doi.org/10.1117/12.2599646
Event: International Conference on Space Optics — ICSO 2021, 2021, Online Only

Abstract

Metis coronagraph is one of the remote-sensing instruments of the Solar Orbiter mission launched at the begin of 2020. The mission profile will allow for the first time the remote-sensing observation of the Sun from a very close distance and increasing the latitude with respect to the ecliptic plane. In particular, Metis is aimed at the overall characterization and study of the solar corona and solar wind. Metis instrument acquires images of the solar corona in two different wavelengths simultaneously; ultraviolet (UV) and visible-light (VL). The VL channel includes a polarimeter with an electro-optically modulating Liquid Crystal Variable Retarder (LCVR) to measure the linearly polarized brighness pB) of the K-corona. This paper presents part of the in-flight calibration results for both wavelength channels together with a comparison with on-ground calibrations. The orientation of the K-corona linear polarization was used for the in-flight calibration of the Metis polarimeter. This paper describes the correction of the on-ground VL vignetting function after the in-flight adjustment of the internal occulter. The same vignetting function was adaptated to the UV channel.

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A. Liberatore, S. Fineschi, M. Casti, G. Capobianco, M. Romoli, V. Andretta, A. Bemporad, V. Da Deppo, Y. De Leo, M. Fabi, F. Frassetto, C. Grimani, K. Heerlein, P. Heinzel, G. Jerse, F. Landini, E. Magli, G. Naletto, G. Nicolini, M. Pancrazzi, M. G. Pelizzo, P. Romano, C. Sasso, A. Slemer, D. Spadaro, T. Straus, R. Susino, L. Teriaca, M. Uslenghi, C. A. Volpicelli, and P. Zuppella "In-flight calibration of Metis coronagraph on board of Solar Orbiter", Proc. SPIE 11852, International Conference on Space Optics — ICSO 2020, 1185248 (11 June 2021); https://doi.org/10.1117/12.2599646

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