Development of a straylight diagnostics tool for the MOTA OGSE

Mathieu Guilhem; Laurie Capobianco-Peigné; Charlène Mercier; Xavier Joffrin

doi:10.1117/12.2691038

12 July 2023 Development of a straylight diagnostics tool for the MOTA OGSE

Mathieu Guilhem, Laurie Capobianco-Peigné, Charlène Mercier, Xavier Joffrin

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Proceedings Volume 12777, International Conference on Space Optics — ICSO 2022; 127775R (2023) https://doi.org/10.1117/12.2691038
Event: International Conference on Space Optics — ICSO 2022, 2022, Dubrovnik, Croatia

Abstract

Earth Observation instruments under ESA responsibility usually have very tight requirements concerning straylight performance. To quantify the straylight level of the instruments some dedicated Optical Ground Support Equipment (OGSE) are developed [1]. Particularly in the case of the MTG-FCI, the straylight is characterized using the MOTA (Multi Optical Test Assembly) OGSE [2] operated by Thales Alenia Space in Cannes, France. The acceptable FCI straylight level is very stringent thus it is important to ensure the level of straylight of such OGSE stays below a certain level. This paper presents a simple setup, inspired by the “external occultation coronagraph” architecture, capable of directly measuring the OGSE straylight level in typical NUST (Non-Uniform Scene Test) configuration.

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Mathieu Guilhem, Laurie Capobianco-Peigné, Charlène Mercier, and Xavier Joffrin "Development of a straylight diagnostics tool for the MOTA OGSE", Proc. SPIE 12777, International Conference on Space Optics — ICSO 2022, 127775R (12 July 2023); https://doi.org/10.1117/12.2691038

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KEYWORDS

Diffraction

Simulations

Astronomical imaging

Equipment

Scattering

Design and modelling

Imaging systems

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