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Proceedings Paper • Open Access

The SiC hardware of the Sentinel-2 multi spectral instrument
Author(s): Michel Bougoin; Jérôme Lavenac

Paper Abstract

The Sentinel-2 mission is a major part of the GMES (Global Monitoring for Environment and Security) program which has been set up by the European Union, on a joint initiative with the European Space Agency. A pair of identical satellites will observe the earth from a sun-synchronous orbit at 786 km altitude.

Astrium is the prime contractor of the satellites and their payload. The MultiSpectral Instrument features a “all-SiC” TMA (Three Mirror Anastygmat) telescope. MSI will provide optical images in 13 spectral bands, in the visible and also the near infra-red range, with a 10 to 60 m resolution and a 290 km wide swath.

The Boostec® SiC material is used mainly for its high specific stiffness (Youngs modulus / density) and its high thermal stability (thermal conductivity / coefficient of thermal expansion) which allow to reduce the distortions induced by thermo-elastic stresses. Its high mechanical properties as well as the relevant technology enable to make not only the mirrors but also the structure which holds them and the elements of the focal plane (including some detectors packaging).

Due to the required large size, accuracy and shape complexity, developing and manufacturing some of these SiC parts required innovative manufacturing approach. It is reviewed in the present paper.

Paper Details

Date Published: 20 November 2017
PDF: 7 pages
Proc. SPIE 10564, International Conference on Space Optics — ICSO 2012, 1056411 (20 November 2017); doi: 10.1117/12.2309175
Show Author Affiliations
Michel Bougoin, BOOSTEC (France)
Jérôme Lavenac, BOOSTEC (France)

Published in SPIE Proceedings Vol. 10564:
International Conference on Space Optics — ICSO 2012
Bruno Cugny; Errico Armandillo; Nikos Karafolas, Editor(s)

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