The solar high-resolution imager: coronagraph LYOT mission

Jean-Claude Vial; Xueyan Song; Philippe Lemaire; Alan H. Gabriel; Jean-Pierre Delaboudiniere; Karine Bocchialini; Serge L. Koutchmy; Philippe L. Lamy; Raymond Mercier; Marie Francoise Ravet; Frederic Auchere

doi:10.1117/12.460291

11 February 2003 The solar high-resolution imager - coronagraph LYOT mission

Jean-Claude Vial, Xueyan Song, Philippe Lemaire, Alan H. Gabriel, Jean-Pierre Delaboudiniere, Karine Bocchialini, Serge L. Koutchmy, Philippe L. Lamy, Raymond Mercier, Marie Francoise Ravet, Frederic Auchere

Author Affiliations +

Proceedings Volume 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics; (2003) https://doi.org/10.1117/12.460291
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The LYOT (LYman Orbiting Telescope) solar mission is proposed to be implemented on a micro-satellite of CNES (France) under phase A study. It includes two main instruments, which image the solar disk and the low corona up to 2.5 R_o in the H I Lyman-α line at 121.6 nm. The spatial resolution is about 1” for the disk and 2.5” for corona. It also carries an EIT-type telescope in the He II (30.4 nm) line. The coronagraph needs a super polished mirror at the entrance pupil to minimize the light scattering. Gratings and optical filters are used to select the Lyman-α wavelength. VUV cameras with 2048×2048 pixels record solar images up to every 10 seconds. The satellite operates at a high telemetry rate (more then 100 kb/s, after onboard data compression). The envisaged orbits are either geostationary or heliosynchronous. Possible launch dates could be end of 2006 - beginning of 2007.

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Jean-Claude Vial, Xueyan Song, Philippe Lemaire, Alan H. Gabriel, Jean-Pierre Delaboudiniere, Karine Bocchialini, Serge L. Koutchmy, Philippe L. Lamy, Raymond Mercier, Marie Francoise Ravet, and Frederic Auchere "The solar high-resolution imager - coronagraph LYOT mission", Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, (11 February 2003); https://doi.org/10.1117/12.460291

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