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Proceedings Paper • Open Access

Pointing stability of Hinode and requirements for the next Solar mission Solar-C
Author(s): Y. Katsukawa; Y. Masada; T. Shimizu; S. Sakai; K. Ichimoto

Paper Abstract

It is essential to achieve fine pointing stability in a space mission aiming for high resolutional observations. In a future Japanese solar mission SOLAR-C, which is a successor of the HINODE (SOLAR-B) mission, we set targets of angular resolution better than 0.1 arcsec in the visible light and better than 0.2 - 0.5 arcsec in EUV and X-rays. These resolutions are twice to five times better than those of corresponding instruments onboard HINODE. To identify critical items to achieve the requirements of the pointing stability in SOLAR-C, we assessed in-flight performance of the pointing stability of HINODE that achieved the highest pointing stability in Japanese space missions. We realized that one of the critical items that have to be improved in SOLAR-C is performance of the attitude stability near the upper limit of the frequency range of the attitude control system. The stability of 0.1 arcsec (3σ) is required in the EUV and X-ray telescopes of SOLAR-C while the HINODE performance is slightly worse than the requirement. The visible light telescope of HINODE is equipped with an image stabilization system inside the telescope, which achieved the stability of 0.03 arcsec (3σ) by suppressing the attitude jitter in the frequency range lower than 10 Hz. For further improvement, it is expected to suppress disturbances induced by resonance between the telescope structures and disturbances of momentum wheels and mechanical gyros in the frequency range higher than 100 Hz.

Paper Details

Date Published: 20 November 2017
PDF: 6 pages
Proc. SPIE 10565, International Conference on Space Optics — ICSO 2010, 1056528 (20 November 2017); doi: 10.1117/12.2309171
Show Author Affiliations
Y. Katsukawa, National Astronomical Observatory of Japan (Japan)
Y. Masada, Kobe Univ. (Japan)
T. Shimizu, Japan Aerospace Exploration Agency (Japan)
S. Sakai, Japan Aerospace Exploration Agency (Japan)
K. Ichimoto, Kyoto Univ. Hida Observatory (Japan)

Published in SPIE Proceedings Vol. 10565:
International Conference on Space Optics — ICSO 2010
Errico Armandillo; Bruno Cugny; Nikos Karafolas, Editor(s)

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