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Proceedings Paper

Image stabilization system on SOLAR-B Solar Optical Telescope
Author(s): Toshifumi Shimizu; Shin'ichi Nagata; Chris Edwards; Theodore Tarbell; Yasuhiro Kashiwagi; Kazuhide Kodeki; Osamu Ito; Hiroyuki Miyagawa; Masayuki Nagase; Syunsaku Inoue; Kazumasa Kaneko; Yasushi Sakamoto; Kiyoshi Ichimoto; Saku Tsuneta; Shiro Miki; Makoto Endo; Masaki Tabata; Toshitaka Nakaoji; Keiichi Matsuzaki; Ken Kobayashi; Masashi Otsubo; Yoshinori Suematsu; Kazuyoshi Kumagai; Motokazu Noguchi; Tomonori Tamura; Masao Nakagiri
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Paper Abstract

Extremely stable pointing of the telescope is required for images on the CCD cameras to accurately measure the nature of magnetic field on the sun. An image stabilization system is installed to the Solar Optical Telescope onboard SOLAR-B, which stabilizes images on the focal plane CCD detectors in the frequency range lower than about 20Hz. The system consists of a correlation tracker and a piezo-based tip-tilt mirror with servo control electronics. The correlation tracker is a high speed CCD camera with a correlation algorithm on the flight computer, producing a pointing error from series of solar granule images. Servo control electronics drives three piezo actuators in the tip-tilt mirror. A unique function in the servo control electronics can put sine wave form signals in the servo loop, allowing us to diagnose the transfer function of the servo loop even on orbit. The image stabilization system has been jointly developed by collaboration of National Astronomical Observatory of Japan/Mitsubishi Electronic Corp. and Lockheed Martin Advanced Technology Center Solar and Astrophysics Laboratory. Flight model was fabricated in summer 2003, and we measured the system performance of the flight model on a laboratory environment in September 2003, confirming that the servo stability within 0-20 Hz bandwidth is 0.001-0.002 arcsec rms level on the sun.

Paper Details

Date Published: 12 October 2004
PDF: 8 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551368
Show Author Affiliations
Toshifumi Shimizu, National Astronomical Observatory of Japan (Japan)
Shin'ichi Nagata, National Astronomical Observatory of Japan (Japan)
Chris Edwards, Lockheed Martin Advanced Technology Ctr. (United States)
Theodore Tarbell, Lockheed Martin Advanced Technology Ctr. (United States)
Yasuhiro Kashiwagi, Mitsubishi Electric Corp. (Japan)
Kazuhide Kodeki, Mitsubishi Electric Corp. (Japan)
Osamu Ito, Mitsubishi Electric Corp. (Japan)
Hiroyuki Miyagawa, Systems Engineering Consultants Corp. (Japan)
Masayuki Nagase, Systems Engineering Consultants Corp. (Japan)
Syunsaku Inoue, Mitsubishi Space Software Corp. (Japan)
Kazumasa Kaneko, Mitsubishi Space Software Corp. (Japan)
Yasushi Sakamoto, National Astronomical Observatory of Japan (Japan)
Univ. of Tokyo (Japan)
Kiyoshi Ichimoto, National Astronomical Observatory of Japan (Japan)
Saku Tsuneta, National Astronomical Observatory of Japan (Japan)
Shiro Miki, Mitsubishi Electric Corp. (Japan)
Makoto Endo, Mitsubishi Electric Corp. (Japan)
Masaki Tabata, Mitsubishi Electric Corp. (Japan)
Toshitaka Nakaoji, Mitsubishi Electric Corp. (Japan)
Keiichi Matsuzaki, ISAS/Japan Aerospace Exploration Agency (Japan)
Ken Kobayashi, National Astronomical Observatory of Japan (Japan)
Univ. of Tokyo (Japan)
Masashi Otsubo, National Astronomical Observatory of Japan (Japan)
Yoshinori Suematsu, National Astronomical Observatory of Japan (Japan)
Kazuyoshi Kumagai, National Astronomical Observatory of Japan (Japan)
Motokazu Noguchi, National Astronomical Observatory of Japan (Japan)
Tomonori Tamura, National Astronomical Observatory of Japan (Japan)
Masao Nakagiri, National Astronomical Observatory of Japan (Japan)


Published in SPIE Proceedings Vol. 5487:
Optical, Infrared, and Millimeter Space Telescopes
John C. Mather, Editor(s)

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