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6 July 2018 Tip-tilt performance test of FSMP for development of the GMT FSM
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The Giant Magellan Telescope (GMT) will be equipped with two Gregorian secondary mirrors: a fast-steering mirror (FSM) system for seeing-limited operations and an adaptive secondary mirror (ASM) for adaptive optics observing modes. The FSM has an effective diameter of 3.2 m and is comprised of seven 1.1 m diameter circular segments, which are conjugated 1:1 to the seven 8.4m segments of the primary. Each FSM segment has a tip-tilt capability for fast guiding to attenuate telescope wind shake and jitter. To verify the tip-tilt performance at various orientations, we performed tiptilt tests using a conceptual prototype of the FSM (FSMP) which was developed at KASI for R&D of key technologies for FSM. In this paper, we present configuration, methodology, results, and lessons from the FSMP test which will be considered in the development of FSM.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sanghyuk Kim, Chang-Hee Kim, Ueejeong Jeong, Sungho Lee, Won Gi Lee, Chan-Hee Lee, Il-Kwon Moon, Jeong-Yeol Han, Yunjong Kim, Bongkon Moon, Myung Kyu Cho, Byeong-Gon Park, Chan Park, Ho-Sang Kim, Paul B. Gardner, Robert J. Bernier, Frank Groark, and Hugo Chiquito "Tip-tilt performance test of FSMP for development of the GMT FSM", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107003P (6 July 2018);

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