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Proceedings Paper

Development of a correlation tracker system for the New Solar Telescope
Author(s): Seonghwan Choi; Jakyoung Nah; Yong-Jae Moon; Haimin Wang; Roy Coulter
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Paper Abstract

In this paper, we report on the development of a correlation tracker system for the New Solar Telescope (NST). It consists of three sub-systems: a tip-tilt mirror unit, a camera unit, and a control unit. Its software has been developed via Microsoft Visual C++, which enables us to take images from the high-speed CMOS camera in order to measure the image motions induced by atmospheric turbulence by using SAD algorithm and 2-D FFT cross-correlation, and to control the high-dynamics Piezo tip-tilt mirror for tip-tilt correction. We adopted the SIMD technology and parallel programming technology based on the Intel Core 2 Quad processor without any additional processing system (FPGA or DSP) for high-speed performance. As a result, we can make a tip-tilt correction with about seven hundreds of Hz in a closed loop mode. The prototype system has been successfully developed in a laboratory and will be installed on the NST.

Paper Details

Date Published: 15 July 2008
PDF: 8 pages
Proc. SPIE 7015, Adaptive Optics Systems, 701553 (15 July 2008); doi: 10.1117/12.788661
Show Author Affiliations
Seonghwan Choi, Korea Astronomy and Space Science Institute (South Korea)
Kyung-Hee Univ. (South Korea)
Jakyoung Nah, Korea Astronomy and Space Science Institute (South Korea)
Yong-Jae Moon, Kyung-Hee Univ. (South Korea)
Haimin Wang, New Jersey Institute of Technology (United States)
Roy Coulter, Big Bear Solar Observatory (United States)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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