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Proceedings Paper

The improvement of CCD auto-guiding system for 2.5m telescope
Author(s): Liyan Chen; Zhenchao Zhang; Hang Wang
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Paper Abstract

The CCD Auto-Guiding Star System is a significant part in the telescope control system for minimizing the tracking errors, and acquiring high-resolution data. In this paper, the improved algorithms of the off-axis CCD Auto-Guiding Star System is designed and applied. Especially the de-rotator algorithm is added for the large-field Alt-Az Telescope to keep stars at original positions. The software that can communicate with the CCD camera is designed to collect, analyze and process data, and then sent data to Alt-Az control system in real time less than 160ms. The algorithms to calculate centriod of stars are novel. The experimental results were high-resolution and reliable for system, the RMS of star offset vector can arrive 0.03 pixel. In addition, experiments showed that the software could work steadily in long time. Now the CCD Auto-guiding software has been applied on the f/8 reflecting Alt-Az telescope with 2.5m aperture, 1-degree field of view.

Paper Details

Date Published: 24 September 2012
PDF: 6 pages
Proc. SPIE 8451, Software and Cyberinfrastructure for Astronomy II, 84512K (24 September 2012); doi: 10.1117/12.925642
Show Author Affiliations
Liyan Chen, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Zhenchao Zhang, Nanjing Institute of Astronomical Optics & Technology (China)
Hang Wang, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 8451:
Software and Cyberinfrastructure for Astronomy II
Nicole M. Radziwill; Gianluca Chiozzi, Editor(s)

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