15 July 2016 High precision tracking method for solar telescopes
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Abstract
A high-precision real-time tracking method for solar telescopes was introduced in this paper based on the barycenter of full-disk solar images algorithm. To make sure the calculation was accurate and reliable, a series of strictly logic limits were set, such as setting gray threshold, judging the displacement of the barycenter and measuring the deviation from a perfect disk. A closed-loop control system was designed in the method. We located the barycenter of the full-disk images which recorded by large array CCD image sensor in real time and eliminate noise caused by bad weather, such as clouds and fog. The displacement of the barycenter was analyzed and transferred into control signal drove the motor to adjust the axis of telescope. An Ethernet interface was also provided for remote control. In the observation, the precision of this new method was better than 1″/30 minutes.
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Jingjing Guo, Jingjing Guo, Yunfei Yang, Yunfei Yang, Song Feng, Song Feng, Kanfan Ji, Kanfan Ji, Jiaben Lin, Jiaben Lin, Zhen Zeng, Zhen Zeng, Bingxiang Wang, Bingxiang Wang, } "High precision tracking method for solar telescopes", Proc. SPIE 9910, Observatory Operations: Strategies, Processes, and Systems VI, 991028 (15 July 2016); doi: 10.1117/12.2231558; https://doi.org/10.1117/12.2231558
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