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A Comparison of Several Image Locating Algorithms in Astronomical Instruments

机译:天文仪器中几种图像定位算法的比较

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摘要

In astronomical observations at optical wavelengths, a fast image tracking system can be adopted to reduce the effects of the atmospheric seeing and telescopic tracking error, and therefore improve the observing efficiency. Aiming at the need of astronomical observations, totally 5 kinds of algorithms in two categories were selected to make a comparative study on their accuracies and stabilities under different noise conditions by both numerical experiment and laboratory test. The results indicate that the normalized cross-correlation method and barycenter method have not only a higher accuracy but also a better reliability against interferences, they will be applied to the high-resolution spectrograph of the Xinglong 2.16 m telescope and the scientifi{ligature}c instruments of the SONG (Stellar Observations Network Group) project, respectively.
机译:在光学波长的天文观测中,可以采用快速图像跟踪系统来减少大气观测和望远镜跟踪误差的影响,从而提高观测效率。针对天文观测的需要,通过数值试验和实验室试验,共选择了两类五种算法对不同噪声条件下的精度和稳定性进行了比较研究。结果表明,归一化互相关法和重心法不仅具有较高的精度,而且具有较好的抗干扰可靠性,将被应用于兴隆2.16 m望远镜的高分辨率光谱仪和科学{c} SONG(星际观测网络小组)项目的仪器。

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