一种新型的汽车自动导航系统

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Journal of the Korean Astronomical Society Pub Date : 2015-06-30 DOI:10.5303/JKAS.2015.48.3.177
Nahyun Choi, W. Park, Hye-In Lee, Tae-Geun Ji, Y. Jeon, M. Im, S. Pak
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引用次数: 6

摘要

我们开发了一种新的早期宇宙类星体相机自动导向系统(cqueue)。cquan是美国麦克唐纳天文台2.1米奥托-斯特鲁夫望远镜(OST)上安装的光学CCD相机系统。新型自动制导系统与原系统的不同之处在于:它不再是原始系统的卡塞格伦焦点,而是附加在寻星瞄准镜上;它有自己的过滤系统,用于观察明亮的目标;采用新开发的自动导向程序CQUEAN自动导向包进行控制。取景器的范围要求非常宽的视野,但代价是聚光能力比光电望远镜差。根据星数数据和系统的极限星等,我们估计使用新的自动制导CCD相机在单视场下可观测到的恒星超过5.9颗。制作了一个适配器将系统连接到查找器范围。在2014年2月的试运行中,新的自动导向系统成功地引导了OST使用CQUEAN获取科学数据。从位置角分布可以看出,新自动制导系统对CQUEAN上恒星轮廓的FWHM和椭圆率分布与原自动制导系统的制导能力相似,但在较长曝光下的制导性能略差。结果表明,新型自动制导系统的总体制导性能与原系统相当。新的自动制导系统将用于第二代CQUEAN,但它可以用于OST的其他卡塞格伦仪器。
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A NEW AUTO-GUIDING SYSTEM FOR CQUEAN
We develop a new auto-guiding system for the Camera for QUasars in the EArly uNiverse (CQUEAN). CQUEAN is an optical CCD camera system attached to the 2.1-m Otto-Struve Telescope (OST) at McDonald Observatory, USA. The new auto-guiding system differs from the original one in the following: instead of the cassegrain focus of the OST, it is attached to the finder scope; it has its own filter system for observation of bright targets; and it is controlled with the CQUEAN Auto-guiding Package, a newly developed auto-guiding program. Finder scope commands a very wide field of view at the expense of poorer light gathering power than that of the OST. Based on the star count data and the limiting magnitude of the system, we estimate there are more than 5.9 observable stars with a single FOV using the new auto-guiding CCD camera. An adapter is made to attach the system to the finder scope. The new auto-guiding system successfully guided the OST to obtain science data with CQUEAN during the test run in 2014 February. The FWHM and ellipticity distributions of stellar profiles on CQUEAN, images guided with the new auto-guiding system, indicate similar guiding capabilities with the original auto-guiding system but with slightly poorer guiding performance at longer exposures, as indicated by the position angle distribution. We conclude that the new auto-guiding system has overall similar guiding performance to the original system. The new auto-guiding system will be used for the second generation CQUEAN, but it can be used for other cassegrain instruments of the OST.
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来源期刊
Journal of the Korean Astronomical Society
Journal of the Korean Astronomical Society 地学天文-天文与天体物理
CiteScore
1.30
自引率
10.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.
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