Subreflector model depending on elevation for the Tianma 65 m Radio Telescope

doi:10.1088/1674-4527/16/8/119

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	Subreflector model depending on elevation for the Tianma 65 m Radio Telescope
	Sun, Zheng-Xiong 1; Wang, Jin-Qing 1; Chen, Lan 2
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2016-08-01
卷号	16 期号:8 页码:119-U16
关键词	Telescopes Methods: Observational Methods: Data Analysis
ISSN号	1674-4527
DOI	10.1088/1674-4527/16/8/119
英文摘要	A subreflector adjustment system for the Tianma 65 m radio telescope, administered by Shanghai Astronomical Observatory, has been installed to compensate for gravitational deformation of the main reflector and the structure supporting the subreflector. The position and attitude of the subreflector are variable in order to improve the efficiency at different elevations. The subreflector model has the goal of improving the antenna's performance. A new fitting formulation which is different from the traditional formulation is proposed to reduce the fitting error in the Y direction. The only difference in the subreflector models of the 65 m radio telescope is the bias of a constant term in the Z direction. We have investigated the effect of movements of the subreflector on the pointing of the antenna. The results of these performance measurements made by moving the antenna in elevation show that the subreflector model can effectively improve the efficiency of the 65 m radio telescope at each elevation. An antenna efficiency of about 60% at the Ku band is reached in the whole angular range of elevation.
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000381832700002
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32755]
专题	中国科学院上海天文台
通讯作者	Sun, Zheng-Xiong
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Shanghai Inst Technol, Shanghai 201400, Peoples R China
推荐引用方式 GB/T 7714	Sun, Zheng-Xiong,Wang, Jin-Qing,Chen, Lan. Subreflector model depending on elevation for the Tianma 65 m Radio Telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(8):119-U16.
APA	Sun, Zheng-Xiong,Wang, Jin-Qing,&Chen, Lan.(2016).Subreflector model depending on elevation for the Tianma 65 m Radio Telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(8),119-U16.
MLA	Sun, Zheng-Xiong,et al."Subreflector model depending on elevation for the Tianma 65 m Radio Telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.8(2016):119-U16.