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Subreflector model depending on elevation for the Tianma 65 m Radio Telescope
Sun ZhengXiong1; Wang JinQing1; Chen Lan2
2016
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume16Issue:8Pages:119
AbstractA 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.
Keywordtelescopes methods: observational methods: data analysis
Language英语
Funding Project[National Natural Science Foundation of China]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/62969
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.Shanghai Institute Technol, Shanghai 201400, Peoples R China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sun ZhengXiong,Wang JinQing,Chen Lan. Subreflector model depending on elevation for the Tianma 65 m Radio Telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(8):119.
APA Sun ZhengXiong,Wang JinQing,&Chen Lan.(2016).Subreflector model depending on elevation for the Tianma 65 m Radio Telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(8),119.
MLA Sun ZhengXiong,et al."Subreflector model depending on elevation for the Tianma 65 m Radio Telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.8(2016):119.
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