Subreflector model depending on elevation for the Tianma 65 m Radio Telescope
文献类型：期刊论文
| 作者 | Sun ZhengXiong1; Wang JinQing1; Chen Lan2 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2016 |
| 卷号 | 16期号:8页码:119 |
| 关键词 | telescopes methods: observational methods: data analysis |
| ISSN号 | 1674-4527 |
| 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. |
| 资助项目 | [National Natural Science Foundation of China] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62968]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.Shanghai Institute Technol, Shanghai 201400, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：国家天文台
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