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南山26米射电望远镜轨道高差测量及其对指向精度的影响
Alternative TitleMeasurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy
温浩兴1,2,3; 许谦1,2; 王娜1,2
2019-04
Source Publication天文研究与技术
ISSN1672-7673
Volume16Issue:2Pages:158-166
Contribution Rank1
Abstract轮轨式天线的轨道作为承载整个天线重量的基础,其精度好坏将直接影响天线在方位方向运转的平稳性,进而引起天线轴系偏差从而影响天线指向精度。本文介绍改造后的乌鲁木齐南山26m天线(NSRT:Nanshan Radio Telescope)轨道结构以及轨道高差测量,并建立天线在不同方位、俯仰角下轨道高差引起天线指向偏差的数学模型。利用“十字扫描”法实测多颗标准源在相应位置的指向数据,并通过高斯拟合得到指向偏差。通过分析可知轨道高差引起的指向偏差经过修正可以提高天线指向精度。
Other AbstractThe track of wheel on track antenna is the important foundation which carries the whole antenna weight; its precision directly influences the operation of the antenna in azimuth direction stability, causing the shafting error and finally influences the antenna pointing accuracy. This paper introduces the reconstructed Nanshan Radio Telescope ( NSRT ) 26m antenna track structure and track unevenness measurement, and establishes the mathematical model of antenna pointing error caused by the track unevenness of the antenna under different azimuth and elevation angle. The cross scanning method is used to measure the pointing data of multiple standard radio sources in corresponding positions, and the pointing error is obtained through Gauss fitting method. Through analysis, we can see that the pointing error caused by track unevenness is corrected, and the antenna pointing accuracy can be improved.
Keyword轨道高差 26m天线(NSRT) 整体轨道 十字扫描 指向偏差
DOI10.14005/j.cnki.issn1672-7673.20180601.001
Indexed ByCSCD
Language中文
CSCD IDCSCD:6470962
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/3179
Collection射电天文研究室_天线技术实验室
Affiliation1.中国科学院新疆天文台,新疆乌鲁木齐830011;
2.中国科学院射电天文重点实验室,江苏南京210008;
3.中国科学院大学,北京100049
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
温浩兴,许谦,王娜. 南山26米射电望远镜轨道高差测量及其对指向精度的影响[J]. 天文研究与技术,2019,16(2):158-166.
APA 温浩兴,许谦,&王娜.(2019).南山26米射电望远镜轨道高差测量及其对指向精度的影响.天文研究与技术,16(2),158-166.
MLA 温浩兴,et al."南山26米射电望远镜轨道高差测量及其对指向精度的影响".天文研究与技术 16.2(2019):158-166.
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