A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth axis

	A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth axis
	Kong, DQ 1; Wang, SG 1,2; Wang, JQ 3; Wang M(汪敏)4 ; Zhang, HB 1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2014-06
卷号	14 期号:6 页码:733-740
关键词	telescopes antennas pointing models
ISSN号	1674-4527
通讯作者	Kong, DQ (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
产权排序	第四完成单位
英文摘要	A new calibration model of a radio telescope that includes pointing error is presented, which considers nonlinear errors in the azimuth axis. For a large radio telescope, in particular for a telescope with a turntable, it is difficult to correct pointing errors using a traditional linear calibration model, because errors produced by the wheel-on-rail or center bearing structures are generally nonlinear. Fourier expansion is made for the oblique error and parameters describing the inclination direction along the azimuth axis based on the linear calibration model, and a new calibration model for pointing is derived. The new pointing model is applied to the 40 m radio telescope administered by Yunnan Observatories, which is a telescope that uses a turntable. The results show that this model can significantly reduce the residual systematic errors due to nonlinearity in the azimuth axis compared with the linear model.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/14/6/011/meta
语种	英语
WOS记录号	WOS:000337717100011
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5631]
专题	云南天文台_射电天文研究组
作者单位	1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.College of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China 3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China 4.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Kong, DQ,Wang, SG,Wang, JQ,et al. A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth axis[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2014,14(6):733-740.
APA	Kong, DQ,Wang, SG,Wang, JQ,Wang M,&Zhang, HB.(2014).A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth axis.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,14(6),733-740.
MLA	Kong, DQ,et al."A new calibration model for pointing a radio telescope that considers nonlinear errors in the azimuth axis".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 14.6(2014):733-740.