A model of geometric delay in Space VLBI

	A model of geometric delay in Space VLBI
	Liao, Shi-Long 1,2; Tang, Zheng-Hong 1; Qi, Zhao-Xiang 1
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2014-08-01
卷号	14 期号:8 页码:1029-1036
关键词	astrometry interferometric analytical
英文摘要	A model which includes the relativistic effect is derived that can be applied to space very long baseline interferometry (SVLBI) while taking observations of sources at infinite distance. In SVLBI, where one station is on a spacecraft, the length of the baseline and the orbiting station's maximum speed in an elliptical orbit around the Earth is much larger than the ground-based VLBI, which leads to a larger delay and higher delay rate. The delay models inside VLBI correlators are usually expressed as fifth-order polynomials during a limited time interval, which are evaluated by firmware in the correlator and track delays in the interferometer over the limited time interval. The higher SVLBI delay rate requires more accurate polynomial fitting and evaluation, as well as more frequent model updates.
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
语种	英语
WOS记录号	WOS:000340698100013
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/16234]
专题	上海天文台_天文技术研究室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liao, Shi-Long,Tang, Zheng-Hong,Qi, Zhao-Xiang. A model of geometric delay in Space VLBI[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2014,14(8):1029-1036.
APA	Liao, Shi-Long,Tang, Zheng-Hong,&Qi, Zhao-Xiang.(2014).A model of geometric delay in Space VLBI.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,14(8),1029-1036.
MLA	Liao, Shi-Long,et al."A model of geometric delay in Space VLBI".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 14.8(2014):1029-1036.