Concept of an Experimental Ultralong-Wavelength Radio Array

doi:10.1029/2019RS006806

CORC > 国家天文台 > 中国科学院国家天文台

	Concept of an Experimental Ultralong-Wavelength Radio Array
	Chen, Linjie 1; Yan, Yihua 1,2
刊名	RADIO SCIENCE
	2019-07-01
卷号	54 期号:7 页码:660-670
关键词	ultralong wavelengths radio array radio astronomy
ISSN号	0048-6604
DOI	10.1029/2019RS006806
英文摘要	The Ultralong-Wavelength (ULW) regime of longer than 10m (corresponding to frequencies below 30MHz) remains as the last virtually unexplored window in radio astronomy and is presently attracting considerable attention as an area of potentially rewarding studies. However, the opaqueness of the Earth's ionosphere makes the ULW celestial radio emission very difficult to detect with ground-based instrumentation. The impact of the ionosphere on ULW radio emission depends on the solar cycle activities and varies with time. In addition, the ULW spectrum region is densely populated by intensive artificial radio frequency interference. An obvious solution of these problems is to place an ULW radio telescope in space. However, this solution is expensive and poses nonnegligible technological challenges. An alternative approach is triggered by recent studies showing that the period of post 2020 will be most suitable for exploratory ground-based ULW radio observations due to the expected calm state of the ionosphere; the ionospheric cutoff frequency could be well below 10MHz, even in the day time. In anticipation of this upcoming opportunity, we propose and present in this paper a concept of an experimental ULW radio array, with the intention of setting it up in Inner Mongolia, China. This ULW facility will use the infrastructure of the currently operational Mingantu spectral radio heliograph. The proposed ULW array covers the frequency range from 1 to 72MHz. This experimental array will be used for exploratory studies of celestial radio emission in the ULW range of the spectrum.
资助项目	National Natural Science Foundation of China (NSFC)[11573043] ; National Natural Science Foundation of China (NSFC)[11203042] ; National Natural Science Foundation of China (NSFC)[11790305] ; National Natural Science Foundation of China (NSFC)[11433006] ; National Astronomical Observatories, Chinese Academy of Sciences
WOS关键词	LOFAR
WOS研究方向	Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Remote Sensing ; Telecommunications
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000480786900012
资助机构	National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/27387]
专题	中国科学院国家天文台
通讯作者	Chen, Linjie
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Linjie,Yan, Yihua. Concept of an Experimental Ultralong-Wavelength Radio Array[J]. RADIO SCIENCE,2019,54(7):660-670.
APA	Chen, Linjie,&Yan, Yihua.(2019).Concept of an Experimental Ultralong-Wavelength Radio Array.RADIO SCIENCE,54(7),660-670.
MLA	Chen, Linjie,et al."Concept of an Experimental Ultralong-Wavelength Radio Array".RADIO SCIENCE 54.7(2019):660-670.