Acquirement and analysis of Doppler ionograms with high accuracy in the ionogram mode from Digisonde 256

doi:10.1029/2002RS002779

	Acquirement and analysis of Doppler ionograms with high accuracy in the ionogram mode from Digisonde 256
	Yuan, ZG; Ning, BQ; Wan, WX; Yuan, H
刊名	RADIO SCIENCE
	2004-04-22
卷号	39 期号:2
关键词	Doppler Frequency Shift Ionogram Digisonde Traveling Ionospheric Disturbance
ISSN号	0048-6604
DOI	10.1029/2002RS002779
文献子类	Article
英文摘要	The Doppler frequency shift of the radio echo reflected from the ionosphere is an important characteristic to measure ionospheric movements. Generally, for the Digisonde 256 digital ionosonde, a Doppler frequency shift with high resolution can be obtained in the drift mode. In this mode, the height profile of ionospheric disturbances cannot be acquired due to only a few sounding frequencies. In the routine ionogram mode, the profile of electron density is displayed, but the resolution of the recorded Doppler spectral lines is too low to detect precisely the ionospheric disturbances. This paper introduces a method to acquire a Doppler ionogram with high accuracy in the ionogram mode for Digisonde 256. In the condition of a narrowband ionospheric echo in the range bin, through converting the 16 channel data from the frequency domain to the time domain by Inverse Discrete Fourier Transform (IDFT) and estimating the Doppler frequency shift by a least squares method, a Doppler ionogram with high accuracy can be acquired. In order to validate the method, some experiments have been carried out with the Digisonde 256 at Wuhan Ionospheric Observatory. Based on an event of the Traveling Ionospheric Disturbance (TID), we describe how to use these derived Doppler ionograms to study the ionospheric disturbances. Those observation results show that the present method is very useful in the experimental investigations of ionospheric disturbances.
WOS关键词	TRAVELING IONOSPHERIC DISTURBANCES ; ATMOSPHERIC GRAVITY-WAVES ; VELOCITY ; DYNASONDE
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:000221088200001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64431]
专题	中国科学院地质与地球物理研究所
通讯作者	Yuan, ZG
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Yuan, ZG,Ning, BQ,Wan, WX,et al. Acquirement and analysis of Doppler ionograms with high accuracy in the ionogram mode from Digisonde 256[J]. RADIO SCIENCE,2004,39(2).
APA	Yuan, ZG,Ning, BQ,Wan, WX,&Yuan, H.(2004).Acquirement and analysis of Doppler ionograms with high accuracy in the ionogram mode from Digisonde 256.RADIO SCIENCE,39(2).
MLA	Yuan, ZG,et al."Acquirement and analysis of Doppler ionograms with high accuracy in the ionogram mode from Digisonde 256".RADIO SCIENCE 39.2(2004).