An asymmetry correction method for ionospheric radio occultation

	An asymmetry correction method for ionospheric radio occultation
	Wu, X. C. ; Hu, X. ; Gong, X. Y. ; Zhang, X. X. ; Wang, X.
刊名	Journal of Geophysical Research-Space Physics
	2009
卷号	114 页码:A03304
关键词	electron-density profiles global positioning system abel inversion champ model improvement validation atmosphere
ISSN号	0148-0227
通讯作者	北京8701信箱
英文摘要	The approximation of spherical symmetry of electron density is the main error source in the inversion of ionospheric radio occultation (IRO). The study in this paper shows that only even terms of the asymmetry contribute to the inversion error. An asymmetry factor for IRO is defined, and it is approximately equal to the relative error of the inversion result. The characteristics of the asymmetry factor are studied and are shown in the following: (1) the absolute value of asymmetry factor (AVAF) of a zonal occultation is much smaller than that of the meridian one; (2) higher solar activity corresponds to larger AVAF; (3) AVAF is largest in winter, second largest in equinox season, and smallest in summer; and (4) generally, AVAF at middle geomagnetic latitudes is smaller than at other latitudes, and it is large at the magnetic equator, the crest region, and the middle-latitude trough. The asymmetry factor is applied to correct the retrieved electron density, and the inversion error is greatly reduced.
学科主题	空间环境
收录类别	SCI
原文出处	http://www.agu.org/pubs/crossref/2009/2008JA013025.shtml
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/302]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	Wu, X. C.,Hu, X.,Gong, X. Y.,et al. An asymmetry correction method for ionospheric radio occultation[J]. Journal of Geophysical Research-Space Physics,2009,114:A03304.
APA	Wu, X. C.,Hu, X.,Gong, X. Y.,Zhang, X. X.,&Wang, X..(2009).An asymmetry correction method for ionospheric radio occultation.Journal of Geophysical Research-Space Physics,114,A03304.
MLA	Wu, X. C.,et al."An asymmetry correction method for ionospheric radio occultation".Journal of Geophysical Research-Space Physics 114(2009):A03304.