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Pade Approximant ELF VED Fields in the Earth-Ionosphere Cavity

文献类型：期刊论文

作者Liang, PengFei1,2,3; Di, QingYun1,2,3; Fu, Changmin1,2,3; Wang, Ruo1,2,3; Fan, Jianbao1,2,3; Gao, Ya1,2,3
刊名RADIO SCIENCE
出版日期2021-07-01
卷号56期号:7页码:10
关键词Electromagnetic fields Pade approximation spherical coordinate electri dipole
ISSN号0048-6604
DOI10.1029/2020RS007226
英文摘要Electromagnetic (EM) fields in the extremely low-frequency (ELF) domain that can be excited by the vertical electric dipole (VED) and propagated in the Earth-ionosphere spherical cavity have received tremendous attention owing to their exploitation in many fields such as communication, earthquake prediction, and geophysical investigations. Some researchers use the planar model and curvature correction terms to simulate EM fields in a spherical cavity, while others directly solve the differential functions and estimate the excited EM fields represented by spherical Bessel and associated Legendre functions. Regarding the divergence problem of a series when simulating EM fields, several numerical methods are available such as Watson transformation method, W. K. B. J method, and speeding algorithm. In this study, Pade approximant is utilized to estimate EM fields propagating in the Earth-ionosphere spherical cavity, where new asymptotic expansions of spherical Bessel functions are introduced for estimating their products for high orders. These EM fields are then interpreted as a sum of the dominant incident fields and the increase of multiple scattering fields. The convergence of series expressions of EM fields estimated by Pade approximant is theoretically guaranteed, with its computational complexity lower than that of the speeding algorithm. The EM fields are further verified by numerical tests. The effects of the height and conductivity of the ionosphere, the conductivity of air, the VED height, and the frequencies of the resonance phenomenon are also highlighted. The proposed method is helpful to capture the true nature of the field distribution within a spherical cavity.
WOS关键词ELECTROMAGNETIC-RADIATION ; PROPAGATION ; CONDUCTIVITY ; STRENGTHS ; DIPOLE
资助项目China Natural Science Foundation[41874088] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14050100]
WOS研究方向Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Remote Sensing ; Telecommunications
语种英语
WOS记录号WOS:000681766000003
出版者AMER GEOPHYSICAL UNION
资助机构China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; China Natural Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/101899]  
专题地质与地球物理研究所_深部资源勘探装备研发
地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Di, QingYun
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, CAS Engn Lab Deep Resources Equipment & Technol, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liang, PengFei,Di, QingYun,Fu, Changmin,et al. Pade Approximant ELF VED Fields in the Earth-Ionosphere Cavity[J]. RADIO SCIENCE,2021,56(7):10.
APA Liang, PengFei,Di, QingYun,Fu, Changmin,Wang, Ruo,Fan, Jianbao,&Gao, Ya.(2021).Pade Approximant ELF VED Fields in the Earth-Ionosphere Cavity.RADIO SCIENCE,56(7),10.
MLA Liang, PengFei,et al."Pade Approximant ELF VED Fields in the Earth-Ionosphere Cavity".RADIO SCIENCE 56.7(2021):10.

入库方式： OAI收割

来源：地质与地球物理研究所

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