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Statistical Study on Spatial Distribution of Frequency-Chirping ECH Elements by Van Allen Probes

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成果类型:
期刊论文
作者:
Liu, Si;Chen, Yadan;Yang, Qiwu;Yang, Hongming;Xiao, Fuliang;...
通讯作者:
Xiao, FL
作者机构:
[Yang, Qiwu; Xiao, Fuliang; Chen, Yadan; Gao, Zhonglei; Liu, Si; Wang, Bowen] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha, Peoples R China.
[Xiao, Fuliang; Liu, Si] Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitori, Changsha, Peoples R China.
[Yang, Hongming] Changsha Univ Sci & Technol, Sch Elect & Informat Engn, Changsha, Peoples R China.
通讯机构:
[Xiao, FL ] C
Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha, Peoples R China.
Changsha Univ Sci & Technol, Hunan Prov Higher Educ Key Lab Modeling & Monitori, Changsha, Peoples R China.
语种:
英文
关键词:
ECH wave;frequency-chirping fine structure;spatial distribution
期刊:
GEOPHYSICAL RESEARCH LETTERS
ISSN:
0094-8276
年:
2023
卷:
50
期:
22
页码:
e2023GL106371-
基金类别:
National Natural Science Foundation of China; Natural Science Foundation of Hunan province [2021JJ20010, 2023JJ20038]; Science and Technology Innovation Program of Hunan Province [2021RC3098]; [42374199]; [42230209]; [42274212]; [42204171]; [42074198]
机构署名:
本校为第一且通讯机构
院系归属:
电气与信息工程学院
物理与电子科学学院
摘要:
Electron cyclotron harmonic (ECH) waves can scatter electrons into the atmosphere causing diffuse aurora with diffusion coefficients depending on the wave frequency. Here we report the Van Allen Probe observations of chirping ECH elements, which are fine structures with a frequency-chirping rate of ∼kHz/s. 1,834 samples are identified in the 51-month database and over 93 percent of them exhibit a falling tone pattern. ECH elements cover a broad region from 18 Magnetic Local Time (MLT) through dawn to 14 MLT with L = 4 − 7, and mainly occur in...

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