DOI: 10.1002/2016GL069174
论文题名: Multipoint MMS observations of fine-scale SAPS structure in the inner magnetosphere
作者: Erickson P.J. ; Matsui H. ; Foster J.C. ; Torbert R.B. ; Ergun R.E. ; Khotyaintsev Y.V. ; Lindqvist P.-A. ; Argall M.R. ; Farrugia C.J. ; Paulson K.W. ; Strangeway R.J. ; Magnes W.
刊名: Geophysical Research Letters
ISSN: 0094-8870
EISSN: 1944-8601
出版年: 2016
卷: 43, 期: 14 起始页码: 7294
结束页码: 7300
语种: 英语
英文关键词: mms
; region 2 Birkeland current
; ring current
; sub auroral polarization stream
Scopus关键词: Electric field effects
; Electric fields
; Ionosphere
; Ionospheric measurement
; Polarization
; Azimuthal electric fields
; Electric field fluctuations
; Field aligned currents
; Ionospheric structures
; Magnetospheric multi scale
; Ring currents
; Sub auroral polarization stream
; Subauroral polarization streams
; Magnetosphere
; altitude
; azimuth
; electric field
; electrodynamics
; ionosphere
; magnetosphere
; observational method
; polarization
; radar
; spacecraft
; Millstone Hill
; United States
; Vermont
英文摘要: We present detailed observations of dynamic, fine-scale inner magnetosphere-ionosphere coupling at ∼3.9Â RE in the Region 2 Birkeland field-aligned current (FAC). We find that observed electrodynamic spatial/temporal scales are primarily characteristic of magnetically mapped ionospheric structure. On 15 September 2015, conjugate Magnetospheric Multiscale (MMS) spacecraft and Millstone Hill radar observations show plasmasphere boundary region subauroral polarization stream (SAPS) electric fields at L = 4.0–4.2 near 21 MLT. MMS observations reveal high-altitude ∼1Â mV/m fine-scale radial and azimuthal electric field perturbations over ≤0.15Â L with high spatial coherence over ≥2–3Â min and show outward motion within a broader FAC of ∼0.12Â μA/m2. Our analysis shows that MMS electric field fluctuations are most likely reflective of SAPS ionospheric structure at scales of ∼22Â km and with ionospheric closure of small-scale filamentary FAC perturbations. The results highlight the ionosphere's importance in regulating fine-scale magnetosphere-ionosphere structure. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978532585&doi=10.1002%2f2016GL069174&partnerID=40&md5=c7df2a32406e1b3b7ac5842283faf418
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9833
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Haystack Observatory, Massachusetts Institute of Technology, Westford, MA, United States
Recommended Citation:
Erickson P.J.,Matsui H.,Foster J.C.,et al. Multipoint MMS observations of fine-scale SAPS structure in the inner magnetosphere[J]. Geophysical Research Letters,2016-01-01,43(14).