DOI: 10.1002/2014GL060029
论文题名: Large anisotropies of >60MeV protons throughout the inner belt observed with the Van Allen Probes mission
作者: Mazur J.E. ; O'Brien T.P. ; Looper M.D. ; Blake J.B.
刊名: Geophysical Research Letters
ISSN: 0094-10594
EISSN: 1944-10325
出版年: 2014
卷: 41, 期: 11 起始页码: 3738
结束页码: 3743
语种: 英语
英文关键词: east-west effect
; inner belt
; protons
Scopus关键词: Anisotropy
; Instruments
; Probes
; Drift shell
; east-west effect
; Field of views
; Flux gradients
; Guiding centers
; Large anisotropy
; Monitoring change
; Radial gradient
; Protons
; altitude
; anisotropy
; atmospheric dynamics
; drift behavior
; optical property
英文摘要: We report large directional anisotropies of >60MeV protons using instrumentation on the Van Allen Probes. The combination of a spinning satellite and measurements from the Relativistic Proton Spectrometer instruments that are insensitive to protons outside the instrument field of view together yield a new look at proton radial gradients. The relatively large proton gyroradius at 60MeV couples with the radial gradients to produce large (maximum ~10:1) flux anisotropies depending on (i) whether the proton guiding center was above or below the Van Allen Probes spacecraft and (ii) the sign of the local flux gradient. In addition to these newly measured anisotropies, below ~2000km we report a new effect of systematically changing minimum altitude on some proton drift shells that further modulates the anisotropy caused by the atmosphere. This discovery may offer a new way of monitoring changes to the loss of inner belt protons into the Earth's atmosphere. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902015715&doi=10.1002%2f2014GL060029&partnerID=40&md5=d403df727942c141ed7d89b32d087144
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7858
Appears in Collections: 气候减缓与适应
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作者单位: Aerospace Corporation, Chantilly, VA, United States
Recommended Citation:
Mazur J.E.,O'Brien T.P.,Looper M.D.,et al. Large anisotropies of >60MeV protons throughout the inner belt observed with the Van Allen Probes mission[J]. Geophysical Research Letters,2014-01-01,41(11).