Statistical Analysis of Transverse Size of Lower Band Chorus Waves Using Simultaneous Multisatellite Observations

TitleStatistical Analysis of Transverse Size of Lower Band Chorus Waves Using Simultaneous Multisatellite Observations
Publication TypeJournal Article
Year of Publication2019
AuthorsShen, X‐C, Li, W, Ma, Q, Agapitov, O, Nishimura, Y
JournalGeophysical Research Letters
Date Published05/2019
ISSN0094-8276
KeywordsChorus wave; Magnetosphere; Scale size; Van Allen Probes
AbstractChorus waves are known to accelerate or scatter energetic electrons via quasi‐linear or nonlinear wave‐particle interactions in the Earth's magnetosphere. In this letter, by taking advantage of simultaneous observations of chorus waveforms from at least a pair of probes among Van Allen Probes and/or Time History of Events and Macroscale Interactions during Substorms (THEMIS) missions, we statistically calculate the transverse size of lower band chorus wave elements. The average size of lower band chorus wave element is found to be ~315±32 km over L shells of ~5–6. Furthermore, our results suggest that the scale size of lower band chorus tends to be (1) larger at higher L shells; (2) larger at higher magnetic latitudes, especially on the dayside; and (3) larger in the azimuthal direction than in the radial direction. Our findings are crucial to quantify wave‐particle interaction process, particularly the nonlinear interactions between chorus and energetic electrons.
URLhttps://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL083118
DOI10.1029/2019GL083118
Short TitleGeophys. Res. Lett.


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