Empirical model of lower band chorus wave distribution in the outer radiation belt

TitleEmpirical model of lower band chorus wave distribution in the outer radiation belt
Publication TypeJournal Article
Year of Publication2015
AuthorsAgapitov, OV, Artemyev, AV, Mourenas, D, Mozer, FS, Krasnoselskikh, V
JournalJournal of Geophysical Research: Space Physics
Date Published12/2015
Keywordsmodel for chorus wave
AbstractAccurate modeling of wave-particle interactions in the radiation belts requires detailed information on wave amplitudes and wave-normal angular distributions over L shells, magnetic latitudes, magnetic local times, and for various geomagnetic activity conditions. In this work, we develop a new and comprehensive parametric model of VLF chorus waves amplitudes and obliqueness in the outer radiation belt using statistics of VLF measurements performed in the chorus frequency range during 10 years (2001–2010) aboard the Cluster spacecraft. We used data from the Spatio-Temporal Analysis of Field Fluctuations-Spectrum Analyzer experiment, which spans a total frequency range from 8 Hz to 4 kHz. The statistical model is presented in the form of an analytical function of latitude and Kp (or Dst) index for day and night sectors of the magnetosphere and for two ranges of L shells above the plasmapause, from L = 4 to 5 and from L = 5 to 7. This model can be directly applied for numerical calculations of charged particle pitch angle and energy diffusion coefficients in the outer radiation belt, allowing to study with unprecedented detail their statistical properties as well as their important spatiotemporal variations with geomagnetic activity.
URLhttp://doi.wiley.com/10.1002/2015JA021829http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2015JA021829
DOI10.1002/2015JA021829
Short TitleJ. Geophys. Res. Space Physics


Page Last Modified: January 22, 2016