Articles | Volume 33, issue 8
https://doi.org/10.5194/angeo-33-1059-2015
https://doi.org/10.5194/angeo-33-1059-2015
Regular paper
 | 
31 Aug 2015
Regular paper |  | 31 Aug 2015

Energy–latitude dispersion patterns near the isotropy boundaries of energetic protons

V. A. Sergeev, S. A. Chernyaeva, S. V. Apatenkov, N. Y. Ganushkina, and S. V. Dubyagin

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Short summary
We investigate the precipitated-to-trapped flux ratio patterns near the proton isotropy boundary (IB) using NOAA-POES observations. For 30 and 80keV proton energies, we found only 31% of events showing the dispersion pattern predicted by the non-adiabatic scattering in the tail current sheet. Most frequent pattern had no measureable IB energy dispersion (63%); structured IBs with a few Jprec/Jtrap dropouts were also usual (60%). Roles of current sheet and wave-induced scattering are discussed.