抄録
Pitch angle scattering and diffusion of inner belt electrons resonating with whistler-mode Decca signals of frequency 84.82kHz transmitted from Port Hedland, Australia (L=1.38) and observed at Kagoshima, Japan (L=1.2) are evaluated using quasi-linear theory of wave-particle interaction. The results show that the pitch angle scatterings are greater than 10-1 deg and lifetimes of the energetic electrons (ER=60keV) are -20min. These results indicate significant particle precipitation in the ionosphere. The evaluated precipitated flux is found to be 3.31×103el-cm-2-s-1 which in terms of energyflux is found to be 3.18×10-4ergs-cm-2-s-1. This is in good agreement with the precipitated flux observed in the low latitude zone of particle precipitation during magnetic storms.
