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This paper is related to satellite observations on board DEMETER of energetic electrons scattering just over the SURA facility in Russia (L ≈ 2.6). Two kinds of perturbations occurred in energetic particles, one with increase of electron flux, and one with pitch angle modulation. The phenomena are due to the artificial HF wave heating, with wide frequency band electromagnetic emissions occurring simultaneously. Based on the analysis and observations in wave-particle interaction at different frequency bands, the lightning-like VLF emissions and enhanced VLF transmitter signals induced by HF heating may contribute to the increase of electron flux and the modulation of pitch angles around L ~ 2.6 over SURA heating region.

HF-Induced Energetic Particle Precipitation Phenomena on Board Demeter