pert Moscow, USSR 0 0 7 7 -8 9 2 3 / 8 3 / 0 4 1 0 1 $1.75/1 Q 1983, NYAS 2 Annals New York Academy of Sciences a b eo FIGURE I . (a) Ion whistler mode, 0 c w < Qm+. (b) Electron whistler mode, wRs c w c ow Extraordinary slow wave, w,, < w c ww Al'pert: Electric Dipole Field in Cold Magnetoplasma 3 frequencies of electrons. For this purpose, the formula determining the angle between the direction of the group velocity vector and the external magnetic field, Ho. was used: a = earctan