Magnetohydrodynamic wave phenomena have been investigated in the deep plasmasphere by the electric field measurements in the EXOS-D(Akebono) satellite. EXOS-D has highly eccentric orbits(the perigee: 274km. the apogee: 10. 500km). https://www.bekindtopets.com/flash-choice-2nd-Reconnaissance-Battalion-Patch-limited-save/