PLASMA-WAVE OBSERVATION AND SOUNDER EXPERIMENTS (PWS) USING THE AKEBONO (EXOS-D) SATELLITE - INSTRUMENTATION AND INITIAL RESULTS INCLUDING DISCOVERY OF THE HIGH-ALTITUDE EQUATORIAL PLASMA TURBULENCE

Plasma waves and sounder experiments (PWS) onboard the Akebono (EXOS-D) satellite have been successfully made. From the global distribution of the upper hybrid frequency emissions, the structures of the plasmasphere are clarified. Auroral kilometric radiations are observed in the region associated with the auroral particle acceleration regions. In the equatorial region of the plasmasphere the enhancement of the upper hybrid mode waves is discovered; the enhancement shows two possible plasma turbulences. -from Authors