a simulation study of rxmode waves generation in the equatorial plasmasphere

The generation mechanism of rx-mode waves in the equatorial plasmasphere has not been well understood. the akebono passing through the storm time geomagnetic equator shows the possibility of the local enhancement of rx-mode waves in association with intense z-mode waves in the equatorial region. we use the initial parameters inferred from observational data from around the plasmawave generation region obtained by the akebono satellite. a comparison of linear growthrate calculations and simulation results is presented. the results of the simulation show two strong peaks related to the z-mode and rx-mode waves, while the separation of these wave frequencies is equal to one cyclotron frequency. it is shown that electromagnetic z and rx-mode waves could be coupled by a nonlinear interaction.