Nonlinear Wave Growth of Whistler‐Mode Hiss Emissions in a Uniform Magnetic Field

We conduct electromagnetic particle simulations in a uniform magnetic environment to verify the nonlinear wave growth process of plasmaspheric hiss equatorial plasmasphere. The satisfaction separability criterion for coexisting multiple frequency waves initial stage wavenumber-time evolution declares that packets are coherent and capable growing nonlinearly. Spatial temporal evolutions two typical modes located demonstrate consistency among growths, variations, inhomogeneity factor S packets, showing rising falling tones occur at negative positive values, respectively, an obvious happens reasonable range satisfying second-order resonance condition. Wave extracted from fields space time by band-pass filter confirm good agreement between theory simulation results. rates possess similar magnitudes simulation, they much greater than theoretical linear rate, indicating is essential generation hiss.