Frequency Dependent Source Locations of Whistler Mode Waves in the Plasmasphere: A Raytracing Approach

Whistler mode waves play an important role in space weather dynamics. Plasmaspheric hiss and chorus are types of whistler mode waves prevalent in the magnetosphere. The source location of whistler mode wave energy has been a topic of research for nearly half a century. We present results of warm plasma whistler mode raytracing considering three source locations at $L=2$, 3.8 and 5 in the magnetosphere. Comparison of simulation results with frequency normalized observations from the Van Allen Probes spacecraft suggest that sources within the plasmasphere (L∼2) provide a significant contribution to the observed whistler mode wave power distribution.