Low Frequency Plasmaspheric Hiss Wave Activity Parameterized by Plasmapause Location: Models and Simulations | CU Experts

; Plasmaspheric hiss waves are a dominant source of scattering for keV –; MeV radiation belt electrons within the plasmasphere. Previous; simulation and modeling work concerning hiss waves has often; incorporated them via particle-based parameterizations (e.g., L-shell).; However, recent work has shown that not only is hiss wave power loosely; dependent on L-shell, but that proximity to the plasmapause may yield; more accurate wave power distributions as it pertains to the modeling; and scattering of electrons. This work serves to expand upon those; previous studies by creating a low frequency (20 – 150 Hz) hiss wave; model and incorporating a previously crafted high frequency; (> 150 Hz) hiss wave model based on plasmapause location,; proximity to the plasmapause, and; Kp; activity level. Diffusion; coefficients created using this method produced shorter lifetimes for; electrons between ~300 keV – 4 MeV than their L-sorted; counterparts. Furthermore, 3D-simulations using and comparing the; different hiss wave models (plasmapause sorting vs. L-sorting) find that; the plasmapause based approach yields more accurate results when; compared to Van Allen Probe-A observations.;

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