Numerical modeling of plasmaspheric hiss characteristics

Details Numerical modeling of plasmaspheric hiss characteristics Numerical modeling of plasmaspheric hiss characteristics

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm44a..07b&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM44A-07

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2753] Magnetospheric Physics / Numerical Modeling, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2774] Magnetospheric Physics / Radiation Belts

Scientific paper

Recent work has shown that many of the known characteristics of plasmaspheric hiss are naturally reproduced when hiss is modeled as a set of chorus elements that have evolved from their source region in the plasmatrough, into the plasmasphere. The source region extends over a range of several L-shells, and contains wave power over a distribution of wave normal angles, a subset of which is able to escape the effects of Landau damping, propagate to high latitudes, enter the plasmasphere and perform cyclical trajectories lasting many tens of seconds. In this work, we explore the characteristics of plasmaspheric hiss by appropriately weighting the initial distribution of chorus wave power using statistical satellite data, and follow this wave power as it propagates into and within the plasmasphere. We specifically study the bandwidth of hiss, as well as the wave normal angle distribution as a function of L-shell, latitude, and magnetic local time. The computed distributions are compared to statistical satellite data.

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