Quantifying hiss-driven energetic electron precipitation: A detailed conjunction event analysis

Author
Keywords
Abstract
We analyze a conjunction event between the Van Allen Probes and the low-altitude Polar Orbiting Environmental Satellite (POES) to quantify hiss-driven energetic electron precipitation. A physics-based technique based on quasi-linear diffusion theory is used to estimate the ratio of precipitated and trapped electron fluxes (R), which could be measured by the two-directional POES particle detectors, using wave and plasma parameters observed by the Van Allen Probes. The remarkable agreement between modeling and observations suggests that this technique is applicable for quantifying hiss-driven electron scattering near the bounce loss cone. More importantly, R in the 100\textendash300 keV energy channel measured by multiple POES satellites over a broad L magnetic local time region can potentially provide the spatiotemporal evolution of global hiss wave intensity, which is essential in evaluating radiation belt electron dynamics, but cannot be obtained by in situ equatorial satellites alone.
Year of Publication
2014
Journal
Geophysical Research Letters
Volume
41
Number of Pages
1085-1092
Date Published
02/2014
URL
http://doi.wiley.com/10.1002/2013GL059132
DOI
10.1002/2013GL059132