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 100-300 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. Key Points Measured and calculated hiss Bw from POES electron measurements agree well Electron ratio measured by POES is able to estimate hiss wave intensity This technique can be used to provide global hiss wave distribution
Geophysical Research Letters
American Geophysical Union Publications
Digital Object Identifier (DOI)
Li, W., B. Ni, R. M. Thorne, J. Bortnik, Y. Nishimura, J. C. Green, C. A. Kletzing, W. S. Kurth, G. B. Hospodarsky, H. E. Spence, G. D. Reeves, J. B. Blake, J. F. Fennell, S. G. Claudepierre, and X. Gu (2014), Quantifying hiss-driven energeticelectron precipitation: A detailed con-junctio event analysis, Geophys. Res. Lett., 41, 1085–1092, doi:10.1002/2013GL059132.
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