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Calculation of whistler-mode wave intensity using energetic electron precipitation


AuthorLi, W.; Ni, B.; Thorne, R.; Bortnik, J.; Green, J.; Kletzing, C.; Kurth, W.; Hospodarsky, G.;
KeywordsElectron traps; Energy measurement; Plasma measurements; Van Allen Probes
AbstractThe energetic electron population measured by multiple low-altitude POES satellites is used to infer whistlermode wave amplitudes using a physics-based inversion technique. We validate this technique by quantitatively analyzing a conjunction event between the Van Allen Probes and POES, and find that the inferred hiss wave amplitudes from POES electron measurements agree remarkably well with directly measured hiss waves amplitudes. We also use this technique to construct the global distribution of chorus wave intensity with extensive coverage over a broad L-MLT region during the 8\textendash9 October 2012 storm and demonstrate that the inferred chorus wave amplitudes agree well with conjugate measurements of chorus wave amplitudes from the Van Allen Probes. The evolution of the whistler-mode wave intensity inferred from low-altitude electron measurements can provide real-time global estimates of the wave intensity, which cannot be obtained from in-situ wave measurements by equatorial satellites alone, but are crucial in quantifying radiation belt electron dynamics.
Year of Publication2014
Journal
Volume
Number of Pages
Section
Date Published08/2014
ISBN
URLhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6929965
DOI10.1109/URSIGASS.2014.6929965