SM23D-05
New Loss Model of Energetic and Relativistic Electrons Based on Van Allen Probes Measurements
Tuesday, 15 December 2015: 14:40
2018 (Moscone West)
Ksenia Orlova1,2, Maria Spasojevic3 and Yuri Shprits2, (1)Skolkovo Institute of Science and Technology, Skolkovo, Russia, (2)University of California Los Angeles, Los Angeles, CA, United States, (3)Stanford University, Stanford, CA, United States
Abstract:
The EMFISIS instrument on Van Allen Probes provides a vast quantity of fully resolved wave measurements below L=5.5 in the region that is most important for the radiation belt acceleration and loss. EMFISIS data show that plasmaspheric hiss waves can be observed at frequencies as low as 20 Hz and provide three-component magnetic field measurements that can be directly used for electron scattering calculations. Updated models of hiss wave intensity and spectral distribution based on statistical analysis of Van Allen Probes data were recently developed. We use these new models to compute and parameterize the lifetime of electrons as a function of kinetic energy, L-shell, Kp-index, and MLT. We perform and present detailed analysis of how the more accurate models of the wave intensity and frequency distribution change the resulting electron lifetimes. We also compare the obtained results with the previous lifetime model of Orlova et al. [GRL, 2014], which was based on single component electric field measurements from the sweep frequency receiver (SFR) onboard the CRRES satellite.
