Modeling of the Electron Precipitated Flux in Non-dipole Magnetic Field

The Earth's magnetic field is a complex structure, exhibiting varying strengths across different coordinates. Of particular interest is the South Atlantic Anomaly (SAA), a region characterized by a weak magnetic field and intense precipitation processes. Accurate modeling of electron precipitation above this area demands a comprehensive approach, involving the calculation of magnetic fields and electron bounce. Incorporating realistic field models, such as Tsyganenko (1989; T89) for external and Internation Geomagnetic Reference Field (IGRF) for internal fields, is essential for correct modeling. Furthermore, dividing the loss cone into drift and bounce loss cones, correlated with geomagnetic longitudes, has to account for more accurate numbers of precipitated particles. By simulating a geomagnetic storm occurring in June 2016 and validating our findings against observations from the Electron Losses and Fields INvestigation instrument on board the Lomonosov satellite (ELFIN-L) in low-Earth orbit, we studied and compared precipitation activities during both quiet and disturbed geomagnetic conditions of this event. Our investigation underscores the significance of incorporating the non-dipole loss cone model and bounce-averaged lifetimes incorporated into the loss cone losses, leading to calculated drift loss cone flux, and potentially - of the precipitated flux. In our study, we show the importance of the non-dipole magnetic field models utilization leading to prospective improvement in estimation of different flux populations.