The “SafeSpace” database of ULF power spectral density and radial diffusion coefficients: dependencies and application to simulations

Abstract. Radial diffusion has been established as one of the most important mechanisms contributing to both acceleration and loss relativistic electrons in outer radiation belt, well supply particles inner belt. In framework “SafeSpace” project, we have used 9 years (2011–2019) multi-point magnetic electric field measurements from THEMIS A, D E satellites create a database radial coefficients (DLL) ultra-low-frequency (ULF) wave power spectral densities (PSDs) spanning an L? range 3 8. this work investigate dependence DLL on various solar wind parameters, geomagnetic indices coupling functions, L-shell, during cycle 24. Moreover, discuss uncertainties introduced estimation time series by partial azimuthal coverage provided situ measurements. Furthermore, investigate, via superposed analysis, drivers. We show, for first best our knowledge, that interplanetary coronal mass ejection (ICME)-driven disturbances accompanied high pressure values combined with intense magnetospheric compression can produce DLLB comparable or even greater than ones DLLE. This feature cannot be captured semi-empirical models introduces significant energy DLL. Finally, show advantages using means numerical simulations electron fluxes performed Salammbô code deviations predictions several depending level activity L-shell.