This is a minimal dataset from the global Vlasiator run 'EGI', spanning time states from 1300-1470s, needed to reconstruct the results of Palmroth et al. (2023). The data contains selected Vlasiator outputs in the tail current sheet box, approximately spanning the following coordinates in the simulation coordinate system (equivalent to the GSE/GSM coordinate systems): X = [-1.6e+08, -2.8e+07 ] m ~= [-25, -5] RE Y = [-1.28e+08, 1.28e+08] m ~= [-20, 20] RE Z = [-3.2e+07, 3.2e+07 ] m ~= [-5, 5] RE Coordinate data is given in meters; in general, values are in SI units. The variables given are, all represent cell averages: - Magnetic field, 'vg_b_vol', units of T - Electric field, 'vg_e_vol', units of V m^-1 - Proton number density, 'proton/vg_rho', units of m^-3 - Proton bulk velocity, 'proton/vg_v', units of m s^-1 - Proton parallel temperature, 'proton/vg_t_parallel', units of K - Proton perpendicular temperature, 'proton/vg_t_perpendicular', units of K The data is given in the VTK format (XML binary), on the Vlasiator refined grid ('SpatialGrid'); filenames of the form 'natgeo_tailbox_minimal_{:04d}.vtu', with the enumeration matching the simulation time in seconds. The subfolder 'VDFs' contains four proton velocity distribution functions shown in the Palmroth et al. (2023) article. This data is also given in the VTK format (XML binary). Values ('proton') represent the cell-average phase-space density in units of m^-6 s^3. Cells with phase-space density less than 1x10^-15 m^-6 s^3 constitute the Vlasov solver buffer region. The data coordinates are in units of m s^-1 and the velocity coordinates correspond to velocity along the spatial coordinates. The filenames are of form 'velgrid.fig3x.{:09d}.{:04d}.vtu', with the longer number corresponding to spatial cell id and the shorter to simulation time in seconds.

2023