The spatiotemporal evolution of the electron number density during the Townsend pre-phase and streamer propagation phase is provided in this file. Due to their size, the data are saved in binary hdf5 file. The file can be opened using any program that supports opening hdf5 files, such as HDF Viewer, Origin Pro, Matlab, or various libraries in python. The data are stored as a three-column form table in which for a given time in the first column all axial positions are varied in the second column, whereas the third column contains the number density of electrons at the given time and position.

Dataset: 'Figure2'
Size: 208416
Structured array: column 1: 't [s]': H5T_IEEE_F64LE (double)
column 2: 'z [m]': H5T_IEEE_F64LE (double)
column 3: 'n_e [m^-3]': H5T_IEEE_F64LE (double)