Ions intensities and ratios as a function of time. Panel (a): Iron and oxygen intensity (I_Fe in triangles and I_O in stars) as a function of time, in red from the STA/LET instrument and in blue from the STB/LET instrument. Intensities are time-shifted according to the VDA. Panel (b): Iron-to-oxygen ratio (I_Fe/O) as a function of time, in red for STA and in blue for STB, time-shifted according to the VDA. Panel (c): 2.8–4 MeV electron/60–100 MeV proton ratio as a function of time, time-shifted according to the VDA (before calculation of the ratio), in red for STA and in blue for STB.