RPC-ICA observation on 24 January 2015 versus time. Panel A): differential energy flux spectrum in m2 s-1 eV-1 sr-1. Energy is given as E/Q in eV/charge. White dashed lines: energy limits used for the energy integration of the He2+ fluxes. Green dashed lines: energy limits for the integration of He+ fluxes. Panel B): integrated He2+ and He+ ion fluxes, normalised for clarity to the first value of the time series FHe+ at 11:03 UT. A running average window of 3 × 192 s is used on the two signals to correct for the instrument’s elevation binning. Panel C): final He+/He2+ flux ratio in %. Panel D): heliocentric distance in AU (left y-axis, solid line) and cometocentric distance in km (right y-axis, dashed line).
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