First panel: colour bar used for all spectra in LR and in HR. Spectra have been acquired between the 30th of October 2014 and the 12th of April 2016. A separation has been set on 27 January 2016 corresponding to the time when p₀ has been voluntarily shifted in DFMS (see text and Appendix A). Colour bars representing the time coverage of DFMS spectra in LR (second panel) and HR (third panel) ion mode are also displayed. White means that sequences of scans are performed on that day and black none. Solstice refers to the Summer Solstice over the Southern Hemisphere (solar latitude = − 52°). Fourth panel: heliocentric distance, cometocentric distance, and local outgassing rate (≈ n_n r²v_n) as a function of time for the period of interest. Black dots correspond to (from left to right) the inbound Equinox, Perihelion, Solstice, and outbound Equinox. An outgassing speed v_n of 1 km s⁻¹ has been assumed for the outgassing.