Erratum: Evolution of the ion environment of comet 67P during the Rosetta mission as seen by RPC-ICA. (27th November 2017) - Nilsson, Hans; Wieser, Gabriella Stenberg; Behar, Etienne; Gunell, Herbert; Wieser, Martin; Galand, Marina; Simon Wedlund, Cyril; Alho, Markku; Goetz, Charlotte; Yamauchi, Masatoshi; Henri, Pierre; Odelstad, Elias; et al.