Examples of LAP probe characteristics from various mission phases, with parameters as in Table 1 fitted to OML current models. Distances in AU are heliocentric and those in km are cometocentric. Data are blue dots and fitted currents are given by colours as in the inbox in panel c. Panels a: Solar wind prior to Rosetta arrival at comet (3.7 AU, 7000 km). b) Warm electrons at early activity (3.33 AU, 35 km). c) Cold electrons mix in as activity increases (2.57 AU, 28 km). d) Dense cold plasma near perihelion (1.25 AU, 180 km).