Six parameters investigated in this study, together with the number of detections, plotted as a function of time. From top to bottom: (a) density (nominal NG signal); (b) off-nadir angle; (c) (sub-spacecraft) latitude; (d) phase angle; (e) cometocentric distance; (f) heliocentric distance; (g) cumulative number of NG detection events and number of icy particles detected by the NG per month (the error bars represent the statistical uncertainty). The blue bands indicate the periods that are investigated for dependencies on the results of the cometocentric and heliocentric distances.