Top: median of 19-h bins of ICA H₂O⁺ ion bulk velocities in terms of magnitude (black line) and a purely radial component (purple line) with corresponding ±1σ spread (shaded) from the standard deviation of the mean, as well as the two LAP effective ion speed estimates from the cross-calibration in Sect. 4.3 (blue line) and 19-h binned medians from sweeps (red line) versus time for a selected time period where the radial distance was rapidly varied. Bottom: radial distance versus time for the same time period. At ∼1000 km to 30 km, the radial component of the ion velocity seems to dominate, and we have good agreement for all estimates when available. Even closer to the comet nucleus, the radial component decreases, perpendicular components grow, and as expected both LAP effective ion speed estimates increase as the magnitude of the velocity increases.