Individual velocity measurements with superposed best‐fit sine curves. The circled dots represent those from the final overlapping phases in the observation sequence. In a few cases, measurements were not possible or reliable because of data flaws, so not all quantities have 15 values plotted. The crosses show the average formal 1 σ errors and phase range for a measure. Top: O VI cross‐correlation velocities from the LiF1A (large circles) and LiF2B (small circles). Second from top: Lyman absorption velocities from cross‐correlation of the 915–940 Å region from the SiC2A channel, with different symbols to denote the two measurement methods (see text). Third from top: Continuum flux from the LiF1A channel in a region free of airglow and O VI emission. Bottom: Total flux from the broad O VI emission, averaged from the LiF1A and LiF2B channels.