Average STIS spectrum of the Lyα+N V region from all observations in the 2000–2001 campaign re-binned into 0.05 Å pixels (black histogram). The solid red line tracing the data shows the total emission model. The key in the figure identifies the emission components in our model. The velocity scale along the top axis is for Lyαλ1215.67, relative to the host galaxy systemic redshift, z = 0.00973 (Theureau et al. 1998). Geocoronal emission in the center of the Milky Way Lyα absorption trough is indicated with an Earth symbol. The solid blue line showing the continuum also illustrates the impact of the damped Milky Way Lyα absorption. We note that the influence of this damping profile extends all the way from 1180 Å on through the peak of Lyα in NGC 3783 and into the N V profile at 1250 Å.