Spectroscopic completeness vs. angular separation for the SDSS DR18 and NSA combined. Top: Data before applying the weight correction. The spectroscopic completeness noticeably decreases from θ = 55″ to smaller separations, while for θ>55″ it converges toward the overall spectroscopic completeness (f_s≈0.83). The solid orange line shows the fit to the data below θ = 55″. To improve the fitting quality and reduce error sizes, we used 10″ wide bins. Consequently, we also include a few galaxies between 55″ and 60″ for the fitting. Bottom: Data after applying the weight correction. The spectroscopic completeness was computed in the same way as in Fig. 5. The error bars were computed by error propagation.