The structure function of ﹩\Vert {\rm{\Delta }}{{\boldsymbol{P}}}_{{\rm{V}}}\Vert ﹩ for line of sight Δd and angular separation Δθ. The data are binned into 22 bins for clarity, with the black data points representing the mean value of each bin. The error bars represent the 1σ uncertainties. These data are limited to Δd < 300 pc and Δθ < 1° due to lack of target pairs beyond these separations. The unbinned data are presented as semitransparent points.