Figure 11

SPD double points in acceptance overlaps. Left:track-to-point $\Delta x_{\rm loc}$ for ``extra'' points before and after alignment Right: $\sigma$ of the $\Delta x_{\rm loc}$ distributions as a function of thetrack-to-module incidence angle selection; 2008 cosmic-ray data are compared to the simulation with different levels of residual misalignment See text for details.