Closure phases on selected triangles at 230 GHz. The solid line (red in the online edition) shows the predicted closure phase in the absence of noise. Each point indicates 10 s of coherently integrated data. The fourth column shows the same triangle as the third column but with a higher data rate and substitution of Chile-10 for Chile-1. The same 2 hr period, corresponding to 4.5 periods (14.8 periods for Model E) is shown in all panels excepting PV-PdB-Chile-10.