Flow of S CrA ¹³CO (2–1) data in the TIPSY pipeline. Panel a: intensity-weighted velocity (moment 1) map in colors, overlaid with contours representing the integrated intensity (moment 0; see Fig. E.1). The red segments in the bottom-left corners depict a length scale of 1000 au. The pink ellipses in the bottom-right corners depicts the beam size of the data. Panel b: isometric projection of the 3D PPV diagram of pixels with intensity >5σ in the whole field of view. Panel c: isometric projection of the PPV diagram of an isolated and cleaned streamer. The red square and its error bars represent intensity-weighted means and standard deviations, respectively. Panel d: same as panel c, but with the best-fit trajectory, as represented by the black line. Black circles denote the interpolated values of the theoretical trajectory, which are directly compared to the intensity-weighted means. Panel e: same as panel b, but with the best-fit trajectory, as represented by the black line. 3D interactive versions of panels d and e are available online.