Time-distance diagrams of March 14 constructed with the artificial slits shown in Fig. 5. In panel (a), the diagram for S1 over DF is shown, and in panel (b), the diagram in S2 over RF is shown both panels in AIA 171Å. In this pass band, the prominence plasma appears in absorption as dark bands. The white dashed line shows the oscillation fit using Eq. (1). The best-fit parameters of the oscillation are shown over both panels. In panel (b), the fit is also shown by plotting jet1 with a red dashed line. This gives the jet propagation velocity shown in the panel.