Schematic showing all the parameters introduced in this study. The continuous curve represents the characteristic shape of velocities in time and distance. The thick dashed line illustrates the extrapolation of this line to the solar surface at distance, R = 1 R_SUN and velocity, V = 0 km s⁻¹. (R_MAX, R_RES) and (Time_MAX, Time_RES) are distance and time at maximum velocity (V_MAX) and residual velocity (V_RES), respectively.