WISE decomposition and analysis of a simulated jet with an accelerating sinusoidal velocity field. The input velocity field (green line) is defined analytically and modified with a Gaussian stochastic component with an rms of 0.28 FWHM of the convolving beam. The rms margins due to the stochastic component are represented by the yellow-shaded area. A total of 87% of all detected SSP have been successfully matched by WISE. The detected positional changes (blue crosses) show rms deviations of 0.19 and 0.20 FWHM (in x and y coordinates, respectively) from the simulated sinusoidal field.