WISE decomposition and analysis of a simulated jet with two speed components. Two groups of features evolving at two different speeds are simulated. Upper panel: blue crosses show the displacements detected by WISE from successive pairs in four simulated images (epochs). Green lines and orange shades indicate the two simulated displacements and rms of the Gaussian stochastic component. Lower panel: the histogram of the detected positional changes reveals two distinct components of the speed. The mean values of the speed and their rms, indicated in the top right corner, agree well with the simulated displacements Δx1 = 5 px and Δx2 = 20 px.
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