Results of the Astrogeo modelfit jet kinematics. Left: Stacked images of naturally weighted CLEAN maps of 1928+738 at X- and S-bands from the Astrogeo program. The averaged circular beams with sizes of 1.57 mas and 5.43 mas, respectively, are shown in the top left of each contour map. The jet components are labeled individually. Right: Distance from the core as a function of time (data points) for all Astrogeo knots detected at ≲8.6 GHz with linear fits (straight lines) overlaid. The different markers are used to distinguish observing frequencies.