Sequence of total (contours) and polarized (segments) intensity images of S4 0954+658 at 43 GHz, convolved with a beam of 0.24 × 0.15 mas² at PA = –10°. The global total intensity peak is 1606 mJy beam⁻¹ and the global polarized intensity peak is 104 mJy beam⁻¹; black line segments within each image show the direction of polarization and their length is proportional to the polarized intensity. The black horizontal line indicates the position of the core, A0, and gray, blue, and red circles show the locations of knots K14a,b and K15, respectively. The size of the circles is proportional to the estimated average size in each epoch. The detailed characteristics of the knots can be found in Table 1 and B.1.