  We observed the thirteen extragalactic radio sources of the S5 polar cap
sample at 8.4 GHz with the Very Long Baseline Array, on 1997.93 and 1999.41. We
present the maps from those two epochs and briefly discuss the morphological
changes experimented by some of the radio sources in the 1.4 yr elapsed. These
results correspond to the first two epochs at 8.4 GHz of a program directed to
study the absolute kinematics of the radio source components of the members of
the sample by means of phase delay astrometry at 8.4, 15 and 43 GHz.
