VLBI baseline variations from the Ice‐4G Model of postglacial rebound

An analysis is presented of selected VLBI baseline variations expected as a consequence of the continuing process of glacial isostatic adjustment. Although these baseline variations are for the most part dominated by the radial component of the motion, the tangential component can also be an important contributor to the net effect and is in fact dominant for short baselines. The new calculations have been performed with the recently derived ICE‐4G model of the last deglaciation event of the current ice age (Peltier, 1994), and the results demonstrate that those obtained with the previous ICE‐3G model are not reliable.