From Tables 4 and 5, it is clear that the use of the DGPS correction provided by SiGOG improves the estimation of all position coordinates, including the last base line with a length of more than 600 km (except for the east component at the POTS station when using precise orbits). The improvement is always more substantial for the vertical component, though the horizontal ones benefit from this DGPS correction, more clearly the smaller the base line.