"Fundamentalstations - an important key for the combination of space techniques" Abstract: This paper summarizes the demand for Fundamentalstations as multitechnique sites. To make use of the strengths and to overcome the weakness of each space technique the combination is important for the provision of best results. In addition to the observables of the space techniques in situ observations are strongly required to provide local information. The spectrum of observations, the demands of the local ties and the potential of Fundamentalstations is shown by the example of the multitechnique sites Wettzell and TIGO. Gruss Wolfgang