Proceedings of the 25th European VLBI Group for Geodesy and Astrometry Working Meeting

Spectrum management for the VLBI Global Observing System (VGOS) is an important task to keep radio frequency interference as absent as possible from observation sites. Protection can only be granted, if na- tional and international authorities are made aware of the activities and operations at VLBI observing sites. To begin with spectrum management for the VGOS, it means two things: to be registered at the ITU-R as a Radio Astronomy Service site and try to get the re- quirements of VGOS into an official ITU-R document, so that further regulation actions can refer to an official document, e.g. for compatibility studies.