The rapid expansion of the commercial space economy over the last decade has resulted in demand on spectrum far exceeding the Commission’s expectations at the time it devised and adopted its Upper Microwave Flexible Use Spectrum (UMFUS) sharing framework. At the same time, negligible adoption of millimeter wave bands by terrestrial services has upended the assumptions central to the framework and its constraints on earth station deployments in favor of 5G operations. As a result, the UMFUS framework quickly became an impediment to efficient use of millimeter wave spectrum and a barrier to the deployment of next-generation satellite systems.
