Frequency sharing between systems in the fixed service using high-altitude platform stations and satellite systems in the geostationary orbit in the fixed-satellite service in the bands 47.2-47.5 and 47.9-48.2 GHz
The ITU Radiocommunication Assembly considering a) that new technology is being developed utilizing telecommunication relays located on high altitude platforms at fixed points in the stratosphere (see Note 1); b) that systems utilizing one or more high altitude platform stations (HAPS) located at fixed points in the stratosphere may possess desirable attributes for high-speed broadband digital communications, including interactive video and other applications, with significant potential for frequency reuse and capable of providing service to a high density of users; c) that such systems would be able to provide coverage to metropolitan regions with high elevation angles and short path lengths, and to outlying rural areas or neighbouring countries with low elevation angles but without reducing capacity; d) that broadband digital services provided by such systems in the fixed service (FS) are intended to provide widespread communications information infrastructures promoting the global information infrastructure (GII) network; e) that in areas of high population and business densities, users of these services are expected to be ubiquitous; f) that the radio spectrum above 30 GHz is allocated to a variety of radio services and that many different systems are already using or planning to use these frequency band allocations; g) that the bands 47.2-47.5 GHz and 47.9-48.2 GHz are allocated to the fixed-satellite service (FSS), including non-GSO systems, in the Earth-to-space direction; h) there is an increasing demand for access to these allocations; j) that according to Radio Regulations (RR) No. 5.552A the allocation to the FS in the bands 47.2-47.5 GHz and 47.9-48.2 GHz, is designated for use by HAPS; k) that according to Resolution 122 (Rev.WRC-2000), administrations are urged to facilitate coordination between HAPS systems in the fixed service operating in the bands 47.2-47.5 GHz and 47.9-48.2 GHz and other co-primary radio services in their territory and adjacent territories; l) that because systems in the FS using HAPS can use the full range of elevation angles, sharing with the FSS may present difficulties.