ITU-R REPORT S.2223

Abstract

<strong>Introduction</strong> <br>GSO fixed-satellite service networks are being used at an increasing rate to provide services to earth stations mounted on mobile platforms. GSO FSS networks are currently providing valuable broadband telecommunications services to aircraft, ships, trains and other vehicles in the 14.0-14.5 GHz (Earth-to-space) and 10.7-12.7 GHz (space-to-Earth) bands, e.g. Resolution 902 (WRC-03). The growing demand for service to these mobile platforms has caused service providers to turn to the 17.3-30.0 GHz FSS band to meet the need for increased broadband speed, capacity, and efficiency. <br>Advances in satellite antenna technology, particularly the development of 3-axis stabilized antennas capable of maintaining a high degree of pointing accuracy even on rapidly moving platforms, have allowed the development of mobile earth stations with very stable pointing characteristics. Similarly, the application of low power density waveforms has likewise enabled the use of smaller antennas and lower performance pointing systems while still maintaining off-axis e.i.r.p. density within prescribed limits. When properly managed and controlled, the technical characteristics of these mobile earth stations are indistinguishable from fixed earth stations when viewed from an interference perspective to FSS networks. <br>This Report presents technical and operational requirements for FSS earth stations on mobile platforms in bands from 17.3 to 30.0 GHz. The Report describes how such earth stations operating in FSS allocations between 17.3-30.0 GHz can be designed and operated in compliance with the existing requirements applicable to other types of FSS earth stations. By complying with these existing requirements, earth stations on mobile platforms will not create unacceptable levels of interference to other FSS systems and terminals operating in the same bands or sub-bands. This Report is intended to provide guidance to administrations and FSS network operators wishing to implement earth stations on mobile platforms in FSS allocations in the 17.3-30.0 GHz band.