RES157 – 251 – ADD RESOLUTION 157 (WRC-15) Study of technical and operational issues and regulatory provisions for new non-geostationary-satellite orbit systems in the 3 700-4 200 MHz, 4 500-4 800 MHz, 5 925-6 425 MHz and 6 725-7 025 MHz frequency bands allocated to the fixed-satellite service The World Radiocommunication Conference (Geneva, 2015), considering a) that systems based on the use of new technologies associated with both geostationary-satellite orbit (GSO) and non-geostationary-satellite orbit (non-GSO) constellations are capable of providing high-capacity and low-cost means of communication even to the most isolated regions of the world; b) that GSO and non-GSO satellite orbits and associated spectrum are valuable resources and equitable access to these resources should be protected for the benefit of all countries in the world; c) that facilitating the use of new non-GSO systems has the potential to augment substantially the capacity, spectrum efficiency and benefits derived from GSO and non-GSO systems operating in the frequency bands: 3 700-4 200 MHz, 4 500-4 800 MHz, 5 925-6 425 MHz and 6 725-7 025 MHz, noting a) that the Article 21 power flux-density (pfd) limits and Article 22 equivalent power flux-density (epfd↓) limits in the frequency band 3 700-4 200 MHz (space-to-Earth) and the Article 22 epfd↑ limits in the frequency band 5 925-6 725 MHz (Earth-to-space) were developed under agenda item 1.37 at WRC-03 based on a particular highly-elliptical orbit (HEO) configuration, while new non-GSO systems that seek to operate in these frequency bands may utilize different types of orbits; b) that Article 22 does not contain epfd↓ and epfd↑ limits for non-GSO systems in the frequency bands 4 500-4 800 MHz (space-to-Earth) and 6 725-7 025 MHz (Earth-to-space) allocated to the fixed-satellite service (FSS), the use of which is subject to the provisions of Appendix 30B; c) that the Report of the Director of the Radiocommunication Bureau to this conference acknowledges that there may be a need for “reviewing or confirming” assumptions that led to the current values of the Article 21 and Article 22 power limits, taking into account the characteristics of systems recently submitted “and the overall trend for a growing interest in operating non-GSO FSS systems, with the view to ensure that all existing services are adequately protected”; d) that specifically identified studies taking into account current technical and operational characteristics will help to determine appropriate Article 21 pfd limits and Article 22 epfd limits for the frequency bands 3 700-4 200 MHz, 4 500-4 800 MHz and 5 925-7 025 MHz for non-GSO systems,