WRC 2019 Agenda Item Details

Agenda Item: Agenda Item 1.6
Resolution(s): Resolution 159 [COM6/18] (WRC-15)
Description of work:

This agenda item considers the development of a regulatory framework for non-GSO FSS satellite systems that may operate in the frequency bands 37.5-39.5 GHz (space-to-Earth), 39.5-42.5 GHz (space-to-Earth), 47.2-50.2 GHz (Earth-to-space) and 50.4-51.4 GHz (Earth-to-space), in accordance with Resolution 159 [COM6/18] (WRC-15).

This includes studies of:

  1. technical and operational issues and regulatory provisions to protect existing GSO networks in the FSS, MSS and BSS,
  2. these studies shall focus exclusively on development of EPFD limits,
  3. studies and development of sharing conditions between non-GSO systems in these bands,
  4. studies relating to possible revision to Resolution 750 (Rev. WRC-15) to ensure protection of EESS (passive) from aggregate non-GSO FSS interference,
  5. studies to protect the radio astronomy service in relevant bands from aggregate non-GSO FSS interference.
Comments: This work item is part of an increasing interest in using EPFD as a regulatory tool to manage interference between services.
Lead Working Party(s): WP 4A
Involved Working Parties: WP 3M, WP 4B, WP 5A, WP 5B, WP 5C, WP 5D, WP 6A, WP 7B, WP 7C, WP 7D
How Visualyse products can help: Visualyse Professional can model GSO and non-GSO networks sharing in this band. There are a host of features designed to support this type of sharing analysis including tracking strategies (GSO arc avoidance, non-GSO constellation avoidance), steerable spot beams (GSO and non-GSO), GSO shaped beams, orbit dynamics, reading GSO and non-GSO from IFIC/SRS databases, service area and coverage analysis, statistics involving I/N, C/I, C/(N+I), PFD and EPFD metrics, traffic modelling and resource management features. It can also model other services including the EESS (passive) and RAS service. The analysis could either be undertaken assuming clear air (free space) propagation (as used for EPFD analysis) or including gaseous attenuation and/or rain P.618. Visualyse EPFD can be used to determined whether a non-GSO FSS network would meet the proposed EPFD limits before they are agreed.
How Transfinite consultants can help: We can undertake studies including analysis of sharing between the services covered by this agenda item, and identify suitable system characteristics and sharing criterias, and provide contributions and representation at the ITU-R WPs. Using our in house Visualyse Professional we can quickly model a very wide range of systems, services and scenarios. We have particular experience modelling non-GSO systems and are world experts on issues relating to the algorithm in Rec. ITU-R S.1503 and the verification EPFD limits. In addition, we have experience in developing methodologies to protect the RAS around 42 GHz. As primary authors of Rec. S.1503 we are in a unique position to support its revision should that be required
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