WRC 2027 Agenda Item Details

Agenda Item: Agenda Item 1.6
Resolution(s): Resolution 131 (WRC-23)
Description of work:

This agenda item is to consider technical and regulatory measures for FSS networks/systems in the 37.5 - 42.5 GHz (space-to-Earth), 42.5-43.5 GHz, 47.2-50.2 GHz and 50.4 0 51.4 GHz (Earth-to-space) for equitable access to these frequency bands

The ITU-R is invited to study the technical and regulatory measures for FSS satellite networks/systems in these bands or portions of for equitable access while ensuring the protection of existing primary services in these bands and in adjacent bands taking into account the needs of developing countries:

  1. without adversely affecting those services, specifically the operation of satellite networks and systems in those bands
  2. without changing measure to protect terrestrial services from unacceptable interference

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.


This can be considered as analogous of the FSS and BSS plans in parts of C, Ku and lower Ka band but covering parts of Q/V band. Note that this covers both GSO networks and also non-GSO systems.

Lead Working Party(s): WP 4A
Involved Working Parties: WP 1B, WP 3M, WP 4B, WP 4C, 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 both GSO networks and non-GSO systems operation in these parts of Q/V band. Visualyse Professional was used in studies leading up to WRC-19 for a previous agenda item 1.6 which led to the development of the Resolution 770 regulatory framework. It can model rain fading, including correlation on the downlink, and the increase in unavailability/loss of throughput metrics often used in these bands. Analysis can also be done of the impact on terrestrial services and whether the GSO networks and non-GSO systems meet the PFD limits in Article 21.

How Transfinite consultants can help:

We can undertake studies including analysis of sharing between GSO networks and non-GSO systems and other services by this agenda item, and identify suitable system characteristics and sharing criteria, and provide contributions and representation at ITU-R Working Parties. Using our in house Visualyse Professional we can quickly model a very wide range of systems, services and scenarios.

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