WRC 2023 Agenda Item Details

Agenda Item: Agenda Item 9.1 Topic A
Resolution(s): Resolution 657 (Rev. WRC-19)
Description of work:

This agenda item is to review the results of studies relating to the technical and operational characteristics, spectrum requirements and appropriate radio service designations for space weather sensors with a view to describing appropriate recognition and protection in the Radio Regulations without placing additional constraints on existing services.

The ITU-R is invited to:

  1. to identify, in time for WRC-23, and based upon existing and possible further ITU-R studies on the technical and operational characteristics, specific space weather sensors which need to be protected by appropriate regulation. This includes determining if receive-only space weather sensors shall be designated as applications of the Metaids services, to determine the appropriate radiocommunication service, if any, for cases where it is determined that receive-only space weather sensors do not fall under the Metaids service
  2. to conduct, in time for WRC-23, any necessary sharing studies with incumbent systems operating in frequency bands used by space weather sensors with the objective of determine potential regulatory provisions that can be provided to receive-only operational space weather sensors for their appropriate recognition in the Radio Regulations, while not placing additional constraints on incumbent services
  3. to develop potential solutions to describe in the Radio Regulations in Articles 1 and 4 and/or as a WRC resolution, if deemed appropriate, for consideration by WRC-23, space weather sensor systems and their corresponding usage, as well as protection requirements for receive-only space weather sensors
  4. to conduct studies, in time for WRC-23, on the technical and operational characteristics of active space weather sensors and conduct necessary sharing studies with incumbent systems operating in frequency bands used by active space weather sensors, with the objective of determining the appropriate radiocommunication service for those sensors

The Director of the BR is instructed to report on the results of the ITU-R studies to WRC-23

Comments: Information about space weather systems can be found in Report ITU-R FS.2456, including frequencies used, impact on systems such as RNSS (which can also be used for space weather observations) and description of how solar flares flux density varies by wavelength.
Lead Working Party(s): WP 7C
Involved Working Parties: WP 1B, WP 3J, WP 3K, WP 3L, WP 3M, WP 5A, WP 5B, WP 5C, WP 6A, WP 7D
How Visualyse products can help: Space weather sensors can operate at a very wide range of frequencies and be located on the Earth or in space. There are therefore potentially a very wide range of services they could share with, both in-band or in an adjacent band. Visualyse Professional is designed to model as wide a range of services as possible, allowing these types of scenarios to be analysed. A range of modelling methodologies can be used including static and dynamic including modelling of satellite orbits. Propagation models are available for space to space, space to Earth and terrestrial paths and Visualyse Professional can model both co-frequency and non-co-frequency interference scenarios. Visualyse can model interference paths that are space-space, Earth-Earth, space-Earth and Earth-space.
How Transfinite consultants can help: We can undertake studies including analysis of sharing between the space weather sensors and other different services covered by this agenda item. We can help 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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