WRC 2027 Agenda Item Details

Agenda Item: Agenda Item 1.17
Resolution(s): Resolution 682 (WRC-23)
Description of work:

This agenda item is to consider regulatory provisions for receive-only space weather sensors and their protection in the Radio Regulations, taking into account the results of ITU Radiocommunication Sector studies, in accordance with Resolution 682. The ITU-R is invited to:

  1. study spectrum needs and appropriate protection criteria for receive-only space weather sensors, as well as system characteristics, as appropriate
  2. sharing and compatibility studies pertaining to potential new primary allocations to MetAids (space weather) in the frequency bands 27.5 - 28.0 MHz, 29.7 - 30.2 MHz, 32.3 - 32.6 MHz, 37.5 - 38.325 MHz, 73.0 - 74.6 MHz and 608 - 614 MHz for receive only sensors
  3. study possible regulatory provisions in the Radio Regulations to accommodate the possibility for an administration that desires to notify a receive-only space weather sensor station to be included in the MIFR

Any possible new primary MetAids (space weather) allocations shall not claim protection from, nor constrain the future development of, incumbent services in these frequency bands or adjacent frequency bands

WRC-23 is invited to review the results of these studies and take necessary actions, as appropriate


Article 11.2 states that any "frequency assignment to a transmitting station and to its associated receiving stations except for those mentioned in Nos. 11.13 and 11.14 shall be notified to the Bureau" - but what if there is no transmitting station? Hence the resolves relating to inclusion of receive only MetAids (space weather) in the MIFR.

Lead Working Party(s): WP 7C
Involved Working Parties: WP 3L, WP 3M, WP 4A, WP 4C, WP 5A, WP 5B, WP 5C, WP 5D, WP 6A, WP 7B, WP 7D
How Visualyse products can help:

We can model space weather systems in Earth orbit using Visualyse Professional or at deep space locations including Lagrange points using Visualyse Interplanetary. We can model other services in these bands including fixed, mobile, space research, space operations and broadcasting. Visualyse tools can model receive only systems as well as transmit/receive pairs and include both static and dynamic methodologies.

How Transfinite consultants can help:

We can undertake studies including analysis of sharing between the different services covered by this agenda item including Met Aids (space weather), fixed, mobile, space research, space operations and broadcasting. 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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