Radio Regulations
Source: the Radio Regulations published by the International Telecommunication Union (ITU).
All IBR RecommendationsAs incorporated in RR-2008
This is not the text in force. It is the version of this Recommendation that RR-2008 gave treaty-binding force, kept so that the incorporated set can be read as it stood at each conference.
Recommendation ITU-R M.1638-0
Mandatory (2003)Characteristics of and protection criteria for sharing studies for radiolocation, aeronautical radionavigation and meteorological radars operating in the frequency bands between 5 250 and 5 850 MHz
Version history
Version evolutionThe number in each cell (e.g. −9) is the Recommendation's revision number — the “-9” in ITU-R M.585-9, not a negative value. So −8 → −9 means the binding reference moved from the 8th to the 9th revision.
Incorporated into the RR by
RR provisions, footnotes and Resolutions that incorporate this Recommendation
Bands and services are derived from the footnotes of the Radio Regulations as they stand, so they are shown only on the edition in force.
Scope
antenna, signal propagation, target detection, and large necessary bandwidth characteristics of radar to achieve their functions are optimum in certain frequency bands;
Recommends
- that the technical and operational characteristics of the radiolocation, radionavigation and meteorological radars described in Annex 1 be considered representative of those operating in the frequency bands between 5 250 and 5 850 MHz (see Note 1);
- that Recommendation ITU-R M.1461 be used as a guideline in analysing compatibility between radiolocation, radionavigation and meteorological radars with systems in other services; that the criterion of interfering signal power to radar receiver noise power level I/N, of -6 dB be used as the required protection trigger level for the radiodetermination sharing studies with other services. This protection criterion represents the net protection level if multiple interferers are present.
- NOTE 1 – Recommendation ITU-R M.1313 should be used with regard to the characteristics of maritime radionavigation radars in the frequency band 5 470-5 650 MHz.
Source: ITU Radio Regulations, editions of 2008, 2012, 2016, 2020 and 2024. The English, French and Spanish texts are each taken from the official edition in that language, not translated from one another. Sources and citation.