Radio Regulations
Source: the Radio Regulations published by the International Telecommunication Union (ITU).
All IBR RecommendationsAs incorporated in RR-2020
This is not the text in force. It is the version of this Recommendation that RR-2020 gave treaty-binding force, kept so that the incorporated set can be read as it stood at each conference.
See the edition in force (RR-2024)Recommendation ITU-R P.526-15
Mandatory (1978-1982-1992-1994-1995-1997-1999-2001-2003-2005-2007-2009-2012-2013-2018-2019)Propagation by diffraction
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
Footnote
Resolution
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
This Recommendation presents several models to enable the reader to evaluate the effect of diffraction on the received field strength. The models are applicable to different obstacle types and to various path geometries.
Keywords
Recommends
- that the methods described in Annex 1 be used for the calculation of field strengths over diffraction paths, which may include a spherical earth surface, or irregular terrain with different kinds of obstacles.
- TABLE OF CONTENTS
- Page
- Annex 1 2
- Introduction 2
- Basic concepts 3
+27 more in the full text
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.