Radio Regulations

Source: the Radio Regulations published by the International Telecommunication Union (ITU).

All IBR Recommendations

As incorporated in RR-2016

This is not the text in force. It is the version of this Recommendation that RR-2016 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)
S

Recommendation ITU-R S.1586-1

Mandatory (2002-2007)

Calculation of unwanted emission levels produced by a non-geostationary fixed-satellite service system at radio astronomy sites

View official text at ITU

Version history

Version evolution

The 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.

RR-2008 -1
RR-2012 -1
RR-2016 -1
RR-2020 -1
RR-2024 -1

Incorporated into the RR by

RR provisions, footnotes and Resolutions that incorporate this Recommendation

Footnote

5.551H

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 describes a method that could be used to calculate the unwanted emission levels produced by a non-GSO fixed-satellite service system on radio astronomy sites. It also contains a procedure for the calculation of the percentage of time during which a given equivalent power flux-density (epfd) is exceeded when the receiving antenna gain is assumed to be 0 dBi in the direction of the incoming interference, and a given integration time is considered.

Recommends

  1. that the calculation of unwanted emission levels produced by a non-GSO fixed-satellite service (FSS) system on radio astronomy sites could be conducted by administrations using the method described in Annex 1;
  2. that when performing these calculations, the antenna pattern described in Recommendation ITU-R RA.1631 could be used to model radio astronomy antennas;
  3. that the percentage of time during which an equivalent power flux-density (epfd) level (defined assuming a 0 dBi receiving antenna gain in the direction of interference and given an integration time) is exceeded could be calculated according to the method described in Annex 2.

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.