Radio Regulations

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

All IBR Recommendations

As 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)
RA

Recommendation ITU-R RA.1513-2

Mandatory (2001-2003-2015)

Levels of data loss to radio astronomy observations and percentage-of-time criteria resulting from degradation by interference for frequency bands allocated to the radio astronomy service on a primary basis

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 —
RR-2012 —
RR-2016 —
RR-2020 -2
RR-2024 -2

Incorporated into the RR by

RR provisions, footnotes and Resolutions that incorporate this Recommendation

Footnote

5.372

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 addresses the levels of data loss to radio astronomy observations and percentage-of-time criteria resulting from degradation by interference for frequency bands allocated to the radio astronomy service on a primary basis. It includes studies of sharing situations for terrestrial and space-based applications, as well as an extensive section on measurement of data loss from weak, pulsed interference.

Recommends

  1. that, for evaluation of interference, a criterion of 5% be used for the aggregate data loss to the RAS due to interference from all networks, in any frequency band allocated to the RAS on a primary basis, noting that further studies of the apportionment between different networks are required;
  2. that, for evaluation of interference, a criterion of 2% be used for data loss to the RAS due to interference from any one network, in any frequency band, which is allocated to the RAS on a primary basis;
  3. that the percentage of data loss, in frequency bands allocated to the RAS on a primary basis be determined by using one of the following: (1) Recommendation ITU-R S.1586; (2) Recommendation ITU-R M.1583, or (3) the percentage of integration periods of 2 000 s in which the average spectral pfd at the radio telescope exceeds the levels defined (assuming 0 dBi antenna gain) in Recommendation ITU-R RA.769, whichever is appropriate;
  4. that the criteria described in § 3.3.2 of Annex 1 be used for evaluation of interference, in any frequency band allocated to the RAS on a primary basis, from unwanted emissions produced by any non-GSO satellite system at radio astronomy sites.

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.