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)
RS

Recommendation ITU-R RS.2065-0

Mandatory (2014)

Protection of space research service (SRS) space-to-Earth links in the 8 400-8 450 MHz and 8 450-8 500 MHz bands from unwanted emissions of synthetic aperture radars operating in the Earth exploration-satellite service (active) around 9 600 MHz

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 -0
RR-2020 -0
RR-2024 -0

Incorporated into the RR by

RR provisions, footnotes and Resolutions that incorporate this Recommendation

Footnote

5.474C

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 provides mitigation techniques that can reduce the unwanted emissions of Earth exploration-satellite service (EESS) (active) systems in the space research service (SRS) band and recommends that EESS (active) systems fully protect the operations of SRS (deep space) missions during their critical events and prevent damages to the SRS earth station receivers at all times.

Keywords

Critical events damages deep space earth stations EESS (active) interference mitigation protection criterion receiver SAR saturation space-to-Earth space research service SRS synthetic aperture radar unwanted emissions

Recommends

  1. that EESS SAR systems should use the methods described in Annex 2 to reduce their unwanted emissions in the frequency band 8 400-8 500 MHz in order to:
  2. a) avoid damaging the SRS earth station receivers at all times;
  3. b) reduce the probability of saturating SRS earth station receivers;
  4. c) avoid causing interference exceeding the protection criteria of the SRS (deep space) earth stations during critical events;
  5. that, as a last resort, if recommends 1 cannot be satisfied fully by the application of the methods described in Annex 2, operators of EESS SAR systems should predict any remaining potential interference events and mitigate them by coordinating their operations with the operators of SRS missions at least seven days before an event for EESS SAR routine operations and at least 24 hours for EESS SAR acquisition of images in cases of emergency such as disaster management;
  6. that in order to facilitate the use of some of the mitigation techniques as well as operational coordination, operators of EESS SAR and SRS systems should share the orbital and telecom characteristics of their respective operations, including the up-to-date trajectory of their missions, antenna pointing, and schedule of critical events;

+2 more in the full text

Related ITU-R Recommendations / Reports

Recommendations

  • ITU-R RS.2043 — Characteristics of synthetic aperture radars operating in the Earth exploration-satellite service (active) around 9 600 MHz
  • ITU-R SA.609 — Protection criteria for radiocommunication links for manned and unmanned near-Earth research satellites
  • ITU-R SA.1014 — Telecommunication requirements for manned and unmanned deep-space research
  • ITU-R SA.1157 — Protection criteria for deep-space research
  • ITU-R SM.1541 — Unwanted emissions in the out-of-band domain

Reports

  • ITU-R RS.2308 — Radio frequency compatibility of unwanted emissions from 9 GHz EESS synthetic aperture radars with the Earth exploration-satellite service (passive), space research service (passive), space research service and radio astronomy service operating in the frequency bands 8 400-8 500 MHz and 10.6-10.7 GHz, respectively

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.