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ITU-R Recommendations on RNSS systems
Recommendation ITU-R M.1787-1 – Description of systems and networks in the radionavigation-satellite service (spaceto- Earth and space-to-space) and technical characteristics of transmitting space stations operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz The information on orbital parameters, navigation signals and technical characteristics of systems and networks in the radionavigation-satellite service (RNSS) (space-to-Earth, space-to-space) operating in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, and 1 559-1 610 MHz are presented in this Recommendation. This information is intended for use in performing analyses of radio frequency interference impact between systems and networks in the RNSS and with other services and systems. Recommendation ITU-R M.1901 – Guidance on ITU-R Recommendations related to systems and networks in the radionavigation-satellite service operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz This Recommendation is intended to provide guidance on other ITU-R Recommendations related to the technical characteristics and protection criteria of radionavigation-satellite service (RNSS) receiving earth stations and characteristics of RNSS transmitting space stations planned or operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz. In addition, this Recommendation gives a brief overview of those Recommendations. Recommendation ITU-R M.1902 – Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 215-1 300 MHz Recommendation ITU-R M.1903 – Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) and receivers in the aeronautical radionavigation service operating in the band 1 559-1 610 MHz Characteristics and protection criteria for radionavigation-satellite service (RNSS) receiving earth stations and aeronautical radionavigation service (ARNS) receiving stations operating in the band 1 559-1 610 MHz are presented in this Recommendation. This information is intended for performing analyses of radiofrequency interference impact on RNSS (space-to-Earth) and ARNS receivers operating in the band 1 559-1 610 MHz from radio sources other than in the RNSS. Recommendation ITU-R M.1904 – Characteristics, performance requirements and protection criteria for receiving stations of the radionavigation-satellite service (space-to-space) operating in the frequency bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz The characteristics and protection criteria for radionavigation-satellite service (RNSS) spaceborne receivers are presented in this Recommendation. This information is intended for performing analyses of radio-frequency interference impact on RNSS receivers operating space-tospace in the bands 1 164-1 215 MHz, 1 215-1 300 MHz and 1 559-1 610 MHz from emissions of non-RNSS sources. – Characteristics and protection criteria for receiving earth stations in the radionavigation-satellite service (space-to-Earth) operating in the band 1 164-1 215 MHz – Characteristics and protection criteria of receiving space stations and characteristics of transmitting earth stations in the radionavigation-satellite service (Earth-to-space) operating in the band 5 000-5 010 MHz Characteristics and protection criteria for radionavigation-satellite service (RNSS) receiving space stations, and characteristics of RNSS transmitting earth stations, planned or operating in the band 5 000-5 010 MHz are presented in this Recommendation. This information is intended for performing analyses of radio-frequency interference impact on systems and networks in the RNSS (Earthto- space) operating in this band from radio sources other than in the RNSS. In addition, a new ITU-R recommendation on characteristics and protection criteria of receiving earth stations and characteristics of transmitting space stations of the radionavigation-satellite service (space-to-Earth) operating in the band 5 010-5 030 MHz has been finalized and is currently under the procedure for approval by consultation which will end in December 2012. As mentioned above, all these ITU-R recommendations provide characteristics and protection criteria for generic types of RNSS receiving earth and space stations as well as transmission characteristics of all RNSS systems and networks in the bands 1 164-1 215 MHz, 1 215-1 300 MHz, 1 559-1 610 MHz, 5 000-5 010 MHz and 5 010-5 030 MHz, some with safety of life service provisions. All these ITU-R recommendations are freely accessible online at http://www.itu.int/rec/R-REC-M/en. The related studies are continuously evolving based on contributions to and participation at the meetings of ITU-R Working Party 4C, the responsible group where all the related work is currently being conducted, so that those ITU-R recommendations can always reflect the most recent developments related to systems and networks in the RNSS. Resolution 609 (Rev.WRC-07)Resolution 609 (Rev.WRC-07) establishes that Co nsultation Meetings between administrations operating or planning to operate systems in the aeronautical radionavigation service (ARNS) and systems in the radionavigation-satellite service (RNSS) in the 1 164-1 215 MHz frequency band should be held on a regular basis to achieve the level of protection for ARNS systems foreseen in resolves 1 of that Resolution. For more information see Circular Letter CR/202. A web site has been established for participants to the Consultation Meetings, see Resolution 609 (Rev. WRC-07) Consultation meeting, for: – posting of required information from administrations; – exchange of information; – posting the results of the epfd calculation from the participants of the RES-609 Consultation meeting; – posting the results of all RES- 609 Consultation meetings. Outcomes of ITU WRC-12 for the RNSS WRC-12 Agenda item 1.18 WRC-12 considered under its Agenda item 1.18 extending the existing primary and secondary radiodetermination-satellite service (space-to-Earth) allocations in the band 2 483.5-2 500 MHz in order to make a global primary allocation which would foster the provision of additional services/applications by RNSS systems. The results are as follows: – Unified primary RDSS allocation in the band 2 483.5 – 2 500 MHz in all regions: Region 1: new primary RDSS allocation; Region 2: no change to existing primary RDSS allocation; Region 3: secondary RDSS allocation upgraded to primary; – New RDSS power flux-density coordination thresholds to protect inband terrestrial services (except the radio location service in some Region 1 countries), with more relaxed (1 dB) threshold values in many countries; – No impact on RDSS systems in operation or filed before WRC-12; – Consequential upgrade of the radiolocation service to primary status in some Region 1 countries; – The existing MSS power flux-density coordination thresholds to protect in-band terrestrial services were maintained with more relaxed (1.5 dB) new threshold values in many countries. It should be noted that there is interest from RDSS operators to provide global services in the band 2 483.5-2 500 MHz with a harmonized regulatory framework. This band is intended to facilitate navigation signals for existing RDSS systems in this band to be used globally and to support potential signals from new RDSS systems, which, because of this band’s proximity to mobile service allocations above 2.5 GHz, may offer attractive synergies with terrestrial mobile systems due to improved antenna efficiencies and use of shared hardware not possible with other RNSS bands which could enable innovative low-cost combined navigation/communication applications for the mass market. WRC-12 also considered under its Agenda item 1.3 spectrum requirements and possible regulatory actions, including allocations, in order to support the safe operation of unmanned aircraft systems (UAS). The result is as follows: – New allocation of the band 5 030 – 5 091 MHz to the aeronautical mobile (R) service (AM(R)S). Unwanted emissions from the AM(R) S in the frequency band 5 030- 5 091 MHz shall be limited to protect RNSS system downlinks in the adjacent 5 010- 5 030 MHz band. WRC-12 Agenda item 1.4 WRC-12 further considered under its Agenda item 1.4 regulatory measures to facilitate introduction of new aeronautical mobile (R) service (AM(R)S) systems in the bands 112 – 117.975 MHz, 960 – 1 164 MHz and 5 000 – 5 030 MHz. The results are as follows: – Additional measures to protect the adjacent RNSS in the band 1 164 -1 215 MHz from the AM(R) S in the band 960 – 1 164 MHz; – No change in the band 5 000 – 5 030 MHz. Administrations intending to operate AM(R)S systems in the frequency band 960-1 164 MHz, in order not to cause harmful interference to the RNSS in the band 1 164-1 215 MHz, shall comply with the e.i.r.p. limits for ground and airborne stations set forth in Resolution 417 (Rev.WRC-12). In summary, the outcomes of ITU WRC- 12 were very positive for the RNSS: – The requested global primary allocation for the RDSS (space-to-Earth) in the band 2 483.5-2 500 MHz was obtained; – The RNSS was duly protected where there was a risk of harmful interference from new AM(R)S systems.
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