| Agenda Item 1.2 |
This agenda item considers possible revisions of sharing conditions in the frequency band 13.75-14 GHz to allow the use of uplink fixed-satellite service earth stations with smaller antenna sizes. The ITU-R is invited to study possible changes to the minimum antenna size and associated power limitations to protect the services as stipulated in Nos 5.502 and 5.303. WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate. |
| Agenda Item 1.9 |
This agenda item is to review Appendix 26 of the Radio Regulations in support of aeronautical mobile (OR) high frequency modernization. The ITU-R is invited to study: - the introduction of new technologies that enhance performance, including but not limited to, new classes of emission and wideband systems
- the definition of the relevant technical and operational characteristics and conduct sharing and compatibility studies with existing aeronautical mobile (OR) service systems and with other incumbent services that are allocated on a primary basis in the same or adjacent bands
- identification of any potential modifications to Appendix 26 without modifying the existing area allotments while taking into account that the current use of the narrow band systems shall remain unchanged and shall not be impacted nor precluded by any revision to Appendix 26.
WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate. |
| Agenda Item 1.15 |
This agenda item is consider studies on frequency-related matters, including possible new or modified space research service (space-to-space) allocations, for future development of communications on the lunar surface and between lunar orbit and the lunar surface. The ITU-R is invited to: - study the spectrum needs of systems in the SRS which may operate on the lunar surface or systems in lunar orbit communicating with systems on the lunar surface, in the frequency ranges:
- 390 - 406.1 MHz, 420 - 430 MHz and 440 - 450 MHz outside the shielded zone of the Moon (SZM)
- 2 400 - 2 690 MHz, 3 500 - 3 800 MHz, 5 150 - 5 725 MHz, 5 775 - 5 925 MHz, 7 190 - 7 235 MHz, 8 450 - 8 500 MHz and 25.25 - 28.35 GHz
- study the technical and operational characteristics as well as protection criteria of systems in the SRS that are planned for operation in the frequency bands above as well as protection criteria to be applied for the protection of the radio astronomy service (RAS) and SRS active and passive sensors on the lunar surface and in lunar orbit
- study the propagation considerations for lunar surface systems and lunar-orbiting systems operating in the frequencies above
- study sharing and compatibility related to systems in the SRS that are planned for operation in the frequency ranges above to ensure protection of radiocommunication services in these bands (SRS, FSS, BSS, ISS, EESS, ISM, fixed, mobile etc.) and in particular the RAS
- study potential new or modified frequency allocations and/or identifications to the SRS with appropriate regulatory provisions, for communications on the lunar surface or in lunar orbit communicating with systems on the lunar surface
- to study spectrum needs for lunar communications which may be needed for communications between the Earth, lunar-orbiting spacecraft and the lunar surface
- to study whether future radiocommunication systems in the vicinity of the Moon can be accommodated within existing SRS and whether the regulatory provisions described in the Radio Regulations are sufficient
With the exception of the last item, WRC-27 is invited to review the results of these studies and take necessary actions, as appropriate |
