WRC 2027 Agenda Items for WP 3J

This agenda item is to consider possible additional allocations to the radiolocation service (RLS) on a primary basis in the frequency range 231-275 GHz and possible new identifications for the radiolocation service applications in frequency bands in the frequency range 275 - 700 GHz for millimetric and sub-millimetric wave imaging systems.

The ITU-R is invited to study:

1. technical and operational characteristics including protection criteria for receive-only and active millimetric and sub-millimetric wave RLS
2. studies on globally harmonized spectrum for RLS
3. sharing and compatibility studies (in-band and adjacent) for RLS and other services in the frequency range 231.5 - 275 GHz while ensuring protection for the current use and further development of the incumbent services allocated to this frequency range
4. sharing and compatibility studies (in-band and adjacent band) for RLS applications with EESS(passive), space research service (passive) and RAS applications in the frequency range 275-700 GHz while maintaining protection for the passive service applications identified in No. 5.565
5. sharing and compatibility studies (in-band and adjacent bands) for RLS applications with fixed service and land mobile service applications in the frequency range 275 - 450 GHz as identified in No. 5.564A

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.

This agenda item is to consider PFD and EIRP limits for inclusion in Article 21 for the FSS, MSS and BSS to protect fixed and mobile services in the frequency bands 71 - 76 GHz and 81 - 86 GHz.

The ITU-R is invited to study PFD and EIRP limits to be included in Article 21 for FSS, MSS and BSS satellite services to protect current and planned fixed and mobile services in these frequency bands.

WRC-27 is invited to consider the results of the above studies and take necessary actions, as appropriate.

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:

1. 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
2. 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
3. study the propagation considerations for lunar surface systems and lunar-orbiting systems operating in the frequencies above
4. 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
5. 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
6. to study spectrum needs for lunar communications which may be needed for communications between the Earth, lunar-orbiting spacecraft and the lunar surface
7. 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

Studies of technical and regulatory provisions necessary to protect radio astronomy operating in specific Radio Quiet Zones (RQZs) and, in frequency bands allocated to the radio astronomy service on a primary basis globally, from aggregate radio-frequency interference caused by systems in the non-geostationary-satellite orbit. The ITU-R is invited to:

1. study how interference from unwanted emissions from a single non-GSO satellite system operating in the adjacent and nearby frequency bands to those in Table 1 affects the operation of RAS station in bands for which they are primary
2. study how the aggregate interference from unwanted emissions from multiple non-GSO satellite systems in the adjacent and nearby frequency bands in Table 1 affect the operation of RAS stations in bands for which they are primary
3. study possible recognition of RQZs based on their characteristics and existing ITU-R studies
4. study how the aggregate interference from single and multiple non-GSO satellites systems affects the operation of RAS stations in the RQZs
5. study on new coexistence measures between non-GSO satellite systems and RAS station in the RQZs
6. study methods to calculate the necessary separation distances between gateways of non-GSO systems and RAS stations protected by the RQZs

WRC-23 is invited to review the results of these studies and take necessary actions, as appropriate

This agenda item is to consider, based on the results of ITU Radiocommunication Sector studies, possible regulatory measures regarding the protection of the Earth exploration-satellite service (passive) and the radio astronomy service in certain frequency bands above 76 GHz from unwanted emissions of active services, in accordance with Resolution 712. The ITU-R is invited to:

1. study compatibility between the EESS(passive) and the corresponding active services in adjacent bands as listed below:

• EESS(passive) in 86-92 GHz, active services in 81-86 GHz (FSS UL, MS) and 92-94 GHz (MS, RLS)
• EESS(passive) in 114.25-116 GHz, active services in 111.8-114.25 GHz (FS, MS)
• EESS(passive) in 164-167 GHz, active services in 158.5-164 GHz (FS, FSS DL, MS, MSS DL) and 167-174.5 GHz (FS, FSS DL, ISS, MS)
• EESS(passive) in 200-209 GHz, active service in 191.8-200 GHz (FS, ISS, MS, MSS, RNS, RNSS) and in 209-217 GHz (FS, FSS UL, MS)

2. study compatibility between the RAS and the corresponding active services in adjacent bands as listed below:

• RAS in 76-81 GHz, active services in 71-76 GHz (FSS, MSS, BSS)
• RAS in 130-134 GHz, active services in 123-130 GHz (FSS, MSS, RNSS)
• RAS in 164-167 GHz, active services in 167-174.5 GHz (FSS)
• RAS in 226-231.5 GHz, active service in 232-235 GHz (FSS)

WRC-27 is invited to determine, based on the results of studies, any required regulatory measures regarding the protection of the EESS(passive) and RAS for the frequency bands listed above.