WRC 2027 Agenda Items for WP 7D

Radio astronomy

The list below shows all the WRC 2027 Agenda Items for which this is the lead group. Click on an Agenda Item or Resolution to get more information about which Visualyse product to use and how Transfinite consultants could assist in studying this problem.

Agenda Item Description
Agenda Item 1.16

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
Agenda Item 1.18

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.