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ITU-R R23-WP4A Meeting Documents
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[ 567 ]  2025-05-16 Chair, WP 4A   Report on the fifty-sixth meeting of Working Party 4A (Shanghai, China, 5-16 May 2025)     N/A  
  [ 567 ] Annex 1 - English -  Word 2025-06-11 [09:31]  14'074'218  bytes Working document towards a preliminary draft new ITU-R Report WRC-27 agenda item 1.1 - Use of frequency bands 47.2-50.2 GHz and 50.4-51.4 GHz (Earth-to-space) by aeronautical and maritime earth stations in motion in the fixed-satellite service  
  [ 567 ] Annex 11 - English -  Word 2025-06-06 [17:30]  3'170'369  bytes Elements of working document towards draft CPM text for WRC-27 agenda item 1.5  
  [ 567 ] Annex 13 - English -  Word 2025-06-06 [16:36]  75'102  bytes Elements of working document towards draft CPM text on WRC-27 agenda item 1.6  
  [ 567 ] Annex 5 - English -  Word 2025-06-06 [16:08]  41'285  bytes Working document towards draft CPM text for WRC-27 agenda item 1.3  
  [ 567 ] Annex 3 - Part 5 - English -  Word 2025-06-06 [16:03]  11'040'907  bytes Working document on WRC-27 agenda item 1.2 (Part 5) - Operational and technical limitations for FSS earth stations in the frequency band 13.75-14 GHz (Earth-to-space)  
  [ 567 ] Annex 3 - Part 6 - English -  Word 2025-06-06 [15:57]  1'121'499  bytes Agenda item 1.2 FSS deployment density discussion  
  [ 567 ] Annex 3 - Part 4 - English -  Word 2025-06-06 [14:58]  3'621'834  bytes Working document on WRC-27 agenda item 1.2 (Part 4) - Operational and technical limitations for FSS earth stations in the frequency band 13.75-14 GHz (Earth-to-space)  
  [ 567 ] Annex 3 - Part 2 - English -  Word 2025-06-06 [12:27]  11'588'183  bytes Working document on WRC-27 agenda item 1.2 (Part 2) - Operational and technical limitations for FSS earth stations in the frequency band 13.75-14 GHz (Earth-to-space)  
  [ 567 ] Annex 3 Part 3 - English -  Word 2025-06-06 [12:16]  20'492'834  bytes Working document on WRC-27 agenda item 1.2 (Part 3) - Operational and technical limitations for FSS earth stations in the frequency band 13.75-14 GHz (Earth-to-space)  
  [ 567 ] Annex 51 - English -  Word 2025-06-05 [14:23]  32'626  bytes Note from the Chair of Working Party 4A to the Director of the Radiocommunication Bureau  
  [ 567 ] Annex 52 - English -  Word 2025-06-05 [14:17]  39'306  bytes Date of beginning of the works related to non-WRC topics discussed under the purview of Working Group 4A1  
  [ 567 ] Annex 48 - English -  Word 2025-06-05 [14:09]  111'313  bytes Working document towards a preliminary draft new revision of Recommendation ITU-R S.1528 - Satellite antenna radiation patterns for non-geostationary orbit satellite antennas operating in the fixed-satellite service below 30 GHz  
  [ 567 ] Annex 50 - English -  Word 2025-06-05 [13:43]  72'326  bytes Draft reply liaison statement to Working Party 7D on WRC-27 agenda item 1.16 - Technical information to support studies under WRC-27 agenda item 1.16  
  [ 567 ] Annex 49 - English -  Word 2025-06-05 [13:35]  90'119  bytes Preliminary draft new revision of Recommendation ITU-R BO.1504 - Effective utilization of spectrum assigned to the broadcasting satellite service (sound)  
  [ 567 ] Annex 46 - English -  Word 2025-06-05 [13:30]  339'126  bytes Working document towards a preliminary draft new Recommendation - Maximum allowable aggregate interference levels from time-variant sources from other services into fixed-satellite service links  
  [ 567 ] Annex 47 - English -  Word 2025-06-05 [12:26]  28'455'525  bytes Working document towards a preliminary draft revision to Report ITU-R BO.2029 - Broadcasting-satellite service earth station antenna pattern measurements and related analyses  
  [ 567 ] Annex 42 - English -  Word 2025-06-05 [12:07]  1'345'999  bytes Working document towards a preliminary draft new Recommendation ITU-R S.[NON-GSO-MODELLING] - Modelling and simulation of non-GSO FSS systems for use in sharing and compatibility studies  
  [ 567 ] Annex 45 - English -  Word 2025-06-05 [11:50]  59'082  bytes Working document towards a preliminary draft revision of Recommendation ITU-R BO.1900 - Reference receive earth station antenna pattern for the broadcasting-satellite service in the band 21.4-22 GHz in Regions 1 and 3  
  [ 567 ] Annex 44 - English -  Word 2025-06-05 [11:47]  38'474  bytes Working document towards a preliminary draft revision of Recommendation ITU-R BO.1443-3 - Reference BSS earth station antenna patterns for use in interference assessment involving non-GSO satellites in frequency bands covered by RR Appendix 30  
  [ 567 ] Annex 43 - English -  Word 2025-06-05 [11:41]  44'525  bytes Working document towards a preliminary draft new Report ITU-R S.[INTERFERENCE-NGSO-NGSO/GSO]  
  [ 567 ] Annex 39 - English -  Word 2025-06-05 [11:32]  957'882  bytes Elements relating to working document towards a preliminary draft revision of Recommendation ITU-R S.1526-1  
  [ 567 ] Annex 41 - English -  Word 2025-06-05 [11:25]  38'543  bytes Some elements relating to working document towards a preliminary draft new Recommendation ITU-R S.[NON-GSO-MODELLING]  
  [ 567 ] Annex 40 - English -  Word 2025-06-05 [11:19]  911'847  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1529 - Analytical method for determining the statistics of interference between non geostationary satellite orbit fixed-satellite service systems and other non geostationary satellite orbit fixed satellite service systems or geostationary satellite orbit fixed satellite service networks  
  [ 567 ] Annex 38 - English -  Word 2025-06-05 [10:20]  41'968  bytes Detailed work plan for a revision to Recommendation ITU-R S.1503 in the period 2024-2025  
  [ 567 ] Annex 37 - English -  Word 2025-06-05 [09:33]  494'582  bytes Working document containing technical work relating to the GSO es gain patterns used by Recommendation ITU-R S.1503  
  [ 567 ] Annex 31 - English -  Word 2025-06-04 [16:55]  25'166'935  bytes Technical studies [for information] in response to WRC-23 minutes on Article 22 epfd limits without any regulatory consequences [for information]  
  [ 567 ] Annex 36 - English -  Word 2025-06-04 [16:05]  8'778'882  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1503 - Functional description to be used in developing software tools for determining conformity of non-geostationary-satellite orbit fixed-satellite service systems or networks with limits contained in RR Article 22 of the Radio Regulations  
  [ 567 ] Annex 23 - English -  Word 2025-06-04 [15:37]  48'618  bytes Working document towards candidate Topic under WRC-27 agenda item 7 - Proposed revision to Resolution 170 (Rev.WRC-23)  
  [ 567 ] Annex 19 - English -  Word 2025-06-04 [15:35]  49'714  bytes Working document towards candidate Topic under WRC-27 agenda item 7 assessing the potential advantage to define coordination arc for some frequency bands above 3.4 GHz and services currently not subject to the application of the coordination arc concept, and to review the existing coordination arc thresholds  
  [ 567 ] Annex 3 - English -  Word 2025-06-04 [15:28]  2'418'743  bytes Working document on WRC-27 agenda item 1.2 - Operational and technical limitations for FSS earth stations in the frequency band 13.75-14 GHz (Earth-to-space)  
  [ 567 ] Annex 35 - English -  Word 2025-06-04 [13:18]  3'187'195  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1325 - Simulation methodologies for determining statistics of short term interference between co frequency, codirectional non-geostationary-satellite orbit fixed-satellite service systems in circular orbits and other non-geostationary fixed satellite service systems in circular orbits or geostationary-satellite orbit fixed satellite service networks  
  [ 567 ] Annex 34 - English -  Word 2025-06-04 [10:50]  38'845  bytes Resolution 76 (Rev.WRC-23) - Methodology - Key challenges for discussion  
  [ 567 ] Annex 33 - English -  Word 2025-06-04 [10:16]  1'148'736  bytes Working document towards a preliminary draft new Recommendation ITU-R S.[EXCEEDANCE EPFD KA KU] - Examples of Technical procedures for addressing any exceedance of aggregate equivalent power flux-density into geostationary satellite networks in the fixed-satellite service from multiple non-geostationary satellite systems in the Ku and Ka frequency bands in the frequency bands covered by Resolution 76 (WRC-23)  
  [ 567 ] Annex 15 - English -  Word 2025-06-03 [17:13]  181'138  bytes Working document towards candidate topic under WRC-27 agenda item 7 transparency measures and improvements to the application of RR No. 4.4 to space/satellite services  
  [ 567 ] Annex 25 - English -  Word 2025-06-03 [17:13]  21'870'400  bytes Working document towards candidate topic under WRC-27 agenda item 7 - Possible measures to enhance long-term protection and sustainable development of BSS in the plan band against severe misaligned FSS in other regions  
  [ 567 ] Annex 22 - English -  Word 2025-06-03 [17:12]  51'375  bytes Working document towards candidate topic under WRC-27 agenda item 7 - Proposed revision to Resolution 553 (Rev.WRC-23)  
  [ 567 ] Annex 17 - English -  Word 2025-06-03 [17:11]  81'543  bytes Working document towards candidate topic under WRC-27 agenda item 7 regarding measures to restrict the use of the same satellite to BIU frequency assignments of different GSO satellite networks (within 0.5 degrees of longitude of the physical satellite) without moving the satellite ("Hop without move")  
  [ 567 ] Annex 16 - English -  Word 2025-06-03 [17:04]  44'459  bytes Working document towards candidate topic under WRC-27 agenda item 7 - The use of the same satellite or different satellites to repeatedly bring into use and bring back into use the same frequency assignments of a satellite network or system for a short period of time  
  [ 567 ] Annex 20 - English -  Word 2025-06-03 [17:00]  56'836  bytes Working document towards candidate Topic under WRC-27 agenda item 7 - Proposed modifications to Appendix 4  
  [ 567 ] Annex 21 - English -  Word 2025-06-03 [16:42]  43'199  bytes Working document towards candidate Topic under WRC-27 agenda item 7 - Exclusion of the territory of a country from the service area of a geostationary satellite network (GSO) in the fixed-satellite service (FSS) or mobile-satellite service (MSS) in a frequency band not subject to a Plan  
  [ 567 ] Annex 32 - English -  Word 2025-06-03 [16:31]  584'530  bytes Working document towards a preliminary draft new Recommendation ITU-R S.[AGGREGATE EPFD KA KU]  
  [ 567 ] Annex 30 - English -  Word 2025-06-03 [16:26]  42'514  bytes Draft work plan for the Handbook on Satellite Communications and Technologies  
  [ 567 ] Annex 12 - English -  Word 2025-06-03 [15:48]  782'435  bytes Elements for a working document on WRC-27 agenda item 1.6  
  [ 567 ] Annex 28 - English -  Word 2025-06-03 [14:52]  166'464  bytes Work plan of the Working Group of the plenary on Resolution ITU-R 74  
  [ 567 ] Annex 25 - Part 2 - English -  Word 2025-06-03 [14:51]  4'201'542  bytes  
  [ 567 ] Annex 25 - Part 1 - English -  Word 2025-06-03 [14:51]  17'848'347  bytes  
  [ 567 ] Annex 24 - English -  Word 2025-06-03 [14:25]  51'081  bytes Working document towards candidate topic under WRC-27 agenda item 7 - Inclusion of the territory of a country in the service area of a notified geostationary (GSO) satellite networks in the planned and unplanned BSS frequency bands and in the planned FSS frequency bands subject to Appendices 30A and 30B, without imposing new coordination restrictions to satellite networks already submitted to the bureau  
  [ 567 ] Annex 26 - English -  Word 2025-06-03 [14:19]  853'729  bytes Working document towards a preliminary draft ITU-R Handbook on best practices for the sustainable use of frequencies and associated non-GSO orbits by space radiocommunication services  
  [ 567 ] Annex 18 - English -  Word 2025-06-03 [14:11]  53'087  bytes Working document towards candidate topic under WRC-27 agenda item 7 - Recording of frequency assignments in space services under RR No. 11.41  
  [ 567 ] Annex 14 - English -  Word 2025-06-03 [11:12]  49'440  bytes Revisions to WRC-27 agenda item 7 draft work plan  
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