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ITU-R R23-WP4A Meeting Documents
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  Number  Posted Size    
 
[ 1064 ]  2026-05-15 Chair, WP 4A   Report on the fifty-eigth meeting of Working Party 4A (Geneva, 4-14 May 2026)     N/A  
  [ 1064 ] Annex 6 - Annex 8 - English -  Word 2026-06-04 [17:23]  3'157'455  bytes Question and answers over input studies - May 2026 meeting  
  [ 1064 ] Annex 6 - Annex 7 - English -  Word 2026-06-04 [17:21]  48'536  bytes Technical discussions  
  [ 1064 ] Annex 6 - Annex 6 - English -  Excel 2007 2026-06-04 [17:20]  37'170  bytes  
  [ 1064 ] Annex 6 - Annex 5 - English -  Word 2026-06-04 [17:17]  1'432'058  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)  
  [ 1064 ] Annex 6 - Annex 4 - English -  Word 2026-06-04 [17:05]  21'849'669  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)  
  [ 1064 ] Annex 6 - Annex 3 - English -  Word 2026-06-04 [17:02]  6'313'469  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)  
  [ 1064 ] Annex 6 - Annex 2 - English -  Word 2026-06-04 [16:54]  60'295'082  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)  
  [ 1064 ] Annex 6 - Annex 1 - English -  Word 2026-06-04 [16:51]  16'169'698  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)  
  [ 1064 ] Annex 6 - English -  Word 2026-06-04 [16:48]  4'245'842  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)  
  [ 1064 ] Annex 38 - English -  Word 2026-06-04 [10:59]  141'061  bytes Working document towards a preliminary draft 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  
  [ 1064 ] Annex 26 - English -  Word 2026-06-03 [17:08]  24'027'015  bytes Supporting material in relation to possible revision of Recommendations ITU-R S.1428 and ITU-R BO.1443, where appropriate and applicable  
  [ 1064 ] Annex 40 - English -  Word 2026-06-03 [16:42]  231'878  bytes Elements towards submission of satellite system characteristics as per recommends 4 of Recommendation ITU-R S.1328 - Satellite system characteristics to be considered in frequency sharing analyses within the fixed-satellite service  
  [ 1064 ] Annex 47 - English -  Word 2026-06-03 [16:34]  39'374  bytes Liaison statement to external organization IADC ? Inter-agency space debris coordination committee - Activities related to the sustainable use of radio-frequency spectrum and associated satellite-orbit resources used by space services  
  [ 1064 ] Annex 41 - English -  Word 2026-06-03 [16:32]  235'290  bytes Working document towards a preliminary draft new Report ITU-R S.[IOS SPEC NEEDS] - Spectrum needs and operational description of in-orbit servicing (IOS) to support their safe operation  
  [ 1064 ] Annex 39 - English -  Word 2026-06-03 [15:26]  52'433  bytes Preliminary draft revision of Recommendation ITU-R S.673-2 - Terms and definitions relating to space radiocommunications  
  [ 1064 ] Annex 3 - English -  Word 2026-06-03 [15:21]  67'146  bytes Working document related to a preliminary new Recommendation ITU-R S.[ESIM-NCMC] - The functionalities and implementation of a network control and monitoring centre for earth stations in motio  
  [ 1064 ] Annex 11 - English -  Word 2026-06-03 [11:47]  41'542  bytes Draft work plan for WRC-27 agenda item 1.4  
  [ 1064 ] Annex 5 - English -  Word 2026-06-03 [09:09]  45'157  bytes Parameters table for comparison - (WRC-27 agenda item 1.2)  
  [ 1064 ] Annex 2 - English -  Word 2026-06-02 [17:30]  19'829'261  bytes Supporting material for draft CPM text on 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  
  [ 1064 ] Annex 34 - English -  Word 2026-06-02 [17:09]  924'809  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  
  [ 1064 ] Annex 37 - English -  Word 2026-06-02 [16:18]  48'310  bytes Working document towards a preliminary draft new Recommendation ITU-R S.[RESOLUTION 769] - Methodology for evaluating the aggregate unavailability increase and throughput degradation of geostationary satellite networks in the fixed-satellite service from multiple non-geostationary satellite systems in the Q/V frequency bands in the frequency bands covered by Resolution 769 (WRC-19)  
  [ 1064 ] Annex 36 - English -  Word 2026-06-02 [16:12]  127'278  bytes Working document towards preliminary draft new Recommendation ITU-R S.[RES 769 SUP LINKS] - Methodology to validate supplemental link for the protection of geostationary networks from the aggregate interference produced by non-geostationary FSS systems in the Q/V band ranges  
  [ 1064 ] Annex 33 - English -  Word 2026-06-02 [16:12]  293'816  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1715 - Guidelines developed in response to the studies requested in Resolution 140 (WRC 03)  
  [ 1064 ] Annex 32 - English -  Word 2026-06-02 [16:04]  1'216'788  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1526-1  
  [ 1064 ] Annex 28 - English -  Word 2026-06-01 [15:09]  115'135  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  
  [ 1064 ] Annex 31 - English -  Word 2026-06-01 [09:47]  3'904'756  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  
  [ 1064 ] Annex 30 - English -  Word 2026-06-01 [09:31]  69'007  bytes Preliminary draft new Report ITU-R S.[INTERFERENCE-NGSO-NGSO/GSO] - Examples of methodologies to assess interference levels during coordination when non-geostationary FSS satellite systems for frequency ranges between 10.7 and 52.4 GHz are involved  
  [ 1064 ] Annex 29 - English -  Word 2026-06-01 [09:26]  42'257  bytes Detailed work plan for a revision to Recommendation ITU-R S.1503  
  [ 1064 ] Annex 24 - English -  Word 2026-05-29 [14:23]  3'153'561  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  
  [ 1064 ] Annex 27 - English -  Word 2026-05-29 [14:09]  83'567  bytes Working document towards a preliminary draft revision of Recommendation ITU-R S.1428-1 - Reference FSS earth-station radiation patterns for use in interference assessment involving non-GSO satellites in frequency bands between 10.7 GHz and 30 GHz  
  [ 1064 ] Annex 23 - English -  Word 2026-05-29 [11:55]  40'507  bytes 1ST Consultation Meeting draft Terms of Reference - Text elements for the Chair's Report on the development of Terms of Reference for the first Consultation Meeting as required under Resolution 76 (Rev.WRC-23)  
  [ 1064 ] Annex 22 - English -  Word 2026-05-29 [11:47]  86'869  bytes Stage 2 process (Resolution 76 (Rev.WRC-23)) - Text elements for the Chair's Report on the development of the Stage 2 process (Detailed analysis prior to consultation meeting based on operational parameters) as required under Resolution 76 (Rev.WRC-23)  
  [ 1064 ] Annex 20 - Part 6 - English -  Word 2026-05-28 [16:58]  10'454'069  bytes Annex 6 - Measurement campaign of interference to GSO earth stations from non-GSO systems  
  [ 1064 ] Annex 20 - Part 5 - English -  Word 2026-05-28 [16:56]  6'585'213  bytes Annex 5  
  [ 1064 ] Annex 20 - Part 4 - English -  Word 2026-05-28 [16:52]  188'224  bytes Annex 4 - Questions to be answered to complete technical studies on epfd limits in RR Article 22  
  [ 1064 ] Annex 20 - Part 3 - English -  Word 2026-05-28 [16:49]  3'934'863  bytes Annex 3 - Overview of the epfd limits in RR Article 22  
  [ 1064 ] Annex 20 - Part 2 - English -  Word 2026-05-28 [16:42]  19'101'993  bytes Annex 2 - Overview of studies  
  [ 1064 ] Annex 20 - Part 1 - English -  Word 2026-05-28 [16:20]  1'956'160  bytes Annex 1 - Comparison between satellite parameters retained to conduct technical studies on the epfd limits in Article 22 in 1997-2000 and current state of the art  
  [ 1064 ] Annex 12 - English -  Word 2026-05-28 [15:42]  188'848  bytes Document relating to draft CPM text for WRC-27 agenda item 1.5  
  [ 1064 ] Annex 20 - English -  Word 2026-05-28 [15:23]  343'521  bytes Technical studies in response to WRC-23 minutes on Article 22 epfd limits  
  [ 1064 ] Annex 21 - English -  Word 2026-05-28 [14:10]  90'354  bytes Stage 1 process (Resolution 76 (Rev.WRC-23)) - Text elements for the Chair's Report on the development of the Stage 1 Process (Consultation Meeting Trigger) as required under Resolution 76 (Rev.WRC-23)  
  [ 1064 ] Annex 44 - English -  Word 2026-05-28 [13:53]  7'634'357  bytes Working document towards a preliminary draft ITU-R Handbook on best practices for the sustainable use of frequencies and associated non-geostationary-satellite orbits by space radiocommunication services  
  [ 1064 ] Annex 8 - English -  Word 2026-05-28 [13:48]  14'807'375  bytes Working document relating to WRC-27 agenda item 1.3 - Studies relating to the use of the frequency band 51.4-52.4 GHz to enable its use by gateway earth stations transmitting to non-geostationary-satellite orbit systems in the fixed-satellite service (Earth-to-space)  
  [ 1064 ] Annex 45 - English -  Word 2026-05-28 [11:18]  975'065  bytes Elements for a working document towards a preliminary draft new Recommendation ITU-R S.[NGSO DEORBITING] - Guidance on safe and efficient deorbit and/or disposal strategies and methodologies for non-GSO space stations/systems involved in radiocommunication services after the end of their life  
  [ 1064 ] Annex 46 - English -  Word 2026-05-28 [11:15]  45'247  bytes Work plan of the Working Group of the Plenary on Resolution ITU-R 74  
  [ 1064 ] Annex 50 - English -  Word 2026-05-27 [16:47]  50'643  bytes Note to the Director, Radiocommunication Bureau - Possible improvements of Recommendation ITU-R S.1503-4 and points for clarification regarding Recommendation ITU-R S.2157  
  [ 1064 ] Annex 35 - English -  Word 2026-05-27 [14:11]  55'731  bytes Compilation of elements regarding improvements of Recommendation ITU-R S.2157  
  [ 1064 ] Annex 25 - Part 1 - English -  Excel 2007 2026-05-27 [11:17]  27'497  bytes  
  [ 1064 ] Annex 25 - English -  Word 2026-05-27 [11:14]  10'563'285  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  
  [ 1064 ] Annex 48 - English -  Word 2026-05-27 [09:54]  54'021  bytes Working document towards a draft new Handbook on Satellite Communications and Technologies  
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