| Contributions  | 
| 
 | Number 
 | Title | Source | AI/Question 
 | Date | 
|  | [ 195 ] 
 | Elements of a working document relating to WRC-23 agenda item 1.6 addressing operational and technical studies of suborbital vehicles - Working document towards a preliminary draft new Report ITU-R M.[SUBORBITAL STUDIES] - [Regulatory, o]Operational, and technical studies of radiocommunications for suborbital vehicles | France | AI1.6 | 2021-05-03 | 
|  | [ 194 ] 
 | Working document towards draft revision of Recommendation ITU-R M.1851-1 - Mathematical models for radiodetermination radar systems antenna patterns for use in interference analyses | France |  | 2021-05-03 | 
|  | [ 193 ] 
 | Elements and technical characteristics related to WRC-23 agenda item 1.9 - Elements and technical characteristics for wideband HF systems | France | AI1.9 | 2021-05-03 | 
|  | [ 192 ] 
 | WRC-23 agenda item 1.7 - Elements regarding a space-based aeronautical VHF communications system in 117.975-137 MHz frequency band and related sharing and compatibility studies | France
          	    ,
        	    Singapore (Republic of) | AI1.7 | 2021-05-03 | 
|  | [ 191 ] 
 | Draft liaison statements to Working Parties 4C, 7B, 7D and ICAO regarding studies under WRC-23 agenda item 1.7 | France | AI1.7 | 2021-05-03 | 
|  | [ 190 ] 
 | Working document towards a preliminary draft new Recommendation ITU-R M.[15.4-15.7_GHZ_ARNS] - Characteristics of and protection criteria for terrestrial radars operating in the radiodetermination service in the frequency band 8 500-10 680 MHz | France |  | 2021-05-03 | 
|  | [ 189 ] 
 | Preliminary draft revision of Recommendation ITU-R M.1796-2 - Characteristics of and protection criteria for terrestrial radars operating in the radiodetermination service in the frequency band 8 500-10 680 MHz | France |  | 2021-05-03 | 
|  | [ 188 ] 
 | Preliminary draft revision of Recommendation ITU-R M.1638-1 - Characteristics of and protection criteria for sharing studies for radiolocation (except ground based meteorological radars) and aeronautical radionavigation radars operating in the frequency bands between 5 250 and 5 850 MHz | France |  | 2021-05-03 | 
|  | [ 187 ] 
 | Preliminary draft new Recommendation ITU-R .[RAD 92-100 GHZ] - Technical and operational characteristics of radiolocation systems operating in the frequency range 92-100 GHz and radionavigation systems operating in the frequency range 95-100 GHz | France |  | 2021-05-03 | 
|  | [ 186 ] 
 | Working document towards a preliminary draft revision to Recommendation ITU-R M.2116-0 - Technical characteristics and protection criteria for the aeronautical and maritime mobile service systems operating within the 4 400-4 990 MHz frequency range | Australia
          	    ,
        	    Austria
          	    ,
        	    Belgium
          	    ,
        	    Croatia (Republic of)
          	    ,
        	    Estonia (Republic of)
          	    ,
        	    France
          	    ,
        	    Germany (Federal Republic of)
          	    ,
        	    Hungary
          	    ,
        	    Korea (Republic of)
          	    ,
        	    Latvia (Republic of)
          	    ,
        	    Lithuania (Republic of)
          	    ,
        	    Luxembourg
          	    ,
        	    Netherlands (Kingdom of the)
          	    ,
        	    Poland (Republic of)
          	    ,
        	    Romania
          	    ,
        	    Slovenia (Republic of)
          	    ,
        	    Turkey
          	    ,
        	    United Kingdom of Great Britain and Northern Ireland |  | 2021-05-03 | 
|  | [ 185 ] 
 | Liaison Note to ITU - Draft revision of Recommendation ITU-R M.1371-5 - Technical characteristics for an automatic identification system using time division multiple access in the VHF maritime mobile frequency band | International Association of Marine Aids to Navigation and Lighthouse Authorities |  | 2021-05-03 | 
|  | [ 184 ] 
 | Comments on the working document towards an annex to liaison statement to Working Party 5D on WRC-23 agenda item 1.1 | Egypt (Arab Republic of) | AI1.1 | 2021-05-03 | 
|  | [ 183 ] 
 | Proposed improvements to working document towards a preliminary draft new Report ITU-R M.[FOD 92-100 GHZ] - Technical and operational characteristics of the foreign object debris detection system operating in the frequency range 92-100 GHz | Hitachi Kokusai Electric Inc. | Q260/5 | 2021-05-03 | 
|  | [ 182 ] 
 | Proposed improvement to working document towards a preliminary draft new Recommendation ITU-R M.[RAD 92-100 GHZ] - Technical and operational characteristics of radiolocation systems operating in the frequency range 92-100 GHz and radionavigation systems operating in the frequency range 95-100 GHz | Hitachi Kokusai Electric Inc. | Q260/5 | 2021-05-03 | 
|  | [ 181 ] 
 | Proposed modification to Working document towards a preliminary draft new Report ITU-R M.[FOR_EESS_SHARE] - Sharing and compatibility studies between earth exploration satellite service sensors and foreign object debris detection system in the frequency range 92 100 GHz | Hitachi Kokusai Electric Inc. | Q260/5 | 2021-05-03 | 
|  | [ 180 ] 
 | Proposed improvements to reply liaison statement to Working Party 7C (copy to Working Party 7D for information) - Working documents towards a preliminary draft new Reports ITU-R 
M.[FOD 92-100 GHz] and M.[FOD_EESS_SHARE] | Hitachi Kokusai Electric Inc. | Q260/5 | 2021-05-03 | 
|  | [ 179 ] 
 | Proposals on the working document towards a preliminary draft new Report ITU-R M.[NON-SAFETY AMS] | France
          	    ,
        	    Germany (Federal Republic of) |  | 2021-04-30 | 
|  | [ 178 ] 
 | Working document towards draft CPM text to WRC-23 for agenda item 1.11 | Germany (Federal Republic of) | AI1.11 | 2021-04-30 | 
|  | [ 177 ] 
 | Digital voice communication in the VHF maritime band | Estonia (Republic of)
          	    ,
        	    Netherlands (Kingdom of the) |  | 2021-04-30 | 
|  | [ 176 ] 
 | Working document towards a preliminary draft new Recommendation ITU-R M.[CNPC_CHAR_5GHZ] - Characteristics and Protection Criteria of Terrestrial and Satellite Unmanned Aircraft System Control and Non-Payload Communications Links operating in the aeronautical mobile (route) service and aeronautical mobile satellite (R) Service in the band 5 030-5 091 MHz | United States of America |  | 2021-04-30 | 
|  | [ 175 ] 
 | Working document towards a preliminary draft new Report/Recommendation ITU-R M.[UAS CNPC_CHAR] - Characteristics of unmanned aircraft system control and non-payload Earth stations for use with space stations operating in the Fixed Satellite Service | United States of America |  | 2021-04-30 | 
|  | [ 174 ] 
 | Preliminary draft new Report ITU-R M.[UA_PFD] - Review of power flux-density limits in accordance with resolves 16 of Resolution 155 (Rev.WRC-19) | United States of America |  | 2021-04-30 | 
|  | [ 173 ] 
 | Working document towards draft CPM text for WRC-23 agenda item 1.9 - Aeronautical Wideband HF | United States of America |  | 2021-04-30 | 
|  | [ 172 ] 
 | Working document towards preliminary draft new Report ITU-R M.[AERO-WIDEBAND-HF] - Aeronautical Wideband HF | United States of America |  | 2021-04-30 | 
|  | [ 171 ] 
 | Draft Work plan for WRC-23 agenda  item 1.9 | United States of America |  | 2021-04-30 | 
|  | [ 170 ] 
 | Prreliminary draft revision of Recommendation ITU-R M.1730-1 | United States of America |  | 2021-04-30 | 
|  | [ 169 ] 
 | Working document toward PDN Recommendation ITU-R M.[AMS-CHARACTERISTICS_1780-1850 MHZ] | United States of America |  | 2021-04-30 | 
|  | [ 168 ] 
 | Reply liaison statement to Working Party 4C for agenda item 1.18 | United States of America |  | 2021-04-30 | 
|  | [ 167 ] 
 | Reply liaison statement to Working Party 5D for agenda item 1.2 | United States of America |  | 2021-04-30 | 
|  | [ 166 ] 
 | Revisions to preliminary draft revision of Recommendation ITU-R M.1796-2 | United States of America |  | 2021-04-30 | 
|  | [ 165 ] 
 | Draft revision of Recommendation ITU-R M.1465-3 | United States of America |  | 2021-04-30 | 
|  | [ 164 ] 
 | Updates to working document towards a preliminary draft new Report ITU-R [NON-SAFETY AMS] | United States of America |  | 2021-04-30 | 
|  | [ 163 ] 
 | Revision to Annex 31 to the Working Party 5B Chairman's Report - Working document toward a preliminary draft new Report ITU-R M.[LED-EMI] - Conditions for the protection of radio receivers installed onboard vessels against electromagnetic interference from LED lighting systems and other unintended sources | United States of America |  | 2021-04-30 | 
|  | [ 162 ] 
 | Preliminary draft revision of Recommendation ITU-R M.2135-0 | United States of America |  | 2021-04-30 | 
|  | [ 161 ] 
 | [Preliminary] draft revision of Recommendation ITU-R M.2092-0 | United States of America |  | 2021-04-30 | 
|  | [ 160 ] 
 | Preliminary dratf revision of Recommendation ITU-R M.1638-1 - Characteristics of and protection criteria for sharing studies for radiolocation (except ground based meteorological radars) and aeronautical radionavigation radars operating in the frequency bands between 5 250 and 5 850 MHz | United States of America |  | 2021-04-30 | 
|  | [ 159 ] 
 | Proposed updates to working document towards a preliminary draft new Report ITU-R M.[RADAR SIMULATIONS] - Simulations of performance for specific primary surveillance radars | United States of America |  | 2021-04-30 | 
|  | [ 158 ] 
 | Working document towards a preliminary draft new Recommendation ITU-R M.[AMRS-VDL] - Characteristics and protection criteria for the International Civil Aviation Organization standardized VHF datalink Mode 2 systems operating in the aeronautical mobile (route) service in the frequency band 136-137 MHz | United States of America |  | 2021-04-30 | 
|  | [ 157 ] 
 | Working document towards a preliminary draft new Report ITU-R M.[SUBORBITAL STUDIES] - [Regulatory, o] Operational, and technical studies of radiocommunications for suborbital vehicles | United States of America |  | 2021-04-30 | 
|  | [ 156 ] 
 | Work plan for WRC-23 agenda item 1.6 | United States of America |  | 2021-04-30 | 
|  | [ 155 ] 
 | Working document towards preliminary draft revised Recommendation  ITU-R  M.1849-2 | United States of America |  | 2021-04-30 | 
|  | [ 154 ] 
 | Proposed liaison statement to Working Party 5D - Updated information for preparations for WRC-23 agenda item 1.4 - Characteristics of meteorological radars contained in Recommendation ITU-R M.1849 | United States of America |  | 2021-04-30 | 
|  | [ 153 ] 
 | Prelimimary draft revision of Recommendation ITU-R M.585-8 - Assignment and use of identities in the maritime mobile service | Germany (Federal Republic of)
          	    ,
        	    Estonia (Republic of)
          	    ,
        	    France
          	    ,
        	    Malta
          	    ,
        	    Netherlands (Kingdom of the)
          	    ,
        	    Switzerland (Confederation of) |  | 2021-04-29 | 
|  | [ 152 ] 
 | Proposed working document for a prelliminary draft revision to Recommendation IUT-R M.2116-0 - Technical characteristics and protection criteria for the aeronautical mobile service systems operating within the 4 400-4 990 MHz frequency range | United States of America |  | 2021-04-29 | 
|  | [ 151 ] 
 | Draft reply liaison statement to Working Party 5D - WRC-23 agenda item 1.1 - Characteristics of aeronautical systems and maritime systems operating in or adjacent to the frequency band 4 800-4 990 MHz | United States of America | AI1.1 | 2021-04-29 | 
|  | [ 150 ] 
 | Working document towards a preliminary draft new Recommendation ITU-R M.[15.4-15.7 _GHZ_ARNS] - Characteristics of and protection criteria for radars operating in the aeronautical radionavigation service in the frequency band 15.4-15.7 GHz | United States of America |  | 2021-04-29 | 
|  | [ 149 ] 
 | Working document towards a preliminary draft new Report ITU-R M.[UA-AIRBORNE-DAA] - Guidance on suitable frequency bands and services to be used by airborne unmanned aircraft detect-and-avoid non-cooperative systems | United States of America |  | 2021-04-29 | 
|  | [ 148 ] 
 | An example of a framework for revisions to Resolution 155 (Rev.WRC-19) in support of studies under WRC-23 agenda item 1.8 | United States of America | AI1.8 | 2021-04-29 | 
|  | [ 147 ] 
 | WRC-23 agenda item 1.1 - Technical characteristics of aeronautical mobile service and maritime mobile service systems operating within the 4800-4990 MHz frequency range for sharing studies | Russian Federation | AI1.1 | 2021-04-29 | 
|  | [ 146 ] 
 | Revision of working document towards a preliminary draft new Report ITU-R [NON-SAFETY AMS] - [ELEMENTS TO A WORKING DOCUMENT RELATED TO WRC-23 AGENDA ITEM 1.10] - Technical study for new non-safety aeronautical mobile applications | Russian Federation | AI1.10 | 2021-04-29 | 
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