ITU-R Questions

66/1

Methods and algorithms for frequency planning  
Note - Suppressed on 27/10/08 (CACE/463)

202-2/1

Identification and measurement of various interference sources to analogue and digital radiocommunications systems (according to their originating mechanism and interference effect)  
Note - Suppressed on 26/01/10 (CACE/498)

205-2/1

Long-term strategies for spectrum utilization  

206/1

Strategies for economic approaches to national spectrum management and their financing  
Note - Suppressed on 23/09/11 (CACE/550 )

207/1

Assessment, for spectrum planning and strategic development, of the benefits arising from the use of the radio spectrum  
Note - Suppressed on 27/10/08 (CACE/463)

208-1/1

Alternative methods of national spectrum management  

209-1/1

Parameters of radio systems and equipment required for spectrum management and the efficient use of the radio spectrum  
Note - Suppressed on 23/09/11 (CACE/550 )

210-4/1

Wireless power transmission  

211/1

Unwanted emissions  
Note - Suppressed on 27/10/08 (CACE/463)

212/1

Development of method(s) for the determination of the coordination area around earth stations  
Note - Suppressed on 27/10/08 (CACE/463)

213/1

Technical and operating parameters and spectrum requirements for short-range devices  
Note - Suppressed on 27/10/08 (CACE/463)

214/1

Monitoring of digital broadcasting signals  
Note - Suppressed on 13/11/12 (CACE/593 )

215/1

Monitoring of the radio coverage of land mobile networks to verify compliance with a given license  
Note - Suppressed on 26/01/10 (CACE/498)

216-1/1

Spectrum redeployment as a method of national spectrum management
 

217/1

Compatibility between short range devices operating within the band 59-64 GHz and industrial, scientific and medical (ISM) applications operating in the band 61-61.5 GHz  
Note - Suppressed on 27/10/08 (CACE/463)

218-1/1

Techniques for measurement of radiation from high data rate telecommunication systems using wired electrical power supply  
Note - Suppressed on 23/09/11 (CACE/550 )

219/1

Remote access to radio monitoring equipment of other administrations  
Note - Suppressed on 25/01/11 (CACE/523)

220-1/1

Identification and characterization of various interference sources to analogue and digital radiocommunication systems (according to their originating mechanism and interference effect)  
Note - Suppressed on 26/01/10 (CACE/498)

221-2/1

Compatibility between radiocommunication systems and high data rate telecommunication systems using wired electrical power supply  

222/1

Definition of the spectral properties of transmitter emissions  

223/1

Guidance on the regulatory framework for national spectrum management  
Note - Suppressed on 27/10/08 (CACE/463)

224/1

Technical convergence with respect to terrestrial fixed, mobile, and broadcasting interactive multimedia applications and the associated regulatory environment  
Note - Suppressed on 24/08/15 (CACE/751)

225/1

Inspection of radio stations to verify compliance with licence parameters  
Note - Suppressed on 26/01/10 (CACE/498)

226/1

Spectrum management framework related to the introduction of ultra-wideband devices  
Note - Suppressed on 27/10/08 (CACE/463)

227/1

Compatibility between ultra-wideband devices and radiocommunication services  
Note - Suppressed on 27/10/08 (CACE/463)

228/1

Possibility and relevance of including in the Radio Regulations frequency bands above 3 000 GHz  
Note - Suppressed on 27/10/08 (CACE/463)

229/1

Improving the international spectrum regulatory framework  
Note - Suppressed on 27/10/08 (CACE/463)

230/1

Improved measurement methods for unwanted emissions of primary radars using magnetrons  
Note - Suppressed on 23/09/11 (CACE/550)

231/1

Measuring technique for measuring the noise floor in radio applications  
Note - Suppressed on 26/01/10 (CACE/498)

232/1

Methods and techniques used in space radio monitoring  

233-1/1

Measurement of spectrum occupancy  
Note - Suppressed on 28/09/17 (CACE/836)

234/1

Alternative techniques for radiolocation determination  
Note - Suppressed on 23/09/11 (CACE/550 )

235/1

Spectrum monitoring evolution  

236/1

Impact on radiocommunication systems from wireless and wired data transmission technologies used for the support of power grid management systems  

237/1

Technical and operational characteristics of the active services operating in the range 275-1 000 GHz  

238/1

Characteristics for use of visible light for broadband communications  

239/1

Electromagnetic field measurements to assess human exposure  

240/1

Assessment of spectrum efficiency and economic value  

241/1

Methodologies for assessing or predicting spectrum availability  

242/1

Spectrum management framework for the introduction of Ground- and Wall- Penetrating Radar (GPR/WPR) imaging systems
 

243/1

Impact of unintentional radio frequency energy generated by electrical or electronic apparatus to the radiocommunication services  

201-7/3

Radiometeorological data required for the planning of terrestrial and space communication systems and space research application
 

202-5/3

Methods for predicting propagation over the surface of the Earth  

203-9/3

Propagation prediction methods for terrestrial broadcasting, fixed (broadband access) and mobile services using frequencies above 30 MHz
 

204-6/3

Propagation data and prediction methods required for terrestrial line-of-sight systems
 

205-2/3

Propagation data and prediction methods required for trans-horizon systems  

206-4/3

Propagation data and prediction methods for fixed- and broadcasting-satellite services
 

207-5/3

Propagation data and prediction methods for satellite mobile and radiodetermination services above about 0.1 GHz  

208-6/3

Propagation factors in frequency sharing issues affecting space radiocommunication services and terrestrial services  

209-2/3

Variability and risk parameters in system performance analysis  

211-8/3

Propagation data and propagation models in the frequency range 300 MHz to 450 GHz for the design of short-range wireless radiocommunication systems  

212-3/3

Ionospheric properties  

213-4/3

The short-term forecasting of operational parameters for trans-ionospheric radiocommunication and radionavigation services  

214-6/3

Radio noise  

218-6/3

Ionospheric influences on satellite systems  

221-2/3

Propagation by way of sporadic E and other ionization  
Note - Suppressed on 28/07/15 (CACE/744)

222-5/3

Measurements and data banks of ionospheric characteristics and radio noise  

225-7/3

The prediction of propagation factors affecting systems at LF and MF including the use of digital modulation techniques
 

226-5/3

Ionospheric and tropospheric characteristics along satellite-to-satellite paths  

227-1/3

HF channel simulation  
Note - Suppressed on 17/02/12 (CACE/562)

228-3/3

Propagation data required for the planning of radiocommunication systems operating above 275 GHz
 

229-3/3

Prediction of sky-wave propagation conditions, signal intensity, circuit performance and reliability at frequencies between about 1.6 and 30 MHz, in particular for systems using digital modulation techniques
 

230-3/3

Prediction methods and models applicable to power line telecommunication systems
 

231-1/3

The effect of electromagnetic emissions from man-made sources on the radiocommunication systems and networks  

232-1/3

The effect of nanostructure materials on propagation  
Note - Suppressed on 22/11/17 (CACE/846)

233-1/3

Methods for the prediction of propagation path losses between an airborne platform and a satellite, ground terminal or another airborne platform  

234/3

Computation of ionospheric scintillation indices  

235-1/3

Impact of engineered electromagnetic surfaces on radiowave propagation  

236/3

Use of machine learning methods for radiowave propagation studies  

42-1/4

Characteristics of antennas at earth stations in the fixed-satellite service  

46-3/4

Preferred multiple-access characteristics in the fixed-satellite service  

70-1/4

Protection of the geostationary-satellite orbit against unacceptable interference from transmitting earth stations in the fixed-satellite service at frequencies above 15 GHz  

73-2/4

Availability and interruptions to traffic on digital paths in the fixed satellite service  

75-4/4

Performance objectives of international digital transmission links in the fixed-satellite and mobile-satellite services  
Note - Suppressed on 15/01/18 (CACE/853)

83-6/4

Efficient use of the radio spectrum and frequency sharing within the mobile-satellite service  

84-4/4

Use of non-geostationary-satellite orbits in mobile-satellite services  

87-4/4

Transmission characteristics for a mobile-satellite communication system  

88-1/4

Propagation and mobile earth station antenna characteristics for mobile-satellite services  

91-1/4

Technical and operating characteristics of the radiodetermination-satellite service  

109-1/4

Global Maritime Distress and Safety System requirements for mobile-satellite systems operating in the bands 1 530-1 544 MHz and 1 626.5-1 645.5 MHz  

110-1/4

Interference to the aeronautical mobile-satellite (R) service  

201-1/4

Frequency sharing between mobile-satellite services and other services  

203-1/4

The impact of using small antennas on the efficient use of the geostationary-satellite orbit  

205-1/4

Frequency sharing between non-geostationary satellite feeder links in the fixed-satellite service used by the mobile-satellite service  

208/4

Use of statistical and stochastic methods in evaluation of interference between satellite networks in the fixed-satellite service  

209/4

The use of frequency bands allocated to the fixed-satellite service for both the up and down links of geostationary-satellite systems  

210-1/4

Technical characteristics for mobile earth stations operating with global non geostationary-satellite systems in the mobile-satellite service in the band 1-3 GHz  

211-2/4

Interference criteria and calculation methods for the mobile-satellite service  

214/4

Technical implications of steerable and reconfigurable satellite beams  

217-2/4

Interference to the radionavigation-satellite service in the ICAO global navigation satellite system  

218-2/4

On-board processing in mobile-satellite service and fixed-satellite service systems  

227/4

Technical and operational characteristics of emergency communications in the mobile-satellite service  

231/4

Sharing between networks of the fixed-satellite service using non-geostationary satellites and other networks of the fixed-satellite service  

233/4

Dedicated user digital satellite communications systems and their associated architectures  

236/4

Interference criteria and calculation methods for the fixed-satellite service  

244/4

Sharing between feeder links of the mobile-satellite (non-geostationary) service in the band 5 091-5 250 MHz and the aeronautical radionavigation service in the band 5 000-5 250 MHz  
Note - Suppressed on 26/09/23 (CACE/1078)

245-1/4

Out-of-band and spurious emission limits  

248/4

Frequency sharing between systems in the fixed-satellite service and wireless digital networks around 5 GHz  

263-1/4

Performance objectives of digital links in the fixed-satellite service for transmission of Internet or higher layer Protocol packets  

264/4

Technical and operational characteristics of networks of the fixed-satellite service operating above 275 GHz  

266/4

Technical characteristics of high-density fixed-satellite service earth stations operating with geostationary satellite orbit fixed-satellite service networks in the 20/30 GHz bands  

267/4

Technical and operational considerations relating to the advance publication, coordination and notification of fixed-satellite networks  

268/4

Development of methodologies for the assessment of satellite unwanted emission levels before launch  

270-1/4

Fixed-satellite service systems using very wideband spreading signals  

271/4

Interference between satellite news gathering (SNG) carriers by unintentional access  

272/4

Frequency sharing between the FSS and the space research service in the 37.5-38 GHz and 40-40.5 GHz bands  

273/4

Support of the modernization of civil aviation telecommunication systems and the extension of telecommunication systems to remote and developing regions with current and planned satellite networks  

274/4

Technical methods for improving the spectrum/orbit utilization  

275/4

Performance objectives of digital links in the fixed-satellite and mobile-satellite services forming elements of the Next Generation Network  

276/4

Availability of digital paths in mobile-satellite services  

277-1/4

Performance objectives for digital fixed-satellite and mobile-satellite services with variable bit-rate paths  

278/4

Use of operational facilities to meet power flux-density limitation under Article 21 of the Radio Regulations  

279/4

Satellite broadcasting of high definition television  

280/4

Receiving earth station antennas for the broadcasting satellite service  

281/4

Digital techniques in the broadcasting-satellite service (sound and television)  

282/4

Frequency sharing issues related to the introduction of the broadcasting-satellite service (sound) in the frequency range 1-3 GHz  

283/4

Sharing studies between high-definition television in the broadcasting-satellite service and other services  

284/4

Spectrum management issues related to the introduction of the broadcasting-satellite service (sound) in the frequency range 1-3 GHz  
Note - Suppressed on 28/01/2025 (CACE/1130)

285/4

Digital broadcasting of multiple services and programmes in the broadcasting-satellite service  

286/4

Contributions of the mobile and amateur services and associated satellite services to the improvement of disaster communications  

287/4

Technical and operational characteristics for packet network transmission in mobile-satellite services  

288/4

Characteristics and operational requirements of radionavigation-satellite service (space-to-Earth, space-to-space, Earth-to-space) systems  

289/4

Interactive satellite broadcasting systems (television, sound and data)  

290/4

Broadcasting-satellite means for public warning, disaster mitigation and relief  

291/4

System architecture and performance aspects on integrated MSS systems  

292/4

UHDTV satellite broadcasting systems  

293/4

Antenna radiation diagrams/patterns for small (D/? around 30) earth station antennas used in fixed-satellite and broadcasting-satellite systems  

1-6/5

Interference protection ratios and minimum field strengths required in the land mobile services
 

7-7/5

Characteristics of equipment for the land mobile service between 30 and 6 000 MHz  

35-1/5

Efficient use of the radio spectrum by radar stations in the radiodetermination service  
Note - Suppressed on 13/04/11 (CACE/536)

37-6/5

Digital land mobile systems for specific applications  

48-7/5

Techniques and frequency usage in the amateur service and amateur-satellite service
 

62-2/5

Interference to the aeronautical mobile and aeronautical radionavigation services  

77-9/5

Consideration of the needs of developing countries in the development and implementation of the terrestrial component of IMT  

93-2/5

Automation of MF, HF and VHF maritime mobile communications  
Note - Suppressed on 13/04/11 (CACE/536)

96-2/5

Improved efficiency in the use of the band 156-174 MHz by stations in the maritime mobile service with a view to enhancing maritime safety and port security  
Note - Suppressed on 13/04/11 [CACE/536]

98/5

Transmission of digital data for the updating of electronic chart display systems  
Note - Suppressed on 13/04/11 [CACE/536]

99-1/5

Interference due to intermodulation products in the land mobile services between 25 and 6 000 MHz  
Note - Suppressed on 19/03/12 (CACE/568)

101-5/5

Quality of service requirements in the land mobile service  

106-1/5

Criteria for sharing between the broadcasting-satellite service (sound) and complementary terrestrial broadcasting and the mobile and amateur services within the range 1-3 GHz  
Note - Suppressed on 19/03/12 (CACE/568)

110-3/5

Reference radiation patterns of point-to-point fixed wireless system antennas for use in sharing studies  

111-3/5

Sharing criteria between the broadcasting-satellite service (sound and television) and the fixed service  
Note - Suppressed on 19/03/12 (CACE/568)

113-2/5

Frequency sharing and compatibility between systems in the fixed service and systems of the Earth exploration-satellite service and the space research service  
Note - Suppressed on 19/03/12 (CACE/568)

118-4/5

Sharing criteria between the mobile-satellite service and the fixed service  
Note - Suppressed on 19/03/12 (CACE/568)

133-1/5

Sharing criteria between the fixed and land mobile services in the frequency bands above about 0.5 GHz  
Note - Suppressed on 19/03/12 (CACE/568)

145-2/5

Characteristics required for high-speed data transmission over HF radio circuits  
Note - Suppressed on 19/03/12 (CACE/568)

158-1/5

Packet data transmission protocols for systems operating below about 30 MHz  
Note - Suppressed on 19/03/12 (CACE/568)

202-3/5

Unwanted emissions of primary radar systems  
Note - Suppressed on 01/10/15 (CACE/756)

205-6/5

Intelligent Transport Systems  
Note - Suppressed on 12/12/23 (CACE/1096)

208-1/5

Evolution of land mobile systems towards IMT-2000 and systems beyond IMT-2000  
Note - Suppressed on 19/03/12 (CACE/568)

209-7/5

Use of the mobile, amateur and the amateur-satellite services in support of disaster radiocommunications  

212-4/5

Nomadic wireless access systems including radio local area networks  

215-4/5

Frequency bands, technical characteristics, and operational requirements for fixed wireless access systems in the fixed and/or land mobile services  

216-2/5

Compatibility of radionavigation, earth exploration-satellite (active), space research (active), mobile, and radiolocation services operating in the band 5 350-5 650 MHz and compatibility between the radionavigation and radiolocation services in the band 2 900-3 100 MHz  
Note - Suppressed on 13/04/11 (CACE/536)

223-2/5

Internet protocol applications over mobile systems  
Note - Suppressed on 13/04/11 (CACE/536)

224-2/5

Adaptive antennas  
Note - Suppressed on 06/07/09 (CACE/484)

225/5

Interference to the aeronautical and maritime mobile services in the HF bands by unauthorized stations  
Note - Suppressed on 01/10/15 (CACE/756)

226-1/9

Sharing feasibility of stations in the fixed service with earth stations on board vessels operating in the fixed-satellite service in the band 5 925-6 425 MHz and other uplink frequency bands at 6 GHz and 14 GHz  
Note - Suppressed on 13/04/11 [CACE/536]

229-6/5

Further development of the terrestrial component of IMT  

230-3/5

Sofware defined radios  
Note - Suppressed on 02/02/15 (CACE/713 )

231/5

Operation of wideband aeronautical telemetry in bands above 3 GHz  
Note - Suppressed on 01/10/15 (CACE/756)

232/5

Universal shipborne automatic identification system  
Note - Suppressed on 13/04/11 (CACE/536)

233/5

Criteria for sharing between stations in the fixed service and stations in the aeronautical mobile service in bands between about 37 GHz and 50 GHz  
Note - Suppressed on 19/03/12 (CACE/568)

235/5

Protection criteria for aeronautical and maritime systems  

237/5

Characteristics and protection criteria of radars operating in the radiodetermination service in the VHF frequency band  
Note - Suppressed on 13/04/11 (CACE/536)

238-3/5

Mobile broadband wireless access systems  

240/5

Technical and operational characteristics and spectrum requirements of high-frequency surface wave radar systems operating in the frequency range 3 to 50 MHz  
Note - Suppressed on 01/10/15 (CACE/756)

241-4/5

Cognitive radio systems in the mobile service  

242-2/5

Reference radiation patterns of omnidirectional and sectoral antennas for the fixed and mobile services for use in sharing studies  

243/5

System characteristics and sharing criteria for the fixed service operating in frequency bands below 1 GHz  
Note - Suppressed on 19/03/12 (CACE/568)

244/5

Improvements to Recommendation ITU-R F.758  
Note - Suppressed on 13/04/11 (CACE/536)

245/5

Fixed service applications using frequency bands above 3 000 GHz  
Note - Suppressed on 11/02/13 (CACE/606)

246-1/5

Technical characteristics and channelling requirements for adaptive HF systems  

247-1/5

Radio-frequency arrangements for fixed wireless systems  

248/5

Technical and operational characteristics for systems in the fixed service used for disaster mitigation and relief  

249/5

Technical characteristics and operational requirements of wireless avionics intra-communications (WAIC)  
Note - Suppressed on 01/10/15 (CACE/756)

250-1/5

Mobile wireless access systems providing telecommunications for a large number of ubiquitous sensors and/or actuators scattered over wide areas as well as machine to machine communications in the land mobile service  

251/5

Technical and operational aspects of passive and active base station antennas for IMT systems  
Note - Suppressed on 01/10/15 (CACE/756)

252/5

Frequency sharing and compatibility between systems in the fixed service and systems in other services  

253/5

Fixed service use and future trends  

254/5

Operation of short-range radiocommunication public access system supporting hearing aid systems  

255/5

Performance and availability objectives and requirements for fixed wireless systems, including packet-based systems
 
Note - Suppressed on 19/11/19 (CACE/937)

256-2/5

Technical and operational characteristics of the land mobile service in the frequency range 275-1 000 GHz  

257-2/5

Technical and operational characteristics of stations in the fixed service in the frequency range 275-1 000 GHz  

258/5

Technical and operational principles for HF sky-wave communication stations to improve the man-made noise HF environment
 

259/5

Operational and radio regulatory aspects for planes operating in the upper level of the atmosphere
 

260/5

Coexistence analysis between foreign object debris detection systems operating in the frequency range 92 to 100 GHz and Earth exploration-satellite service sensors in-band and in adjacent bands
 

261/5

Radiocommunication requirements for connected automated vehicles (CAV)  
Note - Suppressed on 12/12/23 (CACE/1096)

262-1/5

Usage of the terrestrial component of IMT systems for specific applications  

263/5

Studies related to the further development of RSTT  

264/5

Studies related to intelligent transport systems, including connected automated vehicles and future applications  

265/5

Coexistence of VHF data exchange system with a ranging-mode in the VHF data exchange system  

266/5

Introduction of digital voice communications in the VHF maritime frequency channels  

1/6

Digital image formats for programme production and exchange for digital television broadcasting  
Note - Suppressed on 16/04/10 (CACE/506)

2/6

Audio metering characteristics suitable for use in digital sound production  
Note - Suppressed on 27/01/12 (CACE/557)

3/6

Digital broadcasting of multiple services and programmes in the broadcasting-satellite service  
Note - Suppressed on 25/03/09 (CACE/475)

4-2/6

Planning parameters for digital television broadcasting using terrestrial channels  
Note - Suppressed on 14/10/15 (CACE/757)

5-1/6

Serial data transport mechanism for packetized data within a television production studio based on, and compatible with, Recommendations ITU-R BT.656 and ITU-R BT.1120  
Note - Suppressed on 31/03/09 (CACE/476)

6-1/6

Standards for digital high-definition television coding  
Note - Suppressed on 31/03/09 (CACE/476)

7/6

Interface to webcasting and its supporting data services  
Note - Suppressed on 31/03/09 (CACE/476)

8/6

Methods for the assessment of automated audio metadata extraction systems  
Note - Suppressed on 16/04/10 (CACE/506)

9/6

Universal transmitters and retransmitters for both analogue and digital terrestrial TV broadcasting  
Note - Suppressed on 20/10/19 (CACE/936)

10/6

Enhanced television  
Note - Suppressed on 09/10/07 (CACE/434)

11/6

Polarization of emissions in the terrestrial broadcasting service  
Note - Suppressed on 20/10/19 (CACE/936)

12-4/6

Generic bit-rate reduction coding of digital video signals for production, for contribution, for primary and secondary distribution, for emission and for related applications
 

13/6

Multimedia evolution and common content format  
Note - Suppressed on 18/09/09 (CAR/475, CACE/490)

14/6

Digital and analogue-digital TV receivers and receiving antenna characteristics required for the terrestrial TV broadcasting frequency planning  
Note - Suppressed on 14/10/15 (CACE/757)

15-2/6

Large screen digital imagery (LSDI)  
Note - Suppressed on 14/10/15 (CACE/757)

16-2/6

Digital interactive broadcasting  
Note - Suppressed on 14/10/15 (CACE/757)

17/6

Data broadcasting in the digital broadcasting environment  
Note - Suppressed on 31/03/09 (CACE/476)

19-1/6

Bit-rate reduction coding of audio signals for broadcasting applications  

20/6

Digital HDTV studio interfaces  
Note - Suppressed on 31/03/09 (CACE/476)

21/6

Characteristics of receiving systems in the broadcasting-satellite service (sound and television)  
Note - Suppressed on 12/01/12 (CACE/554 )

22-1/6

Satellite orbits and space station technology for the broadcasting-satellite service (sound and television)  
Note - Suppressed on 17/12/10 (CACE/519)

23/6

Characteristics of systems in the broadcasting-satellite service (sound) for individual reception by means of portable and vehicular receivers  
Note - Suppressed on 12/01/12 (CACE/554)

24-1/6

Recording of television programmes on optical or magneto-optical disks for international exchange  
Note - Suppressed on 09/10/07 (CACE/434)

25-1/6

Unified identification data for international exchange and archival of sound-programme and television recordings and of films for television  
Note - Suppressed on 09/10/07 (CACE/434)

26-1/6

Interactive satellite broadcasting systems (television, sound and data)  
Note - Transferred to SG 4 (289/4)

27/6

Receivers for sound broadcasting below 30 MHz  
Note - Suppressed on 14/10/15 (CACE/757)

28/6

Short-distance broadcasting in band 7 (HF) in the Tropical Zone  
Note - Suppressed on 09/10/07 (CACE/434)

29/6

Transmission of supplementary information with a single transmitter in frequency-modulation sound broadcasting  
Note - Suppressed on 14/10/15 (CACE/757)

30/6

Transmitting and receiving antennas at VHF and UHF  

31-1/6

Digital terrestrial television broadcasting  
Note - Suppressed on 18/03/11 (CACE/533)

32-1/6

Protection requirements of broadcasting systems against interference from radiation caused by wired telecommunication systems, from emissions of industrial, scientific and medical equipment, and from emissions of short-range devices  

33/6

Standards for digital audio coding and interfaces  
Note - Suppressed on 31/03/09 (CACE/476)

34-4/6

File formats and transport for the exchange of audio, video, data and metadata materials in the professional broadcast environments  

35/6

Tolerable round-trip time delay for sound-programme and television broadcast programme inserts  
Note - Suppressed on 09/10/07 (CACE/434)

36/6

Standards for the high-definition television studio and for international programme exchange  
Note - Suppressed on 16/04/10 (CACE/506)

37/6

System parameters for multichannel sound systems  
Note - Suppressed on 16/04/10 (CACE/506)

38/6

Standards for the digital encoding of colour television signals  
Note - Suppressed on 09/10/07 (CACE/434)

39/6

Standards for digital audio techniques  
Note - Suppressed on 16/04/10 (CACE/506)

40-3/6

Extremely high-resolution imagery  
Note - Suppressed on 24/06/19 (CACE/908)

41/6

Auxiliary signals for digital television codecs to assist editing and cascading  
Note - Suppressed on 31/03/09 (CACE/476)

42/6

Interfaces for digital video signals  
Note - Suppressed on 31/03/09 (CACE/476)

43/6

Digital coding for multi-programme television in contribution and distribution circuits  
Note - Suppressed on 31/03/09 (CACE/476)

44-4/6

Objective image quality parameters and associated measurement and monitoring methods for digital television images  

45-6/6

Broadcasting of multimedia and data applications  

46-1/6

User requirements for metadata related to digital production, post production, recording and archiving of sound and television programmes in broadcasting  
Note - Suppressed on 14/10/15 (CACE/757)

47/6

Prevention of photosensitive epileptic seizures caused by television  
Note - Suppressed on 16/04/10 (CACE/506)

48/6

In-service monitoring of perceived audio quality for distribution and broadcasting networks  
Note - Suppressed on 14/10/15 (CACE/757)

49-1/6

Conditional-access broadcasting systems  

50/6

Evaluating fields from terrestrial broadcasting transmitting systems operating in any frequency band for assessing exposure to non-ionizing radiation  
Note - Suppressed on 09/10/07 (CACE/434)

51/6

Sky-wave reception in LF, MF and HF broadcasting  
Note - Suppressed on 14/10/15 (CACE/757)

52-1/6

Coverage in LF, MF and HF broadcasting  
Note - Suppressed on 20/10/19 (CACE/936)

53/6

Standards for the transmission of several sound signals in one television channel in terrestrial or satellite broadcasting including high-definition and enhanced definition television systems  
Note - Suppressed on 14/10/15 (CACE/757)

54/6

Sound systems for the hearing impaired  
Note - Suppressed on 09/10/07 (CACE/434)

55/6

Subjective assessment of sound quality in broadcasting using digital techniques  
Note - Suppressed on 14/10/15 (CACE/757)

56-4/6

Characteristics of terrestrial digital sound/multimedia broadcasting systems for reception by vehicular, portable and fixed receivers
 

57/6

Frequency sharing issues related to the introduction of the broadcasting-satellite service (sound) in the frequency range 1-3 GHz  
Note - Suppressed on 25/03/09 (CACE/475)

58/6

Recording of sound programmes for international exchange  
Note - Suppressed on 16/04/10 (CACE/506)

59-1/6

Archiving of sound programmes in broadcasting  
Note - Suppressed on 14/10/15 (CACE/757)

60/6

Digital broadcasting at frequencies below 30 MHz  
Note - Suppressed on 14/10/15 (CACE/757)

61/6

Spectrum management issues related to the introduction of the broadcasting-satellite service (sound) in the frequency range 1-3 GHz  
Note - Suppressed on 25/03/09 (CACE/475)

62/6

Subjective assessment of small, medium and large impairments in sound quality  
Note - Suppressed on 20/10/19 (CACE/936)

63/6

Calibration of the listening level for headphones in subjective listening tests  
Note - Suppressed on 16/04/10 (CACE/506)

64-1/6

Planning parameters for digital broadcasting at frequencies below 30 MHz  
Note - Suppressed on 14/10/15 (CACE/757)

65/6

Spectrum requirements for sound broadcasting  
Note - Suppressed on 21/04/20 (CACE/947)

66/6

Audio coding schemes for sound broadcast programme inserts  
Note - Suppressed on 31/03/09 (CACE/476)

67/6

Methodologies for subjective assessment of audio and video quality  
Note - Suppressed on 16/04/10 (CACE/506)

68/6

Synchronization necessary for the satisfactory reception of sound and picture signals  
Note - Suppressed on 09/10/07 (CACE/434)

69-1/6

Conditions for a satisfactory television service in the presence of reflected signals  
Note - Suppressed on 04/12/2023 (CACE/1092)

70/6

Frequency sharing for the feeder links to a broadcasting satellite (sound and television)  
Note - Suppressed on 25/03/09 (CACE/475)

71/6

Sharing studies between high-definition television in the broadcasting-satellite service and other services  
Note - Suppressed on 25/03/09 (CACE/475)

72/6

Digital techniques in the broadcasting-satellite service (sound and television)  
Note - Suppressed on 25/03/09 (CACE/475)

73-1/6

Receiving Earth station antennas for the broadcasting-satellite service  
Note - Suppressed on 25/03/09 (CACE/475)

74/6

Radiation of unwanted emissions from space stations in the broadcasting-satellite service (sound and television)  
Note - Suppressed on 25/03/09 (CACE/475)

75/6

Telemetry, tracking and command signals and test signals for maintenance and testing of the radio-frequency characteristics of broadcasting-satellite  
Note - Suppressed on 25/03/09 (CACE/475)

76/6

Satellite broadcasting of high-definition television  
Note - Suppressed on 25/03/09 (CACE/475)

77-1/6

Methods and practices for digital recording of television programme material intended for international exchange  
Note - Suppressed on 16/04/10 (CACE/506)

78-1/6

Digital recording of high-definition television programmes for international exchange  
Note - Suppressed on 16/04/10 (CACE/506)

79/6

The harmonization of standards between broadcast and non-broadcast applications of television  
Note - Suppressed on 16/04/10 (CACE/506)

80/6

Coding for the broadcasting of digitally-encoded TV signals in terrestrial narrow-band channels  
Note - Suppressed on 01/01/18 (CACE/850)

81-1/6

Subjective assessments of the quality of television pictures including alphanumeric and graphic pictures  
Note - Suppressed on 16/04/10 (CACE/506)

82/6

Technical characteristics of feeder links to broadcasting satellites operating in the 12, 17 and 21 GHz bands  
Note - Suppressed on 17/12/10 (CACE/519)

83/6

Characteristics of systems in the broadcasting-satellite service (sound and television) for reception by transportable and fixed receivers  
Note - Suppressed on 25/03/09 (CACE/475)

84/6

Protection ratios for interference studies and system planning in the broadcasting-satellite service (sound and television)  
Note - Suppressed on 25/03/09 (CACE/475)

85/6

Simultaneous transmissions of TV programmes on BSS and FSS services from a multiservice space station  
Note - Suppressed on 25/03/09 (CACE/475)

86/6

Overall coordination of the technical characteristics and associated test methods for the separate parts of the television signal chain  
Note - Suppressed on 16/04/10 (CACE/506)

87/6

Acquisition and recovery times in digital television encoding  
Note - Suppressed on 31/03/09 (CACE/476)

88/6

Subjective assessment of stereoscopic television pictures  
Note - Suppressed on 14/10/15 (CACE/757)

89-1/6

User requirements for electronic news gathering  
Note - Suppressed on 14/10/15 (CACE/757)

90/6

Television recording format for long-term programme archives  
Note - Suppressed on 16/04/10 (CACE/506)

91/6

Recording of television programmes for international exchange  
Note - Suppressed on 09/10/07 (CACE/434)

92/6

Use of cinematographic film in television  
Note - Suppressed on 09/10/07 (CACE/434)

93/6

Frequency requirements for electronic news gathering  
Note - Suppressed on 14/10/15 (CACE/757)

94/6

Access to orbit and spectrum resources for the broadcasting satellite service and the fixed satellite service direct-to-home applications  
Note - Suppressed on 25/03/09 (CACE/475)

95/6

Use of computer technology in television broadcasting applications  
Note - Suppressed on 14/10/15 (CACE/757)

96-1/6

User requirements in the area of media asset management and transfer protocols for television programme production, recording and archiving  
Note - Suppressed on 14/10/15 (CACE/757)

97-2/6

Optimisation of quality of colour reproduction in television  
Note - Suppressed on 09/10/07 (CACE/434)

98-2/6

Adaptive image quality control in future TV systems  
Note - Suppressed on 09/10/07 (CACE/434)

99/6

Relationship between quality, quality evaluation methodology, and type of application, in a multimedia environment  
Note - Suppressed on 14/10/15 (CACE/757)

100/6

Television and multimedia images quality levels  
Note - Suppressed on 14/10/15 (CACE/757)

101/6

Broadcasting of copy protection signalling for television  
Note - Suppressed on 31/03/09 (CACE/476)

102-5/6

Methodologies for subjective assessment of audio and video quality  

103/6

Reference signals for the component digital studio  
Note - Suppressed on 31/03/09 (CACE/476)

104/6

Sharing criteria for BSS networks in the 17.3-17.8 GHz band in Region 2, and in the 21.4-22 GHz band in Regions 1 and 3, and their associated feeder links  
Note - Suppressed on 17/12/10 (CACE/519)

105/6

Spectrum requirements for television broadcasting  
Note - Suppressed on 21/04/20 (CACE/947)

106-1/6

Recording formats for different media to be used for the international exchange of recordings for high-definition television programme evaluation  
Note - Suppressed on 16/04/10 (CACE/506)

107/6

Harmonization of the definition of reference antenna patterns and range of the applicability for the broadcasting-satellite service  
Note - Suppressed on 10/03/06 (CACE/373)

108/6

Digital sound broadcasting in band 7 (HF) in the Tropical Zone  
Note - Suppressed on 14/10/15 (CACE/757)

109-1/6

In-service monitoring of perceived audiovisual quality for broadcasting and distribution networks  

110/6

Processability margins required for contribution programme material in television production  
Note - Suppressed on 16/04/10 (CACE/506)

111-2/6

Technical methods for the protection and utilization of the personal data of end users in broadcasting systems  

112-1/6

Guidelines on functionalities of facilities based on the use of digital servers in broadcast programme recording, archiving and playout  
Note - Suppressed on 14/10/15 (CACE/757)

113/6

Delivery of interactive information to and from large screen digital imagery venues through broadcasting systems  
Note - Suppressed on 14/10/15 (CACE/757)

114/6

Characteristics of television receivers and receiving antennas essential for frequency planning  
Note - Suppressed on 21/04/20 (CACE/947)

115/6

Registration methods for television and multimedia images  
Note - Suppressed on 16/04/10 (CACE/506)

116/6

Parameters and tolerance limits for the technical quality of audio signals intended for international exchange  
Note - Suppressed on 16/04/10 (CACE/506)

117/6

User requirements for Metadata related to digital recording and archiving of sound ad television programmes  
Note - Suppressed on 09/08/06 (CACE/399)

118-1/6

Broadcasting means for public warning, disaster mitigation and relief  

119/6

Use of lossless/perceptually lossless bit-rate reduction to transport HDTV signals over HD-SDI  
Note - Suppressed on 31/03/09 (CACE/476)

120-1/6

Digital sound broadcasting below 174 MHz  

121/6

Spectrum usage and user requirements for wireless microphones  
Note - Suppressed on 14/10/15 (CACE/757)

122/6

Objective perceptual audio quality measurement methods  
Note - Suppressed on 14/10/15 (CACE/757)

123/6

Approaches in programme production intended to improve the perceived image quality of broadcast digital SDTV and HDTV programmes  
Note - Suppressed on 14/10/15 (CACE/757)

124/6

Measurement methods for the verification and validation of digital television and sound broadcasting planning procedures  
Note - Suppressed on 21/04/20 (CACE/947)

125/6

Stereoscopic television  
Note - Suppressed on 17/10/12 (CACE/589)

126-1/6

Recommended operating practices to tailor television programme material to broadcasting applications at various image quality levels, display sizes and aspect ratios  

127/6

Mitigation techniques required for the use of digital modulation in the "26 MHz" broadcasting band for local coverage  
Note - Suppressed on 20/10/19 (CACE/936)

128-2/6

Digital 3DTV systems for broadcasting  
Note - Suppressed on 24/06/19 (CACE/908)

129/6

Impact of audio signal processing and compression techniques on terrestrial FM sound broadcasting emissions at VHF  

130-4/6

Digital interfaces for production, post-production and international exchange of sound and television programmes for broadcasting  

131-1/6

Common core data format for multimedia broadcasting  
Note - This Question replaces Question ITU-R 13/6

132-7/6

Digital terrestrial broadcasting planning  

133-2/6

Enhancements of digital terrestrial television broadcasting  

134/6

Recording of digital sound programme signals for international exchange  
Note - Suppressed on 20/10/19 (CACE/936)

135-2/6

System parameters for and management of digital sound systems with and without accompanying picture

 
Note - Suppressed on 28/01/25 (CACE/1132)

136-3/6

Worldwide broadcasting roaming  

137-1/6

Internet Protocol (IP) interfaces for programme production and exchange  
Note - Suppressed on 04/12/23 (CACE/1092)

138/6

Methods for signalling loudness compliance  
Note - Suppressed on 21/04/20 (CACE/947)

139-2/6

Methods for rendering of advanced audio formats  
Note - Suppressed on 28/01/25 (CACE/1132)

140-1/6

Global platform for the broadcasting service  

141/6

Internet delivery of sound and television broadcast originated soundtracks  
Note - Suppressed on 20/10/19 (CACE/936)

142-3/6

High dynamic range television for broadcasting  

143-2/6

Advanced immersive sensory media systems for programme production, exchange and presentation for broadcasting  

144/6

Use of Artificial Intelligence (AI) for broadcasting  

145/6

Systems for enabling access to broadcast and cooperative media for persons with disabilities
 

146/6

Spectrum requirements for terrestrial broadcasting  

147/6

Energy aware broadcasting systems  

148/6

Evolution of sound systems for broadcasting  

101-2/7

Performance and reliability of frequency standards and their use in time-scales  
Note - Suppressed on 19/10/07 (RA-07)

102-2/7

Terrestrial standard-frequency and time-signal dissemination  
Note - Suppressed on 19/10/07 (RA-07)

104-2/7

Stability of standard-frequency and time-signal emissions as received  
Note - Suppressed on 19/10/07 (RA-07)

110-2/7

Time codes  

111-1/7

Signal delays in antennas and other circuits and their calibration for high-accuracy time transfer  

118-2/7

Factors which affect frequency sharing between data relay satellite systems and systems of other services  

129-3/7

Unwanted emissions radiated from and received by stations of the science services  

139-4/7

Data transmission for Earth exploration-satellite systems  

141-4/7

Data transmission for meteorological-satellite systems  

145-3/7

Technical factors relating to the protection of radioastronomical observations
 

146-2/7

Criteria for evaluation of interference to radio astronomy  

149-1/7

Frequency utilization on the far side of the Moon  
Note - Suppressed on 05/08/15 (CACE/748)

152-2/7

Standard frequencies and time signals from satellites  
Note - Suppressed on 12/01/24 (CACE/1099)

201-2/7

Two-way time and frequency transfer through communication satellites  
Note - Suppressed on 19/10/07 (RA-07)

202-1/7

Protection criteria and frequency sharing between space very long baseline interferometry and other space research systems  
Note - Suppressed on 18/02/11 (CACE/527)

203-1/7

Characteristics and telecommunication requirements for space very long baseline interferometry  
Note - Suppressed on 18/02/11 (CACE/527)

205/7

Radio observations of pulsars  
Note - Suppressed on 19/10/07 (RA-07)

206-1/7

Frequency comparisons of remotely located standards at the 10-15 level of uncertainty  
Note - Suppressed on 19/10/07 (RA-07)

207-3/7

Time and frequency transfer using digital communication links  

211/7

Frequency sharing between the space research service and other services in the 37-38 GHz and 40-40.5 GHz bands  

213-1/7

Compatibility of spaceborne active sensors and systems in the services allocated above the band 5 250-5 460 MHz  
Note - Suppressed on 19/10/07 (RA-07)

215-1/7

Frequency sharing between Earth exploration-satellite systems (passive), space research systems (passive) and systems in the fixed, mobile and fixed-satellite services in the band 18.6-18.8 GHz  
Note - Suppressed on 19/10/07 (RA-07)

218-1/7

Frequency sharing between active sensor systems in the Earth exploration-satellite service and systems operating in other services at around 440 MHz and 5 300 MHz  
Note - Suppressed on 19/10/07 (RA-07)

219/7

Space operation and space research services frequency bands for telecommand links in the range 100 MHz to 1 GHz  
Note - Suppressed on 19/10/07 (RA-07)

221/7

Preferred frequency bands and protection criteria for space research service observations (passive)  

222-2/7

Radio links between earth stations and lunar and planetary missions by means of lunar and/or planetary data relay satellites  

223/7

The role of differential GPS networks in timing applications  
Note - Suppressed on 18/02/11 (CACE/527)

224/7

Algorithms for ensemble time scales and measurement systems  
Note - Suppressed on 19/10/07 (RA-07)

226-2/7

Frequency sharing between the radio astronomy service and other services in bands between 67 and 275 GHz
 

229/7

Frequency sharing between the Earth exploration-satellite service (passive) and airborne altimeters in the aeronautical radionavigation service in the band 4 200-4 400 MHz  
Note - Suppressed on 04/03/09 (CACE/473)

230-1/7

Preferred frequency bands and protection criteria for radio astronomy measurements in space  

231/7

Earth exploration-satellite service (active) and space research service (active) operating above 100 GHz  

232-1/7

Frequency sharing between spaceborne passive sensors and other services in the bands 10.60-10.68 GHz, 31.5-31.8 GHz and 36-37 GHz  
Note - Suppressed on 17/10/12 (CACE/590)

233/7

Sharing conditions between active sensor systems in the Earth exploration-satellite service and systems operating in other services around 35.5-36.0 GHz  
Note - Suppressed on 19/10/07 (RA-07)

234/7

Frequency sharing between active sensor systems in the Earth exploration-satellite service and systems operating in other services in the 1 215-1 300 MHz band  

235-1/7

Technical and operational characteristics of applications of science services operating above 275 GHz  
Note - Suppressed on 17/10/12 (CACE/590 )

236-3/7

The future of the UTC time scale  

237/7

Technical and operational factors relating to interference mitigation practices at radio astronomy stations  

238/7

Trusted time source for time stamp authority  
Note - Suppressed on 26/12/2023 (CACE/1099)

239/7

Instrumentation time codes  
Note - Suppressed on 26/12/2023 (CACE/1099)

240/7

Necessary criteria and calculation method for establishing coordination requirements relating to space research and Earth exploration-satellite applications in a space-to-space network composed of a space station on a geostationary satellite and a space station on a non-geostationary satellite in the bands 22.55-23.55 GHz and 25.25-27.5 GHz  
Note - Suppressed on 19/10/07 (RA-07)

241/7

Frequency bands and protection criteria for radio astronomy observations from space  
Note - Suppressed on 19/10/07 (RA-07)

242/7

Radio quiet zones  

243/7

Characterization of technical parameters and interference effects and possible interference mitigation techniques for passive sensors operating in the Earth exploration-satellite service (passive)  
Note - Suppressed on 20/01/12 (RA-12)

244/7

Interference between standard frequency and time signal services operating between 20 and 90 kHz  

245/7

Interference to the standard frequency and time signal service in the low-frequency band caused by noise from electrical sources  

246/7

Future bandwidth requirements for the space research service (deep space)  

247/7

Emergency radiocommunications for human space flight  

248/7

Timing Information from Global Navigation Satellite Systems (GNSS) and their augmentations  

249/7

Time and frequency information from "enhanced" LOng Range Aid to Navigation (eLORAN)  

250/7

Application and improvement of two-way satellite time and frequency transfer (TWSTFT)  

251/7

Ground-based passive sensors  

252/7

Parameters needed for the registration of distributed radio astronomy systems  
Note - Suppressed on 13/08/19 (CACE/918)

253/7

Relativistic effects in the transfer of time and frequency in the vicinity of the Earth and in the solar system  
Note - Suppressed on 26/12/2023 (CACE/1099)

254/7

Characteristics and spectrum requirements of satellite systems using nano and pico satellites  
Note - Suppressed on 05/07/17 (CACE/823)

255/7

Detection and resolution of radio frequency interference to Earth exploration-satellite service (passive) sensors
 

256-1/7

Space weather observations  

257/7

Technical and operational characteristics of radio astronomy applications operating above 275 GHz  

258/7

Geodetic VLBI  

259/7

Timing applications and the definition of the second  

260/7

Radio astronomy in the shielded zone of the Moon