WRC 2007 Agenda Items for WP 7D

Radio astronomy

The list below shows all the WRC 2007 Agenda Items for which this group is involved. Click on an Agenda Item or Resolution to get more information about which Visualyse product could be useful, and how Transfinite consultants can assist in studying this problem.

Agenda Item	Description
Agenda 1.4	This wide ranging Agenda Item relates to the further development of IMT-2000 and systems beyond IMT-2000, in particular: i) studies of the requirements for spectrum and potential frequency ranges ii) consideration of spectrum at frequencies below those identified in 5.317A (806 - 960 MHz) iii) that the studies in i) above should take account of benefit to developing countries of the satellite component of IMT-2000; iv) that sharing and compatibility studies should be performed where necessary when considering additional frequency bands for IMT-2000
Agenda 1.5	This agenda item covers consideration of mobile allocations to be used for wideband aeronautical telemetry and associated telecomand, based upon: i) study of the spectrum requirements for such systems; ii) study of possible upgrading of suitable secondary mobile allocations in the range 3 - 16 GHz to primary, undertaking sharing studies where required; iii) consideration of additional allocations in the range 3 - 16 GHz to the mobile service for such services, undertaking sharing studies where required;
Agenda 1.6	This agenda item relates to aeronautical mobile (R) services in bands between 108 MHz and 6 GHz. It notes there are new requirements to support air navigation, and so the following work is required: i) to identify if existing allocations to aeronautical services are sufficient for these new applications; ii) if additional spectrum is required, to identify what might be suitable bands, taking into account the need to not constrain existing and planned use of such bands, and so undertaking sharing studies where required; iii) in particular, how to accommodate the requirements for aeronautical systems in the band 5 091 - 5 150 MHz iv) to consider what actions would be required to broaden current satellite frequency allocations to support the expansion of the ICAO CNS/ATM system
Agenda 1.8	This agenda item relates to continuing the development of the regulatory framework for High Altitude Platform Stations (HAPS). Firstly in the bands 47.2 - 47.5 and 47.9 - 48.2 GHz: i) to encourage administrations to facilitate coordination between HAPS systems and co-primary satellite services, provisionally using Article 9 as a basis for procedures; ii) to study power limits for HAPS ground stations to facilitate sharing with space station receivers; iii) to study the regulatory provisions that might be needed to address the issue of a HAPS deployment in one administration effecting another; iv) other issues relating to sharing with radio astronomy and GSO FSS; Secondly in the bands 27.5 - 28.35 (HAPS to ground) and 31 - 31.3 (ground to HAPS) GHz, where HAPS shall not cause harmful interference to, nor claim protection from stations of other services: v) to conduct studies including sharing with fixed service to identify a suitable and preferably common 300 MHz of the 27.5 - 28.35 GHz; vi) to develop the necessary Recommendations on technical sharing criteria or HAPS system design conditions that are necessary to ensure HAPs can operate successfully on a non-harmful interference, non protected basis; vii) studies of the interference criteria and methodology for evaluating interference between HAPS downlinks and GSO FSS Uplinks; viii) to study the regulatory provisions that might be needed to address the issue of a HAPS deployment in one adminstration effecting another; ix) studies relating to mitigation techniques for HAPS sharing with the fixed service;
Agenda 1.11	This agenda item relates to proposals to provide broadcast satellite services in the band 620 - 790 MHz, from GSO or non-GSO stations. This band is extensively used by terrestrial applications, in particular terrestrial television broadcasting, and it is therefore necessary to undertake studies of sharing including the sharing criteria, together with regulatory provisions. It should be noted that article 22.2 applies in this band, and so study will be required to ensure that non-GSO BSS systems do not cause unacceptable interference into GSO systems. These bands also have allocations to the fixed and mobile services in some regions, which results in additional scenarios that require study.
Agenda 1.13	This agenda item covers issues relating to all services in HF bands between 4 MHz and 10 MHz, excluding those in the band 7 000 - 7 200 kHz and those covered by Appendices 25, 26, and 27. Technological change has made bands allocated for A1A Morse telegraphy and narrow band direct printing under utilised, while there is a demand for new digital technology and more spectrum for broadcast applications. Studies are therefore required to: i) continue to study under Resolution 729 the use of frequency adaptive systems in the MF and HF bands; ii) identify the characteristics of digital system(s) to be used in the MF/HF bands by the maritime mobile service, taking into account MMS requirements and impact on Appendix 17; iii) study the potential to allocate further bands to the broadcast service, taking into account other services using these bands
Agenda 1.17	This agenda item relates to the 1 390 - 1 392 MHz (E-s) and 1 430 - 1 432 MHz (s-E) additional allocations made during WRC 2003 to the fixed satellite service operating feeder links for non-GSO MSS systems where the service links are under 1 GHz. However the CPM Report indicated that studies of compatibility with other services allocated in this band were not complete, indeed there were suggestion that sharing with EESS (passive) in particular, could be problematic. Services in these bands includes the fixed, mobile, radiolocation, EESS (passive), radio astronomy, space research (passive) and aeronautical mobile. These allocations are therefore not be used until studies are completed on: i) sharing studies on operational and technical means to facilitate sharing in the uplink direction in the band identified and others around 1.4 GHz; ii) sharing studies on operational and technical means to facilitate sharing in the downlink direction in the band identified and others around 1.4 GHz; iii) validate that the unwanted emissions from the FSS feeder links would meet the protection requirements of the passive services iv) to study the PFD levels required to protect the EESS (passive)
Agenda 1.19	This agenda item relates to spectrum for broadband services via satellite. A number of bands have been identified in 5.BC03 for use by high density fixed satellite service (HDFSS) applications, and it would be beneficial if there were globally harmonised spectrum. Work is therefore required to: i) identify the requirement for spectrum for these types of systems; ii) identify the preferred global harmonised bands, potentially including sharing studies with other services allocated in these bands
Agenda 1.21	This agenda item refers to compatibility between the radio astronomy service and active space services (such as FSS, BSS, MSS and RNSS) in frequency bands from 150.05 MHz to 22.5 GHz. Resolution 739 [COM 4/15] refers to procedures that could be used during the design of an active space service system or after lauch by which the RAS can enter into consultations with satellite operators to facilitate a mutually acceptable solution to any problem identified. It also notes that studies for some active space services at some bands are incomplete, and therefore that this work should be undertaken to update the table of thresholds in Table 1-1 of Resolution 739 [COM 4/15]. In addition Resolution 740 [COM 4/17] identifies an additional series of bands and services for which further study is required, which could result in updates to existing Recommendations (e.g. SM 1633) or development of new Recommendations, and/or an update to Table 1-1 of Resolution 739 [COM 4/15].
Resolution 63	This resolution relates to interference from industrial, scientific, and medical (ISM) equipment, and calls for further studies on the limits to be imposed on ISM equipment within and outside the bands designated for its use.
Resolution 525	This resolution relates to the introduction of broadcast satellite service (sound) systems and complementary terrestrial broadcasting in bands between 1 and 3 GHz. It calls upon studies of the calculation method and interference criteria for sharing between satellite and terrestrial broadcasting stations, and with other effected services.
Resolution 743 [COM5/7]	This resolution relates to the band 42.5 - 43.5 GHz, where power flux density (PFD) limits were introduced to protect the radio astronomy service from emissions from GSO FSS and BSS systems. In article 5.BC05 these are defined as absolute (100% of time) levels, but in this resolution it states that in Region 2 they can be exceeded for not more than 2% of time. However it also calls for studies and development of Recommendations to establish the appropriate balance between this percentage of time and the associated impact on radio astronomy observations.
Resolution 950 [COM7/1]	This resolution relates to bands from 275 to 3,000 GHz, which is currently not covered by the table of allocations. Article 5.565 makes provision for use of these bands by passive services such as radio astronomy, EESS (passive) and space research (passive). There is therefore a need to study potential usage of these bands and possible sharing issues.
Resolution 952 [COM7/3]	This resolution relates to the issue of Ultra Wide-band (UWB) systems, that have a very large bandwidth and so could operate across many frequency bands, potentially impacting a large number of receivers. These systems are not considered as Industrial, Scientific, and Medical (SIM) applications. There is therefore a need to continue studies about the issues raised by these systems, including sharing studies and regulatory procedures.
Resolution 79	Study the technical basis of coordination between RA stations operating in the 42.5 - 43.5 GHz band with HD-FS stations