144 and 1240 MHz Bands – RSGB information

RSGB volunteers continue to be engaged with IARU and Ofcom on WRC matters including the 144 MHz and 1240 MHz bands as well as WRC-19 Agenda Items in CEPT-PTD (50 MHz, WPT, 5GHz) and CEPT-PT1 (24/47 GHz).

At UK level, RSGB are members of the Ofcom IFPG groups that consider these matters.

The RSGB has updated their special focus page with the latest documents and CEPT meeting minutes. See Proposed WRC-23 Agenda Items at
https://rsgb.org/main/news/special-focus/wrc-19/wrc-19-papers/

June 21 – RSGB Update on 144MHz and 1240 MHz band threats
https://rsgb.org/main/blog/news/gb2rs/headlines/2019/06/21/update-on-144mhz-and-23cm-threats/

—-

CEPT Project Team A, responsible for some aspects of the CEPT position for WRC-19, met in Prague from June 17-21. The meeting minutes are available for download

Regarding the 1240-1300 MHz band the minutes say:

The representative of the European Commission (EC) stated that, RNSS systems are global by nature, and that the radio amateur service is allocated in all regions. Once RNSS receivers (including Galileo E6 receivers) are deployed ubiquitously, the number of interference cases coming from radio amateur emissions will increase significantly and represent an important burden to Administrations, unless clear guidelines are available in order to drive the amateur community towards an appropriate usage of their allocation.

For these reasons, the EC believes that the French proposal of a WRC-23 agenda item is essential in order to complement the work being started within CEPT, and to find a sustainable solution for all parties. Also, the EC considers that WRC-23 is the right time for a decision enabling the better regulation of the RNSS-amateur coexistence at international level, as Galileo will start providing freely available high accuracy services in the 1260-1300 MHz band on a global basis from 2020.

The EC noted that some of the 7 Administrations which objected to the French contribution are open to consider a revised version of the proposal, and therefore believes that relevant support may be achievable at CPG level, following further discussions until end August.

Regarding the 144 MHz band the minutes say:

The representative of the IARU stated that, the IARU views with grave concern the element of the WRC-23 agenda item proposal 1.6 in the AI10 ECP, on studies towards a possible new allocation to the aeronautical mobile service in the band 144-146 MHz. This band is an important and the only globally harmonised primary allocation to the amateur and amateur satellite services in the VHF range. Examination of the RR below and above the 144-146 MHz range suggests that alternative proposals could be developed that could provide further spectrum for the aeronautical applications without impacting on this amateur service spectrum. The proposal provides no justification for addressing this band and the IARU believes that sharing with airborne systems is likely to be difficult and will lead to constraints on the development of the amateur and amateur satellite services in this band.

Meeting minutes https://cept.org/Documents/cpg-pt-a/52280/pta-19-105_minutes-pta-7

See the WRC-23 Agenda Items update issued by IARU Region 1 June 21
https://amsat-uk.org/2019/06/21/144-and-1240-mhz-bands-wrc-23-agenda-items-update/

Some background on previous CEPT WGFM and CPG/PTA discussions on the 1240-1300 MHz band
https://amsat-uk.org/2019/05/31/1240-1300-mhz-band-discussed-by-cept-wgfm-and-cpg-pta/

144 and 1240 MHz bands – WRC-23 Agenda Items – Update

IARU was represented at the meeting of CEPT Project Team A (responsible for some aspects of the CEPT position for WRC-19), held in Prague from June 17-21.

The IARU Region 1 website reports:

Of particular interest were discussions on two proposed Agenda items for WRC-23, concerning the sharing of the 1240-1300 MHz band with the Galileo navigation system and the proposal from France to study a range of frequencies, including the 144 MHz amateur band, for future aeronautical applications.

The output from PTA does not carry forward the Galileo proposal, but it is likely that further discussions will take place prior to the Conference Preparatory Group meeting in August. Meantime work on this issue will also continue in other specialist CEPT forums. IARU will continue to support this approach and it believes this will be the most efficient method for developing the sharing guidance required to protect Galileo operations in a timely manner.

Regarding new aeronautical frequencies (including 144-146 MHz), the proposal was not strongly opposed by administrations and has been carried forward to the higher level CEPT Conference Preparatory Group (CPG) meeting in August for final adoption.

IARU views with grave concern any proposal to include the 144 MHz band in the proposed aeronautical agenda item and will be making every effort to fully protect amateur radio interests and seek the support of regulators in this regard.

The band 144-146 MHz is allocated globally to the amateur and amateur satellite services on a primary basis. It is the only globally harmonised VHF band for the amateur and amateur satellite service. As such it is an important and widely used part of the amateur spectrum with a vast installed base of both terrestrial/maritime amateur users and systems and operational satellite stations including the International Space Station (ISS).

This heavily used band supports a large number of repeater stations, segments for weak-signal long distance terrestrial and EME (Earth-Moon-Earth) communications, satellite and ISS usage, data services, as well as conventional terrestrial and tropospheric communications. The Primary status of the band has also enabled a number of amateur aeronautical uses including on manned flights and high-altitude balloons. Supporting all of this is a wide variety of commercial and experimental equipment, ranging from ultra-low noise preamplifiers for sensitive receivers, software defined radios and transmitting systems that can deliver high EIRP levels when needed to overcome high loss propagation paths.

Given the propagation to/from an aircraft at altitude, it is entirely possible that harmful interference to sensitive amateur and amateur satellite receivers will be caused over a 1,000 km radius of a single aircraft.

IARU will shortly be providing a brief to Member Societies and other interested parties, asking them to discuss the French proposal with their administrations well in advance of the August CEPT-CPG meeting.

It is possible that France will seek to introduce into other Regional Telecommunications Organisations (RTO) the same proposal to study the 144-146 MHz band for aeronautical use. IARU will provide a brief shortly to enable representations to be made to administrations in countries under those RTOs for protection of this amateur spectrum allocation.

Source: IARU Region 1 http://iaru-r1.org/

The UK Microwave Group Tweeted:
“We hear only one admin (Germany) opposed the 144MHz proposal – no one else.”
https://twitter.com/UKGHZ/status/1142180732493803522

Download the documents from the CEPT CPG Project Team A meeting in Prague June 17-21 from
https://cept.org/ecc/groups/ecc/cpg/cpg-pt-a/client/meeting-documents/?flid=5624

Meeting Minutes https://cept.org/Documents/cpg-pt-a/52280/pta-19-105_minutes-pta-7

France proposes 144-146 MHz for Aeronautical Mobile Service
http://www.southgatearc.org/news/2019/june/france-proposes-144-146-mhz-for-aeronautical-mobile-service.htm

1240-1300 MHz band discussed by CEPT WGFM and CPG/PTA
https://amsat-uk.org/2019/05/31/1240-1300-mhz-band-discussed-by-cept-wgfm-and-cpg-pta/

1240-1300 MHz IARU Region 1 paper PTA(19)069 – RNSS Proposal WRC-19 AI 10
http://rsgb.org/main/files/2019/06/PTA19069_IARU_AI-10_Amateur-GNSS_Final.pdf

Could a new licence class help counter threats at VHF and above?
http://www.southgatearc.org/news/2019/june/could-a-new-licence-counter-threats-at-vhf-and-above.htm

WRC-23 Agenda Items may impact 144 MHz and 1240 MHz bands

IARU Region 1 notes that there are two proposals under discussion in Europe as possible future Agenda Items at WRC 2023, which potentially could impact important amateur radio frequencies.

IARU Region 1 has posted:

The following sets out the current IARU position on these proposals.

A proposal from France to consider the band 144-146 MHz as a primary allocation to the Aeronautical Mobile service, as part of a broader consideration of the spectrum allocated to that service.

The band 144-146 MHz is allocated globally to the amateur and amateur satellite services on a primary basis. This is one of the few primary allocations to the amateur service above 29.7 MHz and as such is an important and widely used part of the amateur spectrum with a vast installed base of users and operational satellite stations.

IARU views with grave concern any proposal to include this band in the proposed study. It will be representing this view energetically in Regional Telecommunications Organisations and in ITU to seek to obtain assurances that the spectrum will remain a primary allocation for the amateur services.

A proposal to study the amateur allocation in the 1240-1300 MHz (“23cm”) band following reported cases of interference to the Galileo navigation system.

IARU is aware of a handful of cases where interference to the Galileo E6 signal has been reported. In all cases these have been resolved by local action with the full cooperation of the amateur stations concerned.

IARU does not want the amateur service to affect the operation of the Galileo system in any way. Joint studies have been carried out to assess the true vulnerability of the system and, based on these, IARU regards the proposal to initiate an Agenda item for WRC-23 as premature.

The IARU position is that proper technical assessment of the issues involved should be made in the relevant CEPT study group. Proper account needs to be taken of the operational characteristics of the amateur service in order to develop sensible and proportionate measures that will facilitate the continued utility of the band for amateur experimentation whilst respecting the primary status of the GNSS service.

IARU is ready to cooperate fully in any studies and shares the objective of reaching a secure and permanent solution to the issues of sharing in this band.

IARU asks its Member Societies to draw this information to the attention of their members, and to refrain at this time from making speculative public comments about the situation until further progress has been made in regulatory discussions. IARU is also ready to discuss this issue with other societies not in IARU membership.

Source IARU Region 1
https://www.iaru-r1.org/index.php/88-news/1864-wrc-23-agenda-items

1240-1300 MHz band discussed by CEPT WGFM and CPG/PTA
https://amsat-uk.org/2019/05/31/1240-1300-mhz-band-discussed-by-cept-wgfm-and-cpg-pta/

1240-1300 MHz band discussed by CEPT WGFM and CPG/PTA

WRC-2000 saw the Galileo Global Navigation Satellite System (GNSS) get an allocation at 1260-1300 MHz. This was the same ITU conference that saw 432-438 MHz being allocated for satellites that carry Synthetic-Aperture Radar (SAR) systems.

In January 2006 Peter Blair G3LTF published a paper Potential Interference To Galileo From 23cm Band Operations. This described the proposed Galileo system design and its applications with particular reference to the E6 (1260-1300 MHz) band. It described the operation of typical Galileo receivers and their ability to deal with interference and gave practical illustrations of these effects.

The 30-satellite Galileo system (24 operational and 6 active spares) is expected to be completed by 2020.

A paper at the CEPT WGFM meeting #93 held in Rome, February 4-8, 2019, titled Coexistence between AS [Amateur Services] and RNSS in the Frequency Range 1260-1300 MHz said:

At the most recent meeting of CPG/PTA #5 in September 2018 the European Commission provided a proposal for Agenda Item 10 of WRC-19 on the amateur service allocation in L band. The EC contribution (CPG/PTA(18)080) proposed to consider an extension of the spectrum allocation to the amateur service on a secondary basis in the range 1300 – 1350 MHz. Germany announced at that meeting that a measurement campaign was already planned to investigate further the coexistence of applications in the amateur service and the radionavigation-satellite service [RNSS] particularly in the frequency range 1260 – 1300 MHz.

Since then these measurements were carried out at the premises of the “Universität der Bundeswehr München” (University of Federal Armed Forces Munich) mid December 2018 and a report on the issue is in preparation. At CPG/PTA #5 the meeting agreed to wait for the results of the measurement before taking any further action. Currently the measurement data is being processed and the results will be reported to CPG/PTA #6 in April 2019. Germany would offer to present this report also to WG FM.

Depending on the results the issue could become an enforcement issue for CEPT and, hence, may become a topic for further consideration in WG FM and WG SE.

WGFM Meeting #93 Paper: Coexistence between Amateur Services and RNSS (Galileo) in the Frequency Range 1260-1300 MHz
https://cept.org/Documents/wg-fm/49268/fm-19-069_information-on-measurement-campaign-on-as-gnss-in-1260-1300-mhz-germany

The CPG/PTA meeting #6 held in Bucharest April 1-5, 2019, saw this proposal:

PTA is asked to consider the results of these tests to determine if appropriate actions are required.

A possible action could be to propose a new Agenda Item for WRC-23 to address the issue. The subject could be: to consider the possible additional spectrum allocation to the amateur service on a secondary basis above 1300 MHz (or in another frequency band to be determined), with a view to progressively migrate the radio amateurs services from the band 1240-1300 MHz to the new band. To study an ITU recommendation for the coexistence of services in the band 1240-1300 MHz in the short/medium term.

CPG/PTA meeting #6 paper: PTA(19)061 EC-JRC_Compatibility between amateur and Galileo
https://cept.org/ecc/groups/ecc/cpg/cpg-pt-a/client/meeting-documents/?flid=9504

WRC-19 Conference Preparatory Group meeting documents
https://cept.org/ecc/groups/ecc/cpg/client/meeting-documents/

2015 European Commission Joint Research Centre report Compatibility between Amateur Radio Services and Galileo in the 1260-1300 MHz Radio Frequency Band – download PDF here

January 2006 – Potential Interference To Galileo From 23cm Band Operations
http://www.southgatearc.org/articles/galileo.htm

CEPT considers use of 5830-5850 MHz satellite band

CEPT LogoThe CEPT SE24 Short Range Devices meeting M72 took place in Vienna on August 26-27, 2013.

The meeting discussed the use of the frequency bands 5350-5470 MHz and 5725-5925 MHz (‘WAS/RLAN extension bands’) for wireless access systems including radio local area networks (WAS/RLANs).

Any use of Amateur Satellite Service downlink band of 5830-5850 MHz for this purpose would inevitably raise the noise floor making the weak satellite signals even harder to receive.

Read the CEPT working document at M72_Info2_SE24_att_RSCOM13-32rev3_Draft Mandate CEPT 5 GHz RLAN

CEPT SE24 meeting documents can be downloaded from
http://www.cept.org/ecc/groups/ecc/wg-se/se-24/client/meeting-documents