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