Recent activity on the 23cm band RNSS Coexistence Studies

CEPT LogoThe Chair of IARU Region 1 Spectrum Affairs, Barry Lewis G4SJH, reports on the work being done in defending the interests of the Amateur Services in the 1240-1300 MHz band.

His IARU Region 1 post reads:

IARU is continuing to represent the amateur services interests in the 23cm band Galileo/GLONASS radio navigation satellite service coexistence discussions in the CEPT project teams.

The most recent CEPT SE40 project team meeting was held from 24th to 26th March 2021 and the IARU R1 was represented by Barry Lewis, G4SJH (Region 1 SRLC chair). At that meeting the first coexistence calculations were introduced by one CEPT administration, based on some initial assumptions about the amateur service operation. The IARU is continuing to work with the regulators to refine the details of these assumptions and make them and the calculations more representative of typical amateur station characteristics and band usage. These first calculations are considered only as a starting point and the meeting agreed that further work is needed to develop the calculations into a more comprehensive study.

Measurement campaigns have shown that the potential for coexistence depends very much on the frequency of the amateur service transmissions in the 23cm band with respect to the RNSS receiver bandwidth. This aspect needs to be considered more carefully once the initial scenarios and calculations are agreed.

In addition the IARU continues to have questions about the protection criteria required by the RNSS receivers and in particular how they relate to RNSS operational and service provision behaviour. IARU has ensured alignment of the amateur and amateur service information being used in CEPT with that being used in the parallel work in the ITU‑R relating to WRC-23 AI 9.1b.

Source IARU Region 1

The meeting Input paper “Amateur versus RNSS, interference areas” that was submitted by France as well as other meeting documents can be downloaded from

23cm band in the spotlight with regulators

RNSS - Credit IARU Region 1

RNSS – Credit IARU Region 1

The Chair of IARU Region 1 Spectrum Affairs, Barry Lewis G4SJH, reports on the meeting of the ITU‑R Working Party 4C (WP4C) on February 15-19 which discussed the amateur radio allocation at 1240-1300 MHz.

On the IARU Region 1 site he writes:

During the week February 15–19, the preparatory work for WRC-23 agenda item 9.1b continued in ITU‑R Working Party 4C (WP4C). The WRC agenda item has initiated technical studies on coexistence between the radio navigation satellite service (RNSS) and the amateur services in the 23cm band. As usual, the IARU participated in the meeting and delivered key information on amateur activities in this important microwave band. This information is vital to ensure the amateur services are realistically represented in the studies as they move forward.

It remains vital that national amateur communities present their views on the importance of this band to their national regulators in a consolidated and consistent manner.

To assist with this the IARU-R1 is developing supporting material that member societies can refer to when addressing the topic with their national regulator.

The work on this topic will continue throughout the year and beyond both in ITU‑R and in the regional telecommunications organisations and the IARU is committed to ensure every organisation understands the amateur position on this important microwave band.

Source IARU-R1

The ITU‑R WP4C Summary Meeting Report notes “The only administration that can be considered supportive towards proper treatment of the Amateur Services in this work is Germany”, read the report at

1240-1300 MHz discussed at CEPT SE 40 meeting

CEPT LogoThe 69th meeting of CEPT ECC Working Group SE-40, held June 23-25, discussed the amateur radio 1240-1300 MHz band, the meeting documents are now available.

Several contributions were received for the ECC Report dealing with the coexistence between the radionavigation-satellite service and the amateur service in the frequency band 1240 – 1300 MHz. The contributions were incorporated in the draft ECC Report. The CPG arrangements for the preparation of WRC-23 for AI 9.1 topic b) was noted.

The Russian Federation noted:
1240-1260 MHz is by the GLONASS system
1260-1300 MHz are used by EU’s Galileo, Beijing’s Beidou, Japan’s QZSS and is planned to be used by Korea’s KPS.

Among the documents available in Input, Info and Minutes are:
• SE40(20)052 Amateur Repeaters – IARU-R1
• SE40(20)051 Section 2 update WI_39 – IARU-R1
• SE40(20)050 Annex Draft report RNSS Amateur – Russian Federation
• SE40(20)049 Suggestions for RNSS and Amateur Service Compatibility – Russian Federation
• Info 1 Amateur repeaters 23 cm – IARU-R1
• Info 3 Letter to SE40 chairman on updated of ITU-R M.1092 – European Commission
• Minutes
• SE40(20)56A3 (1) Draft Report Amateur vs RNSS

Download the meeting documents from

Threat to Amateur Radio 23cm band

Galileo LogoA joint paper by France, Lithuania, Malta, Slovenia and The Netherlands for the CEPT CPG meeting in Ankara, August 26-30, attacks the continued use by Radio Amateurs of our 1240-1300 MHz band.

This is the final CEPT CPG meeting in preparation for the ITU World Radiocommunication Conference 2019 (WRC-19) to be held in Sharm el-Sheikh, Egypt, October 28 to November 22. This conference will define the Agenda Items for WRC-23.

Paper AI10 – Proposal on AS-RNSS says:

Galileo is close to full operational capability and its E6 signals in the band 1260-1300 MHz will support new services such as the free-to-use Galileo High Accuracy Service, and also robust authentication, expected to be used by a variety of applications including autonomous vehicles and the Internet of Things (IoT).

Several cases of interference to Galileo E6 receivers from amateur service emissions have occurred in the recent past, sometimes at significant distance, and have taken several hours or even days to be eliminated. There is therefore a serious concern that as Galileo E6 receivers are deployed and used more widely, cases of interference from amateur stations will rapidly grow in number.

A WRC-23 agenda item is necessary to address this issue because:

1. Unregulated use of the band 1240-1300 MHz by the amateur service is a serious source of harmful interference to RNSS receivers. This is demonstrated by experience.

2. The number of Galileo receivers in 1260-1300 MHz will increase dramatically, and interference cases will multiply if not addressed timely.

3. Galileo and other RNSS systems will deploy at global scale, and interference scenario between amateur emissions and RNSS receivers include cross-border cases. The issue is therefore of international nature and is to be addressed in the ITU framework.

4. Galileo is a major European asset, and a decision at WRC-23 is essential to be compatible with the roadmap of deployment of Galileo receivers in this band.

Download Paper: AI10 – Proposal on AS-RNSS from

Also see the IARU paper: RNSS Proposal WRC-19 AI 10 at the same URL

Some background information is at

European Commission Joint Research Centre report written 2014 and published 2015 on Compatibility between Amateur Radio Services and Galileo in the 1260-1300 MHz Radio Frequency Band. It reports the effect of transmissions of 0.1, 1 and 15 watts EIRP on a Galileo receiver up to 10 km away – download PDF here

January 2006 – Potential Interference To Galileo From 23cm Band Operations by Peter Blair G3LTF

SSA defends 23cm band against Galileo threat

Galileo LogoSweden’s national amateur radio society, the SSA, has sent a supplementary letter to the communications regulator PTS ahead of the next meeting of the CEPT ECC Conference Preparatory Group CPG-19.

The SSA report:

At a previous CEPT meeting (PTA), France has proposed an agenda item to WRC-23 that the coexistence between satellite navigation (eg Galileo) and amateur radio in the band 1240-1300 MHz should be investigated. The proposal was voted down at the preparatory PTA meeting, but France has now sent letters to the various telecommunications authorities with a request that they now support this proposal at the forthcoming CPG19-9. SSA opposes this.

SSA has therefore sent a supplementary letter to PTS about our 23 cm amateur band. Our section leader for IARU and VUSHF Mats SM6EAN explains the background and our opinion on our section pages. Here you can also read the new letter to PTS.

Hans-Christian SM6ZEM

Link to letter in Google English is available via

The next meeting of the CEPT ECC Conference Preparatory Group CPG-19 takes place in Ankara, Turkey on August 26-30, 2019. The meeting documents should be available in advance at

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

January 2006 – Potential Interference To Galileo From 23cm Band Operations by Peter Blair G3LTF

Dramatic power reduction on 23cm for Belgium radio hams

A Galileo satellite - image credit ESA

A Galileo satellite – image credit ESA

The Belgium regulator BIPT has proposed cutting to just 20 watts the permitted power level for the Amateur and Amateur-Satellite allocations in 1260-1300 MHz which is to be used by the Galileo GNSS / GPS constellation.

A Google translation of the UBA post reads:

On December 18, the BIPT website provides BIPT consultation on the Frequencies, Power and Transmission modes that may be used by radio amateurs.

This consultation was already announced at the BIPT meeting with the recognized associations of September 28 and should provide a framework for the introduction of the CEPT Novice license in Belgium.

The most important part is the Appendix 1 which establishes the Frequency bands and technical characteristics allowed for the different categories of radio amateur licenses.

For holders of a HAREC license (class A operating certificate), there are only changes to the transmission power (usually in our favor):

• On most bands between 1.81 MHz and 440 MHz, the permitted power is 1500 W. Exceptions are 1.85-2.00 MHz (10 W), 5.3515-5.3665 MHz (15 W EIRP), 50-52 MHz (200 W), 69.95 MHz (10 W). EIRP), 70.1125-70.4125 MHz (50W) and 433.05-434.79 MHz (200W EIRP for (D-) ATV, 200W transmit power for other modes). On the bands above 1 GHz the permissible power is increased to 200 W, with the exception of 1260-1300 MHz (20 W). The special license for higher capital expires, but to perform exceptional experiments one can still submit a motivated request to temporarily use a larger capital. It is allowed to own devices that are capable of supplying a power up to twice the permitted maximum power.

The holders of the newly introduced CEPT Novice license (class B operating license) have access to almost all bands between 1.81 MHz and 440 MHz (except 5.3515-5.3665 MHz, 69.95 MHz and 70.1125-70.4125 MHz). The permitted transmission power is 100W at HF ​​and 6 meters and 50 W at 2 m and 70 cm. All classes of broadcast (modes) are allowed with the exception of D-ATV.
For the holders of a basic license (class C operating license) the changes are greater:

• The permissible transmission power is limited to 10 W, but the use of devices up to 100 W transmission power remains permitted (provided that the power is limited to 10 W). The use of external power amplifiers is not permitted.
• The use of the 17 m band (now 18.080-18.168 MHz), 12 m band (now 24.900-24.990 MHz) and 6 m band (now 50.125-52.000 MHz) is no longer allowed.
• The 20 m band is expanded (14,000-14,150 and 14,250-14,350 MHz), this is 65 kHz extra (14,080-140150 MHz).
• The 15 m band is expanded (21,000-21,150 and 21,320-21,450 MHz), this is 90 kHz extra (21,000-21,040 and 21,100-21,150 MHz).
• The 10 m band is expanded (28,000-29,700 MHz), this is 40 kHz extra (28,000-28,040 MHz).
• The permitted classes of broadcast (modes) do not change, everything modes except (D-) ATV remain allowed.

The full text of this consultation can be found on

Everyone has the right to respond to the content of this consultation until January 18 and to propose changes.

The UBA will certainly do this and invites all members to send their comments and proposals for January 5 to ON7YD ( ( on7yd [at] uba [dot] be ) ). Anyone who wants to respond in their own name can find the procedure for this at

UBA in Google English

2006 article Potential Interference To Galileo From 23cm Band Operations by Peter Blair G3LTF.
The Galileo constellation is expected to be fully operational by 2020.