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 https://www.iaru-r1.org/2021/23cm-band-in-the-spotlight-with-regulators/

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 https://www.iaru-r1.org/wp-content/uploads/2021/02/Report-from-WP4C_Feb-2021.docx

1240-1300 MHz ham radio band discussed by CEPT ECC SE40

CEPT LogoCEPT ECC has released its news summary for January 2020 that includes the SE40 Rome meeting on January 14-16 which discussed compatibility between RNSS and Amateur Services in 1240-1300 MHz.

The coexistence between the Radio Navigation Satellite Service (RNSS) and the Amateur Services in the frequency band 1240 – 1300 MHz was discussed by the CEPT ECC SE40 Working Group. The IARU presented possible scenarios to be taken into account in the sharing studies. The meeting agreed that further work on this WI will be developed in the SE40 Forum.

The papers, Amateur vs RNSS – Amateur scenarios – initial ideas, Draft Report RNSS vs Radioamateur, and Draft Minutes, along with other SE40 Rome meeting documents can be downloaded via
https://www.cept.org/ecc/groups/ecc/wg-se/se-40/client/meeting-documents/?flid=27486

The CEPT ECC January news summary is at
https://cept.org/ecc/news/ecc-monthly-news-summary-for-january-2020/
https://twitter.com/CEPT_ECC

The Galileo GNSS constellation and 1296 EME operation
http://www.southgatearc.org/news/2020/february/the-galileo-gnss-constellation-and-1296-eme-operation.htm

2006 article Potential Interference To Galileo From 23cm Band Operations by Peter Blair G3LTF
http://www.southgatearc.org/articles/galileo.htm

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
https://cept.org/ecc/groups/ecc/cpg/client/meeting-documents/?flid=10031

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

Some background information is at
https://amsat-uk.org/2019/05/31/1240-1300-mhz-band-discussed-by-cept-wgfm-and-cpg-pta/

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
http://www.southgatearc.org/articles/galileo.htm