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AO-73/FUNcube-1 Fitter Message for The Queen’s 70th Jubilee Celebration

In June 2022, Her Majesty The Queen becomes the first British Monarch to celebrate a Platinum Jubilee after 70 years of service.

AMSAT-UK has decided to send a special Platinum Jubilee greetings message via FUNcube-1 (AO-73). Anyone who receives this message and uploads it to the Data Warehouse using the Dashboard can generate a certificate to remember this historic event.

AO-73/FUNcube-1 is transmitting the Jubilee Fitter message on the BPSK Telemetry beacon which has a nominal frequency of 145.935 MHz +/ Doppler.

The AO-73/FUNcube-1 Dashboard App can be downloaded from
https://funcube.org.uk/working-documents/funcube-telemetry-dashboard/

Data Warehouse http://data.amsat-uk.org/missions

Online tracking of AO-73 https://www.n2yo.com/satellite/?s=39444

Get The Details…

m5aka

AMSAT-UK

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23cm band and Sat-Nav Coexistence: ITU‑R WP4C Studies

The 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.

On the IARU Region 1 site he writes:

During the period May 4-10, 2022, the IARU continued to engage in the preparatory work for WRC-23 agenda item 9.1b in ITU‑R Working Party 4C (WP4C).

Work continued to develop the coexistence studies between the amateur services in the 23cm band and the radio-navigation satellite services (RNSS) operating across the band. New studies were submitted by France, China and the Russian Federation.

The scale of the problem for the amateur services is becoming clear. For example, the studies predict that even a 10W 23cm band station could cause interference to RNSS receivers at up to 30km on the antenna main beam heading. Although the level of amateur activity and the density of users is quite low (compared to other more popular bands) the issue remains that from a regulatory perspective the amateur services are required to not cause harmful interference to RNSS services.

The figure shows a sample of one result from one study submitted into ITU‑R and further illustrates the scale of the problem. In this example a station using an 18dBi gain antenna is used for both narrow band and wideband (ATV) transmissions and a range of power levels. The protection criteria for the RNSS receivers differs for narrowband and wideband interfering signals. The figure shows the distances out from the amateur station where the RNSS protection criteria could be exceeded along the antenna main beam heading.

These results have been developed based the ITU‑R defined receiver protection level for the GALILEO RNSS. For the narrow band modes this is ‑134.5dBW and for the wideband modes is ‑140dBW/MHz. In addition, measurement campaigns have shown that an improvement in the compatibility potential can be seen if the amateur signals avoid the centre portion of the GALILEO receiver passband.

Of course the studies cannot take into account every possibility that might mitigate the problem (e.g clutter, terrain blocking etc.) but it is clear that the potential for interference is considerable.

The IARU is working hard to ensure that the amateur service can continue to develop in this band and allow all the amateur applications in use today to continue. However, given the heavy spectrum occupancy of the band by the various RNSS systems it is evident that proposals will come calling to restrict our ability to operate in certain parts of the band and at the power levels possible today. IARU is totally engaged in the discussion of these considerations and these will continue within ITU‑R (and other regional bodies).

The IARU summary report on the WP4C meeting can be found at
https://www.iaru.org/wp-content/uploads/2022/05/IARU-Report-from-WP4C_May-2022.docx

Link to the full draft study https://storage.iaru-r1.org/index.php/s/BtpxWjL7La7syr7

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

Get The Details…

m5aka

AMSAT-UK

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AMSAT-UK Colloquium 2022 – Call For Speakers

Kents Hill Park Conference Centre Milton Keynes MK7 6BZ

This is the first call for speakers for the AMSAT-UK International Space Colloquium 2022 to be held as part of the RSGB Convention on October 8-9 at the Kents Hill Park Conference Centre, Timbold Drive, Milton Keynes, MK7 6BZ.

https://amsat-uk.org/colloquium/

AMSAT-UK invite speakers, about amateur radio, space and associated activities, for this event.

Submissions should be sent via e-mail: to dave at g4dpz.me.uk

AMSAT-UK also invites anyone with requests for Program Topics to submit them as soon as possible.

Likewise if anyone knows of a good speaker on subjects of interest to the audience, please send us details.

Get The Details…

m5aka

AMSAT-UK

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AMSAT-UK Space Colloquium October 8-9

Kents Hill Park Conference Centre Milton Keynes MK7 6BZ

AMSAT-UK is very happy to announce the 2022 AMSAT-UK International Space Colloquium will be held as part of the RSGB Convention on October 8-9 at the Kents Hill Park Conference Centre, Timbold Drive, Milton Keynes, MK7 6BZ.

The weekend event attracts an international audience that ranges from those involved in building and operating amateur radio satellites to beginners who wish to find out more about this fascinating branch of the hobby.

Booking for the RSGB Convention is at https://rsgb.org/main/about-us/rsgb-convention/

Booking for the AMSAT-UK dinner on the Saturday evening at the nearby Hilton Hotel is here

Details of the event can be found at https://amsat-uk.org/colloquium/

Get The Details…

m5aka

AMSAT-UK

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Amateur Radio and AMSAT-UK at EMFcamp 2022

The popular Electromagnetic Field event takes place June 2-5, 2022 at the Eastnor Castle Deer Park, Herefordshire.

Imagine a camping festival with a power grid and high-speed internet access; a temporary village of geeks, crafters, and technology enthusiasts that’s lit up by night, and buzzing with activity during the day. Thousands of curious people will descend on the friendly open space to learn, share, and talk about what they love.

EMF camp will feature a full program of talks and workshops and there will be both an Amateur Radio Village GX1EMF and an AMSAT-UK Village.

Amateur Radio Village https://wiki.emfcamp.org/wiki/Village:Amateur_Radio

AMSAT-UK Village https://wiki.emfcamp.org/wiki/Village:AMSAT-UK

Information on EMFcamp is at
https://www.emfcamp.org/
https://twitter.com/emfcamp

Get The Details…

m5aka

AMSAT-UK

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