QSL cards and award for receiving SWSU satellites

CubeSat released from the ISS

CubeSat released from the ISS

On July 21 ten amateur radio CubeSats built by students at the Southwestern State University were deployed from the ISS. QSL cards and a diploma are available for receiving the SSTV, APRS and Voice messages

On his website Dmitry Pashkov R4UAB reports:

Small spacecraft (ICA), created on the YUZGU-55 platform, have been operating in real space flight for more than ten days. The cyclogram of work includes the transmission of voice messages, telemetry, call sign and SSTV images.

In view of the great interest in the space experiment “Radioskaf”, which is aimed at popularizing space research, Southwestern State University will be happy to send a QSL card to all radio amateurs who have successfully conducted a communication session with satellites.

To receive a QSL card, you need to send information: call sign, location, session date and time, carrier frequency, modulation type (APRS, FM-Voice, Robot36) and the result of a successful session (audio sample, telemetry text and image). The data is sent in the form of Applications for QSL. In the return letter you will receive the address where you need to send the card.

To obtain a diploma, you need to take 10 different SSTV images and voice messages, as well as decode 10 APRS telemetry messages (AFSK 1142 baud format) from any of the satellites, and apply for a Diploma

Satellite frequencies:

437.0000 MHz — SWSU-55 #8 — RS6S
437.0125 MHz — KETs#2 — RS12S
437.0250 MHz — KETs#1 — RS9S
437.0500 MHz — SWSU-55 #1 & R-390 #1 — RS10S
437.0750 MHz — SWSU-55 #2 — RS11S
437.0750 MHz — SWSU-55 #3 — RS1S
437.0870 MHz — SWSU-55 #4 — RS2S
437.0870 MHz — SWSU-55 #6 — RS4S
437.1000 MHz — SWSU-55 #5 — RS3S
437.1125 MHz — SWSU-55 #7 & R-390 #2 — RS5S

Source R4UAB

Nader Omer ST2NH describes how to receive the satellites at

Ten amateur radio CubeSats deployed from ISS

Summer 2022 OSCAR News now available to download

2022-06 Oscar News Front CoverE-members of AMSAT-UK can now download the Summer 2022 edition of OSCAR News, issue 238, here.

The paper edition edition will be sent to postal members and should arrive in the next 2-3 weeks.

In this issue:
• From the Secretary’s Keyboard
• CelesTrak Changing Domain Used
• Our thanks to – Frank Heritage M0AEU
• Retirement Letter
• FUNcubes update June 2022
• FUNcube-Next
• STAR-XL: Student Transponder for Satellite Ranging on X & L-band
• First flight of Vega-C
• New HO-113 AMSAT Distance Record Set
• Satlist a valuable resource!
• Satellite Operations from the Gambia
• Electromagnetic Field
• G3OUA Works CN88
• Increase in Satellite activity from Jersey
• GB70U Guernsey
• IARU Region 1 Satellite Coordinator’s report
• ARISS Women in Space SSTV Activity

AMSAT-UK FUNcube Mission Patch

AMSAT-UK FUNcube Mission Patch

Membership of AMSAT-UK is open to anyone who has an interest in amateur radio satellites or space activities, including the International Space Station (ISS).

E-members of AMSAT-UK are able to download the quarterly publication OSCAR News as a convenient PDF that can be read on laptops, tablets or smartphones anytime, anyplace, anywhere. Join as an E-member at Electronic (PDF) E-membership

PDF sample copy of “Oscar News” here.

Join AMSAT-UK using PayPal, Debit or Credit card at

E-members can download their copies of OSCAR News here.

1240-1300 MHz: ITU-R WP5A Meeting Report

Galileo LogoIARU report on the recent meeting of ITU-R WP5A, the lead group responsible for developing the Conference Preparatory Meeting report about the WRC23 agenda item on the 23cm band.

The latest meeting of ITU-R WP5A concluded on June 2, 2022. The IARU was represented by Ole Garpstad (LA2RR – ITU Lead) and Barry Lewis (G4SJH – WRC23 AI9.1b Lead).

ITU-R WP5A is the study group at ITU which deals in part with topics related to the amateur and amateur satellite services. It is the lead group responsible for developing the Conference Preparatory Meeting (CPM) report on agenda item 9.1(b).

This Agenda Item provides for a “Review of the amateur service and the amateur-satellite service allocations in the frequency band 1240‑1300 MHz to determine if additional measures are required to ensure protection of the radionavigation-satellite (space-to-Earth) service operating in the same band in accordance with Resolution 774 (WRC‑19);” The CPM Report will form the basis for consideration of this issue at WRC-23 next year.

At the conclusion of the recent WP5A meeting a draft recommendation was prepared which will provide guidelines to administrations to ensure the protection of the RNSS primary allocation from the secondary amateur and amateur satellite services.

The draft recommendation will be the most important element of the WP5A work going forward for the amateur and amateur satellite services in the 23cm band. The working document contains a number of proposals for severe limitations on amateur usage of the band including transmitter power constraints. Very low power levels are proposed for large portions of the band (100% in one case). Proposals also identify possible frequency band usage limitations for broadband applications (e.g. ATV), narrowband applications and amateur satellite services in 1260-1270 MHz.

A full report of the WP5A meeting can be found here.

None of these proposals are adopted at this time and work will continue at the next meeting of WP5A to rationalise the variations proposed by national telecom-administrations.

The IARU will work to minimise the constraints on amateur radio activities and continue to seek amendments to the draft recommendations through the ITU process, but as a secondary user, radio amateurs should understand the need to protect the Radionavigation Satellite Service (RNSS) in many consumer and industry applications (like autonomous vehicles) that will lead to some restrictions on our use of the 23 cm band.

FUNcube-1 / AO73 Update

The Queen's Platinum Jubilee 2022Many will be aware that FUNcube-1 has been transmitting a special Fitter message to commemorate her Majesty the Queen’s Platinum Jubilee earlier this month.

Everyone who receives this message and uploads it to the Data Warehouse using the Dashboard can generate a certificate to remember this historic event. The special message includes a link to a website that has the full instructions. It is intended to keep this message active until the end of June.

The spacecraft’s orbit continues to run near the sun’s terminator and this is resulting in less than optimal solar power generation. The battery bus voltage is now centering around 7.45 volts rather than the 8+ volts that we have seen for many years. We believe that this reduced voltage level may be due to a combination of factors, illumination levels, battery and/or solar panel degradation or, possibly, gradual changes in some component values within the EPS. It is also possible that the high spin/tumble rates that we experienced over the recent months may be involved. Our thanks to to Colin VK5HI and his team for continuing to keep track of this issue for us.

Operators may have noticed that the spacecraft is now in high power telemetry mode when in sunlight and in receive only mode during eclipse. Although the transponder is not currently active, with the rapid fading presently being experienced on the downlink, the high power telemetry setting will assist listeners to decode the data more easily.

We continue to be extremely grateful to all those stations who continue to contribute their data to the FUNcube data warehouse. The information you are providing is invaluable to the FUNcube to team and will greatly assist us in managing the spacecraft through its “middle age” after more than eight years in space!

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

Galileo 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.

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.

RNSS Protection Criteria

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

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

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

AMSAT-UK Colloquium 2022 – Call For Speakers

Kents Hill Park Conference Centre Milton Keynes MK7 6BZ

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.


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.