Radio amateur G3YJO on BBC Radio 4

Professor Sir Martin Sweeting G3YJO

Professor Sir Martin Sweeting G3YJO

Radio amateur Professor Sir Martin Sweeting G3YJO, was the guest on the Radio 4 show The Life Scientific that was broadcast on Tuesday, April 20.

Martin Sweeting G3YJO pioneered the original SmallSats revolutions with the UOSAT-1 and UOSAT-2 spacecraft that carried amateur radio payloads and launched in the early 1980’s. They led to the founding of Surrey Satellite Technology Ltd (SSTL) of which he is Executive Chairman.

You can listen to, or download, an MP3 recording of the BBC show which mentions amateur radio and AMSAT from the BBC website at

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Spring issue of OSCAR News now available

Oscar News issue 233 March 2021 Front CoverE-members of AMSAT-UK can now download the March 2021 edition of OSCAR News, issue 233, 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
• Minutes of the Annual General Meeting
• Changes to AMSAT News Service Bulletins Distribution
• QO-100 Wideband Transponder – 2021 Operating Guidelines and Bandplan
• First QO-100 satellite contact from Indonesia
• AO73 – FUNcube-1 in Space
• A Gain and Power Upgrade for the AMSAT-UK Filtered S Band Driver Amplifier
• The current state of space debris
• CHESS – A cubesat constellation for atmospheric analysis of earth
• It is getting even busier up there!

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.

Contests on QO-100 allowed in time for Yuri Gagarin contest

AMSAT QO-100 NB Transponder BandplanOn April 4, AMSAT-DL announced the opening of the QO-100 NB satellite transponder to general contest operation in the upper mixed-mode range. This weekend (April 10-11) will see the Yuri Gagarin contest.

The contest area on the QO-100 geostationary satellite NB transponder for both CW and SSB is:

Uplink area 2400.370 – 2400.490 MHz
Downlink area 10489.870 – 10489.990 MHz

Of course, the usual QO-100 NB transponder guidelines also apply here. Therefore, the bandwidth should still be limited to 2.7 kHz and the transmitting power should be reduced to the necessary level, i.e. only as much power as necessary should be used.

Read the AMSAT-DL announcement at

The Yuri Gagarin International DX Contest 2021 is dedicated to the memory of Yuri Gagarin, who realized the first human flight to space, on April 12, 1961.

It runs from 2100 GMT on April 10 until 2100 GMT on April 11, 2021, and the categories include:
• SAT Single operator – Satellite QSOs
• SAT-GS Single operator – Geostationary Satellite QSOs

Contest rules are at

More than a million UVQSat telemetry frames received

AMSAT-Francophone Logo

AMSAT-F have issued an update on the UVQSat CubeSat, they plan to conduct further test on the FM transponder.

In a post to the AMSAT Bulletin Board the AMSAT-F President Christophe Mercier says:

More than 1,200,000 frames have been received on the AMSAT-F experimental database this week

It is possible to visualize the data via an online Dashboard:

These data were collected by more than 50 stations in the world via the UVSQsat decoder software. The software allows to send the data to the AMSAT-F and Satnogs databases. The continuous reception of telemetry is valuable to the project team that is piloting the satellite.

Although the downloading of large amounts of data is done over Europe, this also took place over Japan with the help of Japanese radio amateurs.

It is noted that a new version of the UVSQSAT Decoder software is available with new features (new ASCII telemetry decoded, performance improvement,..)

The commissioning phase has been successfully completed. Now the UVSQsat project team with Radioclub F6KRK and AMSAT-Francophone will conduct further tests on the transponder to ensure that it can be operated over a period of several days without taking any risk to the satellite.

For this we are looking for volunteer radio amateurs to participate in these tests on all continents. If you are interested contact AMSAT-Francophone, email amsatf<at>

Christophe Mercier
AMSAT-F president

Soyuz‑2.1a launch – Amateur radio satellites deployed

Soyuz 2.1a Launch March 22, 2021 - Credit GK Launch Services

Soyuz 2.1a Launch March 22, 2021 – Credit GK Launch Services

The Soyuz‑2.1a LV was launched from Baikonur in Kazakhstan on March 22, 2021. The following satellites, operating in frequency bands allocated to the amateur satellite service have been coordinated by the IARU Satellite Frequency Coordination Panel:

• Beesat‑5
• Beesat‑6
• Beesat‑7
• Beesat‑8
• GRBAlpha
• KSU_Cubesat
• DIY‑1
• CubeSX-HSE
• CubeSX-Sirius-HSE
• Orbicraft-Zorkiy
• NanoSatC-BR2

Operating in frequency bands allocated to the amateur satellite service without IARU frequency coordination is KMSL. Additional satellites may follow.

Operating in frequency bands allocated to the amateur satellite service while the IARU Satellite Frequency Coordination Panel has declined coordination are UNISAT‑7 and WildTrackCube-Simba.

Further information including the IARU coordinated frequencies at

Amateur radio satellites deploy March 14

BIRDS-4 Satellite DeploymentEight satellites, all coordinated by the IARU Satellite Frequency Coordination Panel, are planned to be deployed from the International Space Station on Sunday, March 14.

ISS CubeSat deployment on March 14, 2021 - image by astronaut Soichi Noguchi KD5TVP

ISS CubeSat deployment on March 14, 2021 – image by astronaut Soichi Noguchi KD5TVP

The deployment should be streamed live on YouTube, watch from 09:15 GMT [UPDATE deployment now expected after 10:30 GMT]

The CubeSats being deployed are:
• GuaraniSat‑1 (BIRDS‑4)
• Maya‑2 (BIRDS‑4)
• Tsuru (BIRDS‑4)
• RSP-01
• WARP-01

It is understood the BIRDS-4 satellites are carrying digipeaters and TAUSAT‑1 has an FM transponder. Further information including the IARU coordinated frequencies are at