FUNcube-1 in continuous transponder mode

AO-73 (FUNcube-1) – Image credit Wouter Weggelaar PA3WEG

After some eight months in continuous sunlight, FUNcube-1 has now started to see some eclipses during each orbit.

The telemetry received has shown that the spacecraft continued to function perfectly during this period and the on board temperatures did not reach excessively high levels.

After this became clear, our next concern was the battery. Having been kept fully charged for this period, would it actually hold a charge and do its job when in eclipse?

After three weeks of increasing eclipse periods we can now see that indeed the Li battery appears to be ok and the bus voltage has not yet dropped below 8.1 volts.

So today we have changed the operating mode from high power telemetry educational mode to continuous amateur mode withe the transponder ON. The telemetry continues to be available, albeit at low power.

We will, of course, continue to carefully monitor the data but are planning to leave the spacecraft in this mode for at least the next week. Please enjoy using it!

Huskysat-1 Transponder is Open

Artist's impression of HuskySat-1 flying free in space but it's still attached to Breeze K/M rocket body

Artist’s impression of HuskySat-1 flying free in space but it’s still attached to Breeze K/M rocket body

After a week of testing, the transponder on HuskySat-1 is enabled and open for use and testing. It’s fairly sensitive, and 5-10 watts is plenty most of the time. There are some fades due to satellite orientation, and some passes are definitely better than others. The operations and engineering teams are also watching a few anomalies. Please keep an eye on the beacon during transponder ops, for those with spectrum scopes. Strong signals may impact the beacon strength.

HuskySat-1 CubeSat

HuskySat-1 CubeSat

HuskySat-1 is the Husky Satellite Lab at University of Washington’s first cubesat, and the first mission with AMSAT’s linear transponder module (LTM-1), a V/u transponder and integrated telemetry beacon and command receiver. UW recently completed their Part 5 operations and have graciously let AMSAT’s Part 97 transponder operations commence. This transponder module is available for use in educational cubesat missions willing to enable the transponder for worldwide use. Contact Drew KO4MA or VP Engineering Jerry Buxton N0JY for additional details.

Reports and observations are welcome to the Amsat-BB mailing list.

Congratulations to Husky Satellite Lab, and to the entire AMSAT Engineering team for keeping amateur radio in space. Thanks to Dr. Mark Hammond, N8MH for commissioning and operations support.

73, Drew KO4MA
AMSAT VP Operations

HuskySat-1 V/u inverting transponder, 145.910 to 145.940 uplink, 435.810 to 435.840 downlink, telemetry beacon 1200 baud BPSK at 435.800

HuskySat-1 Boards

HuskySat-1 Boards

Online Amateur Radio Satellite talk on Zoom

International Space Station - Image Credit NASA

International Space Station – Image Credit NASA

On Wednesday, May 13, at 1830 GMT (7:30pm BST) Robin Moseley G1MHU will give a talk on Zoom titled “Introduction to amateur satellites, meteor scatter, EME and ISS”.

The presentation is being organised by the Denby Dales Amateur Radio Society and being on Zoom it’ll be viewable on any Tablet or Smartphone with the Zoom App or from a Windows PC or Laptop.

The Zoom meeting ID is 278 609 9353

A range of other talks are planned to be available on Zoom, they include:

Tuesday 5th May 7.30pm BST Martin Butler M1MRB of ICQ Podcast – Talk on the Future of radio clubs – which way forward ?

Wednesday 6th May 7.30pm BST Open club discussion on using a VNA

Wednesday 13th May 7.30pm BST Introduction to amateur satellites, meteor scatter, EME and ISS Robin Moseley G1MHU

Wednesday 20th May Don Field G3XTT Editor of Practical Wireless magazine

Denby Dales Amateur Radio Society

Spring Issue of OSCAR News Available

Oscar News issue 229 March 2020 Front CoverE-members of AMSAT-UK can now download the March 2020 edition of OSCAR News, issue 229, here.

The paper edition edition is being sent to postal members and should arrive in the coming week.

In this issue:
• From the Secretary’s Keyboard
• QO-100 Wideband Transponder – 2020 Operating Guidelines and Bandplan
• AMSAT QO-100 NB Transponder Bandplan Update
• 5-watt 2.4 GHz amplifier kit for QO-100
• My experience with the AMSAT-UK 5W QO-100 Amplifier
• Review of the DJ0ABR 5W 2.4GHz Amplifier
• Under Development!
• AMSAT Files Comments Opposing Deletion of 3.4 GHz Band
• The eSatellite Award by eQSL
• Ad Astra!
• One Year of Operation for the Goonhilly WebSDRs for QO-100
• HuskySat-1
• How Phoenix went from a Paper Proposal to ASU’s First Student-Led CubeSat in Space
• The Qarman Cubesat
• The latest FUNcube Groundstation – in Antarctica
• From the Archives – An AMSAT-NA Symposium early this century

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.

Online Space Workshop May 2-3

Online Space Workshop 2020

Online Space Workshop 2020 #OSW2020

The Online Space Workshop #OSW2020 takes place this weekend May 2-3.

You can watch live on YouTube at

The full schedule of presentations is on the AMSAT Nepal site. Note the times are given in Nepali Time which is 5:45 hours ahead of GMT and 4:45 ahead of BST, see

Among the speakers are:

Tom Walkinshaw, founder and CEO of UK-based Alba Orbital, on Getting PocketQubes on Orbit, cheaply, regularly and reliably

Félix Páez EA4GQS, President of AMSAT Spain (AMSAT EA), on AMSAT EA PocketQube Missions and Designs

Julián Fernández EA4HCD, Co-Founder and CEO of Fossa Systems, on FOSSASAT-1, Data from the first IOT Picosatellites in Space

Follow AMSAT Nepal on Twitter at

First Guatemalan satellite deployed from the ISS

Quetzal-1 CubeSat - Credit Universidad del Valle de Guatemala

Quetzal-1 CubeSat – Credit Universidad del Valle de Guatemala

Guatemala’s first satellite, a small CubeSat called QUETZAL-1, was deployed from the International Space Station (ISS) on Tuesday, April 28, 2020.

Its primary mission is to test a sensor for remote data acquisition for natural resource management, which could be used to monitor water quality in inland water bodies.

QUETZAL-1 LogoThe satellite is part of the Japanese Kibo cubesat program, a product of the cooperation between, among others, the United Nations Office for Outer Space Affairs (UNOOSA), Universidad del Valle de Guatemala (UVG), and more institutions. The operational frequencies were chosen through cooperation from Guatemalan radio amateurs and the International Amateur Radio Union (IARU).

Downlink 4800 bps GMSK on 437.200 MHz.

The Quetzal-1 project team director is Guatemalan engineer José Bagur, TG8JAV, a graduate from mechatronics engineering at Universidad Del Valle.

Source IARU Region 2

IARU Quetzal-1

Quetzal-1 Telemetry info

Quetzal-1 Telemetry decoder

Follow Quetzal-1 on Twitter