QB50 ISS CubeSat Deployments Phase 2

QB50 ISS LogoThe second phase of QB50 CubeSats deployments from the International Space Station is now expected to take place this Thursday and Friday, May 25-26 GMT.

Check QB50-CubeSat Mission for updates.

Download the QB50 ISS CubeSat Deployment and Radio Information v3 PDF

Built by university students and research organisations from 23 countries around the world, the QB50 constellation aims to study the lower thermosphere 200-380 km above the Earth.

11 QB50 CubeSats were deployed in the first phase and a further 17 will be deployed in the second phase. The beacons should be activated about 30 minutes after deployment.

The QB50 CubeSats have downlinks between 435.7 and 438 MHz and reports from radio amateurs are most welcome. Beacon data received can be uploaded to a dedicated QB50 webpage at

LilacSat-1 (ON02CN), which deploys at 0815 GMT on Tuesday, May 23, is carrying a FM to Codec2-BPSK Digital Voice transponder, an APRS digipeater and camera. Further information at

Two of the ISS QB50 CubeSats deployed in the first phase, ON01FR 437.020 MHz and ON05FR 436.880 MHz, carry V/U FM transponders. The uplink frequency for both is 145.860 MHz with 210.7 Hz CTCSS, see http://site.amsat-f.org/2017/05/12/qb50-document-de-description-des-telemesures-des-satellites-on01fr-on05fr/

List of QB50 CubeSats with Beacon format and frequency information

Keplerian Two Line Elements (TLEs) ‘Keps’ for new satellites launched in past 30 days

QB50 project https://www.qb50.eu/
Twitter: https://twitter.com/QB50Mission

On the deployment days radio amateurs and QB50 teams will be on the #CubeSat IRC channel. Join the deployment chat at http://irc.lc/freenode/cubesat

Don’t have a suitable 435-438 MHz receiver? Try listening online with the SUWS WebSDR located near London http://websdr.suws.org.uk/

On June 19, 2014 two precursor QB50 CubeSats were launched, QB50p1 and QB50p2, which carried amateur radio transponders