The second phase of QB50 CubeSats deployments from the International Space Station which was planned for May 23-25, 2017 has been postponed.
UPDATE May 21: QB50-CubeSat Mission Tweeted:
The second #QB50 airlock cycle has been delayed due to contingency EVA that will occur this week on ISS. We will keep you posted!
Download the QB50 ISS CubeSat Deployment and Radio Information v2 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
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