The first phase of QB50 CubeSats should be deployed from the International Space Station over three days May 16-18, 2017.
Download QB50 ISS CubeSats Deployment and Radio Information PDF
Update May 16:
3rd deployment 0145 GMT May 17
7th deployment 0825 GMT May 18
PE0SAT SatPC32 doppler.sqf data
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.
There are 28 QB50 CubeSats on the ISS awaiting deployment and it is understood that 11 will be deployed in this first phase. The beacons should be activated about 30 minutes after deployment.
The QB50 CubeSats have downlinks between 435.8 and 438 MHz and reports from radio amateurs are most welcome. Beacon data received can be uploaded to a dedicated QB50 webpage at
Two of the ISS QB50 CubeSats, 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