They are carrying one of G0UPL's QRP Labs Si5351A Synthesisers and firmware (used in his Ultimate 3 transmitters) on an Arduino Nano board.
GPS and other telemetry are being stransmitted on the 30m band via WSPR, JT9 and CW. Launched on 10 April, the balloons (tied together) headed east from Toronto and circumnavigated Greenland before crossing Europe and the Middle East. They are now moving north into Central Asia.
So far (18 April - 1800Z) they have traversed 18,000mi/30,000km!
Latest info on the balloon's position can be found here.
|One of 2 mylar "party store" balloons|