As in 2019 the Brno Observatory and Planetarium organised a Picoballoon Channelnge in 2020. It's a competition of high altitude ballon probes, the one that sends it's altitude as the last one wins. Each probe must weight under 20 g and share at leas an approximate altitude in the telemetry messa...
In 2019 Brno Observatory and Planetarium together with Slovak Organisation for Space Activities organised a competition of high altitude balloon probes. The rules were simple, build a probe that weights below 20 grams. It should be able to send it's own position. They will launch it on a small ballo...