UBSEDS15 balloon launches from Bristol Saturday

UBSEDS balloon envelope

UBSEDS balloon envelope

In March the 434 MHz and APRS balloon UBSEDS14 flew around the northern hemisphere. On Saturday, April 30 a new balloon UBSEDS15 will be launched by the University of Bristol Students for the Exploration and Development of Space. The signal from the balloon may have a range of 400 km so should be receivable across the southern UK.

Richard Meadows M0SBU writes:

Another pico launch from Bristol this Saturday, April 30. The launch will be at 0900 ISH. As before the payload is transmitting on 434.600 MHz USB, with an output power of about +6dBm. Each transmission of Contestia 16/1000 will be preceded by 10 seconds of pips and RSID.

This payload uses solar panels to generate power. Hopefully the transmission rate will be once per minute during the day, and once every two minutes at night (if the payload operates at night). It’s also capable of transmitting APRS packets, but will only do so outside countries where the amateur license is not permitted airborne (like the UK).

It will probably head south quite quickly after launch, so trackers on the south coast are particularly appreciated. More details will appear on the website

UBSEDS14 tracker payload

UBSEDS tracker payload

Despite the weight constraints the team have managed to employ sophisticated Geofencing technology to prevent the balloon transmitting when over certain countries and also to select different APRS frequencies depending on the territory being overflown.

UBSEDS on Twitter

Online real-time tracking of balloons

Useful High Altitude Balloon Links

UBSEDS15 Solar Powered Balloon

UBSEDS14 around the world balloon

One of the students involved in the project is Richard Meadows M0SBU. He took the amateur radio courses run by the Chelmsford Amateur Radio Society (CARS) at Danbury in Essex. Further information on the courses is available from the CARS Training Manager
Email: training2016 at

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