ARLA/CLUSTER: Radio-balão lançado por estudantes de Reino Unido já deu a volta ao Mundo

[João Costa > CT1FBF]

UK student balloon flies around the world

On Monday, March 21, 2016 the *UBSEDS14* balloon, launched by University of
Bristol students, completed its circumnavigation of the Northern Hemisphere

The University of Bristol Students for the Exploration and Development of
Space (UBSEDS) launched their balloon on Monday, March 8, powered by a
single AA Lithium Energiser Battery (LR91).

During the flight at an altitude of about 11,500m the balloon has been
transmitting telemetry data at 4 minute intervals using 5 dBm output of
Contestia 16/1000 on 434.600 MHz USB. Each telemetry packet is preceded by
10 seconds of 1Hz pips for manual alignment and a RSID tone for automatic
alignment with suitable software. Additionally the payload has the
capability for 144 MHz APRS.

The balloon has a diameter of 1.5m and the payload weighs just 21.3 grams.
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.

UBSEDS14 information is available at
http://www.bristol-seds.co.uk/hab/flight/2016/03/07/ubseds14.html

UBSEDS14 balloon launch
http://www.southgatearc.org/news/2016/march/
ubseds14_balloon_launches_today.htm
<http://www.southgatearc.org/news/2016/march/ubseds14_balloon_launches_today.htm>

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 are available from the CARS Training
Manager
Email: training2016 at g0mwt.org.uk
Web: http://g0mwt.org.uk/training
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