Southampton University spaceflight society (SUSF) are involved in the construction of the ground segment of the spacecraft. This includes both the groundstation, the decoders and the data aggregation server.
SUSF have significant experience in high altitude balloon launches and downlinking data from the launched payloads in real-time.
You can find out more about the groundstation development on the SUSF wiki.
The UoS3 project is undertaken with the support of the Education Office of the European Space Agency, under the educational Fly your Satellite! Programme; an ESA educational programme complementing academic education.