The main radio transmitter for Carmarthenshire also has power problems leaving over 300, 000 people without services.

BBC: Wales snow: Schools, roads and airport closed

The main Carmel radio transmitter serving Carmarthenshire also had power problems affecting 300, 000 people, however it is now working again with reduced power.

BBC: Western Power supplies cut by snow in south and west Wales

By communicating with earth along the chain, the main probe would be able to carry a smaller and lighter transmitter than it would otherwise have to.

ECONOMIST: Picosatellites