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The Sun: How it controls the invisible Reflector above the Earth
Continuing the series on our "local star". How the Sun creates the Earth's ionosphere which in turn makes short wave radio transmission possilbe. With guest science writer John Gribbin. Plus, the fact sheet available for the Tatung TMR-7602 World band receiver.
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成人论坛 World Service Archive
This programme was restored as part of the World Service archive project
