TV signals use different parts of the radio spectrum to radar, but both bounce off solid objects.
Using special receivers, researchers said they were able to track up to 30 planes simultaneously flying at altitudes of up to 10,000ft (3km).
But they say more work has to be done.
“Questions around resilience and service standards need to be answered and we’d need to explore formal agreements with the broadcasters, but this is very exciting and we’ll be looking to further develop the concept over the next five years,” said Nats engineer Nick Young…..
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