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Japan solves 5G airliner conundrum: Keep mobe masts 200m from airport approach paths. That's it

jtaylor

If radalts can't filter out a signal over 200MHz out of band there is something very wrong with them. Who allowed such shoddy equipment to be used to fly hundreds of people in a metal tube ffs?

It's not just what the radio altimeter can accept, it's also what might be sent to it.

Airplane equipment is safety critical. It's regularly re-tested. Airport electronics like ILS transmitters are too. In fact, not only are the transmitters re-tested regularly, but they are also tested from specially equipped airplanes to detect if something else is screwing with the signal.

In the US, telcos are lighting up powerful radios intended to transmit on frequencies close to air navigation frequencies, at locations close to airports. What if one malfunctions or the signal gets distorted? Will these be treated as safety-critical equipment?

Manufacturers, the FAA, and airlines around the world have expressed serious and specific concerns about the safety of this rollout. If that's not sufficient to take this seriously, what is?

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