Flights in and around the US are disrupted due to 5G roll out and concerns over adjacent spectrum

I think broadband is life changing. I’m also terrified to fly. So I’ve been watching the issues with American airlines and 5G roll out with one eye closed. The concern is that the 5G spectrum is very close to the spectrum that airlines use and older planes may not handle the potential interference well, as NPR reports

Rapport says the wireless carriers need more and more radio spectrum to carry more and more bits to our smartphones. The Federal Communications Commission auctioned off radio spectrum to the wireless carriers a big chunk of the “C” band of radio spectrum for about $80 billion in 2020. The segment of the spectrum in the “C” band purchased by AT&T and Verizon happens to sit right next to the frequencies used by radio altimeters in aircraft.

“The radio altimeters on our aircraft determine not only the height above the ground … as we come in for a landing or we’re taking off, but they’re tied to many other systems in our aircraft,” said Joe DePete, head of the Air Line Pilots Association, in a recent interview with Yahoo Finance.

Altimeters are critical for pilots to use during bad weather when visibility is poor. Pilots like DePete worry that strong 5G signals from cellphone towers placed close to airport runways could interfere with the radio altimeters.

“The issue is that some of the older planes and older aircraft equipment that were built maybe 30 or 40 years ago do not have very good band pass filters. They don’t have very good filters on their receivers,” says Rappaport.
It’s similar to the way that CB radios would sometimes interfere with old TV sets, before cable and digital signals, according to Rappaport.

The roll out was delayed for a week or so, and now has been modified to avoid areas near airports but that has not convinced everyone that it’s safe, as Bloomberg reports

Airlines around the world are adjusting their schedules and aircraft deployments for flights to the U.S. over fears that a 5G rollout by AT&T Inc. and Verizon Communications Inc. near American airports could interfere with key safety systems.

Dubai’s Emirates said it will suspend flights to several U.S. cities, including Chicago, Newark and San Francisco, while Japan Airlines Co. and ANA Holdings Inc. said they won’t fly their 777 jets to and from the U.S. mainland after a warning from Boeing Co. about how the model’s altimeter will be affected.

This entry was posted in Policy, Wireless by Ann Treacy. Bookmark the permalink.

About Ann Treacy

Librarian who follows rural broadband in MN and good uses of new technology (blandinonbroadband.org), hosts a radio show on MN music (mostlyminnesota.com), supports people experiencing homelessness in Minnesota (elimstrongtowershelters.org) and helps with social justice issues through Women’s March MN.

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