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FAA lists 50 airports that will have 5G buffer zones

Carriers will turn off nearby transmitters for six months due to safety concerns

The US Federal Aviation Administration (FAA) has announced a list of 50 US airports that will include 5G exclusion zones for the next six months.

The list is part of a deal reached with wireless carriers earlier this month that will prevent potential wireless interference with aircraft safety systems.

In a letter to the FAA on January 2, the carriers agreed to delay deployment of their C-band 5G infrastructure for two weeks and to turn off transmitters around these airports for six months to avoid interference with aircraft instruments.

The move followed concerns that the C-band spectrum in the 3.7-3.98GHz range could cause problems with aircraft safety systems. The Administration's technical standards for radio altimeters, which operate between 4.2 and 4.4GHz, had not considered potential interference from adjacent bands. These devices are used during low-visibility landings.

The airports listed include some of the country's largest and busiest, such as Los Angeles International (LAX), Chicago O'Hare (ORD), Dallas Forth Worth (DFW), and New York's JFK. However, Atlanta's Hartfield-Jackson (ATL), a major transport hub and one of the world's busiest airports in terms of passenger traffic, was not listed.

"Many airports are not currently affected by the new 5G deployment, even though they are not on this list," the FAA said in a statement. "These include airports not in the 46 markets where the new service will be deployed and airports that do not currently have the ability to allow low-visibility landings."

The temporary move mirrors more permanent measures in Europe, where wireless carriers routinely lower power levels around airports to avoid interference, the FAA said. "For years, we have been working to find a solution in the United States," it added.

Under the deal with wireless carriers, the FAA and Department of Transportation have agreed not to extend delays to C-band rollout or resumption of routine operations for wireless carriers.

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