Spectrum Wars Continue Summer Sizzle | Aviation International News

Spectrum Wars Continue Summer Sizzle

Global aviation industry continues to deal with safety, navigation issues posed by wireless 5G C-band and L-band systems.

5G tower — (Photo: AdobeStock)

By Mark Huber • Contributor

August 1, 2023

This summer the spectrum wars have continued between the wireless and aviation industries in the U.S. Initially, stakeholders tried to tackle the issue of 5G C-band interference on radio altimeters (radalts). Now the field of play shifts to the potential of the Ligado Wi-Fi system to disrupt GPS/GNSS satellite navigation on the L-band.

After delays triggered by aviation industry concerns over 5G C-band interference on aircraft radalts and cellular companies’ temporary agreement to restrict a wider roll-out of the service and/or the full power of certain transmitters, the FAA-imposed July 1 deadline came for aircraft to either be equipped with interference-tolerant radalts or refrain from operations susceptible to 5G interference (under Airworthiness Directive 2023-10-02). That includes low-visibility approaches. Air carriers not equipped with interference-tolerant radalts will not be allowed to operate in U.S. airspace beginning in 2024.

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