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Washington View: 5G, PNT, and Air Safety

Updated: Apr 27, 2023

A deadlock over 5G implementation, and the potential hazards the technology would create for air traffic safety, has been at least temporarily resolved. Not all questions have been answered nor problems eliminated, however. And while radio altimeters do not use GPS or GNSS technology, they are definitely PNT devices, and this situation could create precedents for ongoing and future conflicts between telecom and PNT use of the finite radio spectrum.

Topics: 5G; FAA; infrastructure; FCC; C-band; Special Airworthiness Information Bulletin (SAIB) AIR-21-18, Risk of Potential Adverse Effects on Radio Altimeters; NTIA: RTCA Paper No. 274-20/PMC-2073, Assessment of C-Band Mobile Telecommunications Interference Impact on Low-Range Radar Altimeter Operations.

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