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Thu 24 Jul 2025
Nasa is testing how 5G could help future air taxis communicate with each other and reduce the risk of collisions.
5G networks are capable of managing masses of data at once and have very low signal latency compared with satellite systems – features that lend themselves well to providing location data between aircraft in busy city skies. Ground antennae and networks in cities can help air taxis stay connected as they fly over buildings, making urban flights safer.
But 5G is also poor at penetrating walls and buildings – especially at the higher-frequency, mmWave end of the spectrum. This can make it prone to signal dropouts that have the potential to hamper air taxis.
“The goal of this research is to understand how wireless cellphone networks could be leveraged by the aviation industry to enable new frontiers of aviation operations,” said Casey Bakula, lead researcher for the project.
“The findings of this work could serve as a blueprint for future aviation communication network providers, like satellite navigation providers and telecommunications companies, and help guide the Federal Aviation Administration’s [FAA’s] plan for future advanced air mobility network requirements in cities.”
The researchers built two specialised radio systems to study how well 5G performed under the conditions faced by air taxis. They said that if 5G networks could provide an “80% solution” to airborne communications, other teams could focus on identifying the remaining 20% that could be adapted to meet the needs of the industry.
The team placed one radio in a Pilatus PC-12 aircraft and set up another radio on the roof of the Glenn Aerospace Communications Facility building. With an experimental licence from the FAA to conduct flights, the team tested signal transmissions using a radio frequency band that regulators have dedicated for the safe testing of drones and other uncrewed aircraft systems.
The PC-12 flew various flight patterns near Glenn while measuring how the signal could weaken as the aircraft moved away from the ground station. Other patterns focused on identifying areas where nearby buildings might block signals, potentially causing interference or dead zones.
The team also studied how the aircraft’s angle and position relative to the ground station affected the quality of the connection and the impact of the propeller blades on signal strength.
Nasa plans to share its research with the FAA and the advanced air mobility sector of the aviation industry.
Dubai is planning to launch commercial air taxi services as soon as next year while the UK wants flying taxis and routine emergency service drones to be a reality by 2028.
Meanwhile, Chinese firm AutoFlight has recently delivered what it claims is the first air taxi with a maximum take-off weight exceeding one tonne. Dubbed CarryAll (pictured at top of article), the fully electric unmanned aircraft has been designated as airworthy by Chinese regulators and can fly at speeds up to 200km/h.