As we increasingly rely on GPS for our day-to-day navigation, the growing threat of signal disruption has prompted researchers to explore alternative solutions. A recent study points to the potential of low-Earth orbit (LEO) satellite signals, like those from the Starlink and OneWeb constellations, as viable backups. As reported by The Ohio State University, these signals could notably help with ship navigation accuracy, particularly in challenging areas like the Arctic, where GPS coverage is not at its best.
The significance of this breakthrough cannot be overstated, given nearly all sectors—from transportation to finance—depend on the Global Navigation Satellite Systems (GNSS) such as GPS. Yet, with increasing cases of intentional jamming and spoofing, the need for an augmentative system has become more pressing. The study demonstrated how a ship sailing off the west coast of Greenland could reduce navigational errors from over a kilometer to approximately 27 meters, simply by leveraging the signals from these LEO satellites.
Zak Kassas, co-author of the study and TRC Endowed Chair in Intelligent Transportation Systems and professor of electrical and computer engineering at The Ohio State University, highlighted the urgent need for alternatives to GPS. "When you lose GPS on a plane or a ship there is no solution at the time being," Kassas told The Ohio State University. "What we showed is that there are solutions ready to be deployed in the field with existing systems."
The study, which won the IEEE Frederick W. Ellersick Award for Best Paper, springs from earlier efforts by Kassas' ASPIN lab, which first exploited Starlink for positioning. The team has been scaling up their research across the U.S., now venturing beyond terrestrial boundaries to challenge the Arctic, where OneWeb's satellites are abundant. Their work further reveals the latent utility of ambient signals for navigation.
The implications of this technology reach beyond the immediacy of more accurate navigation; it proposes a method to make location services not only more robust but also more secure. Considering the increasing frequency of GPS cyberattacks, some leading to international incidents, the study underlines the importance of stronger signals that are harder for bad actors to interrupt.
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