Q-CTRL, an Australian quantum technology company, is developing software aimed at enhancing the reliability of quantum sensors for navigation purposes. Quantum navigation relies on delicate sensors, which function well in controlled lab conditions but face challenges in dynamic environments such as vehicles that experience sharp turns, turbulence, and waves. The metallic structures of these vehicles can interfere with the sensors’ measurements, contributing to a noise ratio that is often 100 to 1,000 times greater than the actual signal, according to CEO Michael Biercuk.
In trials conducted last year using a modified Cessna, Q-CTRL engineers tested their magnetic navigation system. They employed machine learning techniques to analyze the data, successfully isolating the signal from the background noise. According to Biercuk, this approach allowed them to track the aircraft’s location with an accuracy 94 times greater than that of a conventional inertial navigation system. The results of these trials were shared in a non-peer-reviewed paper published in the spring.
In August, Q-CTRL received contracts from DARPA to further develop its magnetic navigation product, named Ironstone Opal, for defense applications. The company is collaborating with major industry players including Northrop Grumman, Lockheed Martin, and the aerospace manufacturer Airbus to test this technology.
Michael S. Larsen, a quantum systems architect at Northrop Grumman, highlighted the potential of magnetic navigation and other quantum sensors to offer guidance in environments where GPS signals are limited or unreliable. Q-CTRL is currently working on a more compact and rugged version of Ironstone Opal and plans to deliver the first commercial units next year.
In parallel, the satellites used for traditional navigation are also improving. The upcoming GPS III satellites will incorporate new civilian signals designed to enhance accuracy and resistance to jamming. Military users will have access to fortified GPS tools, including M-code signals and Regional Military Protection features, aimed at providing reliable navigation capabilities in specific geographical areas. These advanced systems are expected to be operational by the late 2020s.
Source: https://www.technologyreview.com/2025/12/16/1129887/quantum-navigation-militarys-gps-jamming-problem/