Quantum navigation could solve the military’s GPS jamming problem

Other teams, like Q-CTRL, an Australian quantum technology company, are focusing on using software to build robust systems from noisy quantum sensors. Quantum navigation involves taking those delicate sensors, honed in the placid conditions of a laboratory, and putting them in vehicles that make sharp turns, bounce with turbulence, and bob with waves, all of which interferes with the sensors’ functioning. Even the vehicles themselves present problems for magnetometers, especially “the fact that the airplane is made of metal, with all this wiring,” says Michael Biercuk, the CEO of Q-CTRL. “Usually there’s 100 to 1,000 times more noise than signal.” 

After Q-CTRL engineers ran trials of their magnetic navigation system in a specially outfitted Cessna last year, they used machine learning to go through the data and try to sift out the signal from all the noise. Eventually they found they could track the plane’s location up to 94 times as accurately as a strategic-grade conventional inertial navigation system could, according to Biercuk. They announced their findings in a non-peer-reviewed paper last spring. 

In August Q-CTRL received two contracts from DARPA to develop its “software-ruggedized” mag-nav product, named Ironstone Opal, for defense applications. The company is also testing the technology with commercial partners, including the defense contractors Northrop Grumman and Lockheed Martin and Airbus, an aerospace manufacturer. 

COURTESY Q-CTRL

“Northrop Grumman is working with Q-CTRL to develop a magnetic navigation system that can withstand the physical demands of the real world,” says Michael S. Larsen, a quantum systems architect at the company. “Technology like magnetic navigation and other quantum sensors will unlock capabilities to provide guidance even in GPS-denied or -degraded environments.”

Now Q-CTRL is working on putting Ironstone Opal into a smaller, more rugged container appropriate for deployment; “Ironstone Opal’s first deployment was, and looked like, a science experiment,” says Biercuk. He anticipates delivering the first commercial units next year. 

Sensor fusion

Even as quantum navigation emerges as a legitimate alternative to satellite-based navigation, the satellites themselves are improving. Modern GPS III satellites include new civilian signals called L1C and L5, which should be more accurate and harder to jam and spoof than current signals. Both are scheduled to be fully operational later this decade. 

US and allied military users are intended to have access to far hardier GPS tools, including M-code, a new form of GPS signal that is rolling out now, and Regional Military Protection, a focused GPS beam that will be restricted to small geographic areas. The latter will start to become available when the GPS IIIF generation of satellites is in orbit, with the first scheduled to go up in 2027. A Lockheed Martin spokesperson says new GPS satellites with M-code are eight times as powerful as previous ones, while the GPS IIIF model will be 60 times as strong.