Quantum magnetometers and Starlink signals line up as GPS backups as jamming spreads

What's happening? Satellite-navigation jamming is now routine around conflict zones, and The Economist reports that research led by Todd Humphreys has linked broad interference across Europe since 2019 to Russian satellites. That is pushing two alternatives to GPS towards market: magnetic navigation and positioning from other satellites' radio signals.

Magnetic navigation: Q-CTRL's Ironstone Opal system reads Earth's crustal magnetic field with quantum magnetometers and matches it to anomaly maps. In published field trials it delivered up to about 46 times lower positioning error than a strategic-grade inertial navigation system, with a best result of 22 metres on a flight, using only public magnetic maps. Canada's SBQuantumDealroom has a profile for this one. Try Dealroom → uses a nitrogen-vacancy diamond magnetometer that also measures field direction, and is surveying for better maps. SandboxAQ has proposed a global mapping effort, which The Economist says US quantum-sensing research orders are encouraging. Accurate crustal maps remain the bottleneck.

Signals of opportunity: The Economist reports that Matrix, from ASPIN Lab, used Doppler shifts from 21 Starlink and OneWeb satellites to fix a cruise ship near Greenland to within 27 metres. Satellite manoeuvres can still cause errors of 100 metres to over a kilometre, but SpaceX publishes orbit predictions for its 11,000-plus satellites. Matrix is licensed to commercial and military users, with market readiness expected within about two years.

The signal: Resilient positioning is becoming a dual-use deep-tech category in its own right, with quantum sensing one of the few areas already showing field-tested advantage over classical systems.

Read more: The Economist, Q-CTRL MagNav field-trial paper (arXiv)