GPS-independent Navigation

Farm robots, drones or tractors often suffer from unreliable GPS signals, for instance under dense tree canopy, near large metal farm buildings, or in remote / shielded zones. This makes automated farm operations (e.g. spraying, harvesting, monitoring) unreliable.

A compact quantum magnetometer (e.g. based on diamond NV-centres) could be used to measure Earth’s magnetic field very precisely and detect small, location-dependent magnetic anomalies. When combined with an inertial navigation system, the vehicle can locate itself without satellites by matching its magnetic measurements to a pre-surveyed “magnetic map” of the farmland.

This could enable more reliable, continuous navigation for autonomous agricultural machines, allowing GPS-independent automation of tractors, drones and robots even under forested canopies, inside barns or in GPS-denied zones. This increases operational robustness, reduces reliance on satellite signals, and supports precision farming.