Quantum Sensing for Rail Positioning

Global navigation satellite systems (GNSS) are critical to our daily lives and underpin numerous sectors in-cluding transport, finance, and defence. The estimated financial impact of GNSS failure for the UK is over £1 bn per day [1]. In areas where GNSS cannot be used, inertial navigation provides an alternative to accurately position vehicles. For many applications, the drift in the classical accelerometers and gyroscopes that underpin inertial navigation systems limits the position accuracy that can be achieved.