333 - HP-MLAT (High Precision Multilateration)

HP-MLAT is an innovative high-precision multilateration system designed for airport surveillance and air traffic management. By combining advanced ADS-B receivers with White Rabbit time synchronisation technology, HP-MLAT enables sub-nanosecond synchronisation between distributed receiver stations and is designed to achieve positioning accuracy better than 5 metres for aircraft and ground vehicles.

Unlike conventional MLAT solutions that typically rely on GNSS for precise time synchronisation, HP-MLAT significantly reduces its dependence on satellite-based timing. This makes the system more resilient to GNSS jamming and spoofing, which can compromise the reliability of conventional surveillance systems.

HP-MLAT delivers a new level of positioning accuracy, timing precision and operational resilience, supporting safer, more reliable and more efficient airport operations.