As the ongoing growth of air traffic puts airports under pressure for greater capacity and increased safety, an important investment and research effort is aiming to equip airports with Advanced Surface Movement Guidance and Control Systems (A-SMGCS). In the past ten years, most of the world’s largest airports have initiated the implementation of an A-SMGCS Surveillance function together with the deployment of multilateration (MLAT) and surface movements radar (SMR). However, regional airports could not afford the implementation of such surface surveillance technologies because of prohibitive infrastructure costs.