Description

Wide-area multilateration is a Surveillance technique that exploits the 1090 MHz transmissions broadcast from aircraft. From these signals it can create a track containing parameters such as aircraft identification, position, height, etc. Active interrogation is also possible in order to trigger transmission.

Although the manner in which WAM constructs Surveillance data differs significantly from Automatic Dependent Surveillance Broadcast (ADS-B), the synergies between these two Surveillance techniques in addition to their high performance and lower cost are expected to bring significant operational benefits. Consequently, composite WAM/ADS-B systems are widely offered by industry and deployed by ANSPs in Europe and worldwide, thus exploiting these synergies.