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MLAT
- Usado para
- multilateration
- Definição1
- MLAT is the ICAO standard system used to identify the position of an aircraft based on an aircraft's transmission of a squitter or as response to an interrogation by a ground-based SSR or by active MLAT.
- Fonte1
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Handbook on radio frequency spectrum requirements for civil aviation. Montreal, 2014. (Doc. 9718 AN/957).
- Definição2
- Multilateration (MLAT) System is a group of equipment configured to provide position derived from the secondary surveillance radar (SSR) transponder signals (replies or squitters) primarily using time difference of arrival (TDOA) techniques. Additional information, including identification, can be extracted from the received signals.
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Annex 10 to the Convention on International Civil Aviation: aeronautical telecommunications: volume 4: surveillance and collision avoidance systems. Montreal, 2014. (Annex 10).
- Fonte3
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Assessment of ADS-B and multilateration surveillance to support air traffic services and guidelines for implementation. Montreal, 2012. (Cir. 326 AN/188).
- Fonte4
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Aeronautical surveillance manual. Montreal, 2010. (Doc. 9924 AN/474).
- Nota adicional1
- An MLAT relies on signals from an aircraft’s transponder being detected at a number of receiving stations. MLAT uses a technique known as TDOA to establish surfaces that represent constant differences in distance between the target and pairs of receiving stations. The aircraft position is determined by the intersection of these surfaces.
- Nota adicional2
- An MLAT requires a minimum of four receiving stations to calculate an aircraft’s position. If the aircraft’s pressure altitude is known then the position may be resolved using three receiving stations. However, in practice, operational MLATs have many more receiving stations to ensure adequate coverage and performance.
- Nota adicional3
- MLAT technique is a new technique providing independent cooperative surveillance.
- Contexto
- For radar, position integrity and accuracy are known performance characteristics and therefore are indicated as “fixed” in the table. However, for ADS-B and MLAT, those characteristics are dynamic and have also been derived into data elements that therefore have their own performance characteristics (latency, reliability).
- Português
- multilateração