Room Area System Increase
See also: LAAS
The Local Area Augmentation System (LAAS) is a lander of plane all times based on the differential correction real-time of the signal GPS. In an airport, local receiving GPS of reference send data to a central system to the airport. These data are used to form a message of correction, which is then transmitted to the users (planes) via a connection of data transmission VHF. A receiver embarked on the aircraft uses this information to correct signals GPS, and can then provide a standard posting They to be used while sailing in precision approach. The International Civil Aviation Organization (ICAO) calls this type of system a Ground Based Augmentation System (GBAS) .
In 2001, the LAAS was able to carry out a precision They of category III, 16 m into side and 4 m into vertical. The goal of program LAAS was to give further information They of category III. FAA did not specify the minimal precision required for the error They of category III. However, an approach They of category III makes it possible the plane to attérir with a Visibilité zero by using systems of car-attérissage and indicates a high degree of accuracy from < 1 Mr.
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