This paper presents the application of a relatively new concept, Required Navigation Performance (RNP), as a method to determine requirements for aircraft surface movement guidance and control. Currently, navigation standards do not exist for low visibility aircraft operations on runway and taxiway surfaces. Whereas there are enabling technologies under evaluation for aircraft guidance and Air Traffic Control surveillance on the airport surface, there are no performance requirements available to judge the suitability of specific systems. A top-down process is applied, starting with a target level of safety for each surface operation. RNP requirements are allocated to ground and airborne equipment and an approach is presented to validate the RNP allocations using a Functional Hazard Assessment (FHA).
Multilateration (MLAT) surveillance is now being used in all types of airspace for air traffic management. MLAT can be used for airport surface movement surveillance as well as for terminal and en route surveillance, using Wide Area Multilateration (WAM). MLAT is a low-cost technology that not only has major advantages in operations and maintenance, but also provides excellent performance under all conditions, especially for countries with large geographic areas or mountainous terrain to cover. This paper focuses on performance metrics from operational system data to demonstrate that the performance of Era's MLAT systems meet surveillance requirements for all surveillance applications. This includes the key performance requirements for the various surveillance applications that are evaluated, including accuracy, coverage, update rate, integrity and availability.
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