SS

In its recent guidance material for A-SMGCS implementation, EUROCONTROL has removed references to 'Levels' and has opted for a functional definition. Functions/services are referred to by name, in order to avoid confusion with the ICAO Manual and to dispel the assumption that the functions need to be implemented in numerical order. There is no contradiction between the two definitions by ICAO and EUROCONTROL as they provide the same functionalities from a different perspective.

ADEXP is a format, not a protocol. No restrictions are imposed on the transmission media or protocols to be used, other than that of the character set. ADEXP provides a format for use in on-line, computer to computer message exchange and for message exchange over switched messaging networks (e.g. AFTN, CIDIN, AMHS).

The Base of Aircraft Data (BADA) is an Aircraft Performance Model (APM) developed and maintained by EUROCONTROL, with the active cooperation of aircraft manufacturers and operating airlines. The BADA APM is designed for simulation and prediction of aircraft trajectories for purposes of ATM research and operations. Aircraft performance parameters and trajectories can be calculated using information and data contained in BADA. To replicate reality in both operational and research modelling and simulation systems, each and every real aircraft needs a corresponding aircraft model. BADA factsheet: http://www.eurocontrol.int/sites/default/files/publication/files/bada-factsheet.pdf

ASTERIX  (short for  All Purpose Structured Eurocontrol Surveillance Information Exchange ) is a standard for the exchange of  air traffic services  (ATS) information. It is developed and maintained by the  European  ATS organization  Eurocontrol . ASTERIX not only stands for All-Purpose Structured Eurocontrol  Surveillance   Infor mation  Exchange but also represents a state-of-the-art surveillance  data  format which is nearly being adopted by the world users  community  as the universal  standard  in this  domain  today

ARTAS is a system designed by  Eurocontrol  in order to help in  Aerial surveillance  and  Air traffic control . It can establish an accurate Air Situation Picture of all traffic over a well-defined geographical area (e.g.  ECAC ), and to distribute the relevant surveillance information to a community of user systems.