|
Communication Navigation Surveillance / Air Traffic Management (Cns / Atm) Beyond 2012
 Arjun Singh Airport Authority of India Telephone No. +91-11-24649778 (R), +91-11-24653447 (O) Email: arjun_gps@yahoo.com Introduction The aviation industry plays a major role in world economic activity and remains one of the fastest growing sectors of the world economy. The need for change in the current CNS/ATM is due to two principal factors: Due to inherent limitations in the current system, it will not be able to cope-up with the growing demand of air traffic; and the need for global consistency in the providing air traffic services (ATS) while progressing towards a seamless CNS/ATM system. To maintain vitality of Civil Aviation, it has to be ensured that efficient, safe, secure and environmentally sustainable air navigation is available at the global, regional and national levels. This requires the implementations of a CNS/ ATM system that allows maximum use of enhanced capabilities provided by technical advances. In the technical advancement, the Global navigation satellite system (GNSS) has played the major role to change the scenario of the aviation industry and some of the forthcoming technology is being developed based on GPS technology for accurate positioning information which support the non- precision approach (NPA) and precision approach (PA) in all phases of flight. Emerging New Concepts on CNS/ATM: The following new emerging concepts may prove as performance measurement gauge for CNS /ATM system: i. Required Total System Performance (RTSP) concept: It is sum total of several components, such as airspace, flight operation and facilities/services provided. The required communication performance (RCP) and required surveillance performance (RSP) concept, which are being developed together with, required navigation performance (RNP) would be the intended basis for RTSP. ii. Required Communication Performance (RCP) concept: It refers to a series of communication performance requirements defined in terms of capability, availability, error averaging, traffic delay etc. A given airspace, any communication system or combination of the systems that complies with the specified parameters can be considered operationally acceptable. iii. Required Navigation Performance (RNP) concept: It is classified according to the flight path limits measured in nautical miles (NM) within which the aircraft should remain. Aircraft should be capable of maintaining that navigation precision with 95% probability. As a result, lower RNP values are equivalent to narrow limits near the boundaries of the terminal area. iv. Required Surveillance Performance (RSP) Concept: It defines the surveillance requirements according to the airspace involved. The surveillance system must provide the updated aircraft position in order to ensure a safe separation. In low- traffic oceanic / remote airspace, position information should be updated every 12 seconds. In high-traffic airspace, position information should be updated every 4 seconds. The surveillance system should allow users to select the preferred en-route flight path and conform fully to emergency procedures, contribute to search and rescue operations, and to allow for the application of separation in a defined airspace.
Page 1 of 5
| Next | |