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UK Civil Aviation Regulations

These are published by the CAA on our UK Regulations pages. EU Regulations and EASA Access Guides published by EASA no longer apply in the UK. Our website and publications are being reviewed to update all references. Any references to EU law and EASA Access guides should be disregarded and where applicable the equivalent UK versions referred to instead.

Version 1 of the UK aircraft noise contour model (ANCON-1) is described in DORA Report 9120. This supplementary report describes changes that have been made to upgrade the model to ‘Version 2’ standard (ANCON-2). Until a planned self-contained replacement for DORA Report 9120 is released, the two reports together provide an interim technical description of the ANCON-2 noise model as of June 1999.

The process by which ANCON-2 calculates noise exposure is, for the most part, the same as that of ANCON-1. The main change is that the contribution to Sound Exposure Level from an aircraft flight segment is now derived from Noise-Power-Distance tables as a function of engine thrust rather than from wholly empirical Reference Noise Levels (RNLs).

The first edition of the updated ANCON-2 model (‘ANCON-2.1’), used to produce the 1996 and 1997 Leq contours for the London airports, is described briefly in an appendix; however, like its predecessor, ANCON-2 will be subject to continuing development as the DORA database expands and internationally agreed modelling procedures are improved.
Status:
Current
Review comment:
-
Version:
1
Version date:
01-Jul-1999
View file:

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