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SAFT

(Simulation of atmosphere and Air traffic For a quieter environmenT)

Within the SAFT-project, running from 2016-2019, methods and a computer program for aircraft noise propagation and contour simulation were developed.

The SAFT simulation platform covers several methods for aircraft noise mapping, from a so called integrated method, a standard ECAC Doc.29 implementation, over more advanced, and potentially more accurate simulation methods accounting for “real” atmosphere/sound propagation conditions as well as for directive and frequency dependent noise sources.

In its current phase of development SAFT is aimed for noise mapping of single aircraft pass-by events and is run by interactive input for each case. Possible runs and studies cover: new approach routes for existing aircraft and standard procedures, new procedures and profiles, noise footprints from todays or not yet existing aircraft.

The SAFT architecture and design is made with the intentions to establish a research tool that combines the features of:

  1. State of the art scientific and technical level.
  2. Easy to understand and use.
  3. Usefulness – i.e. filling the gaps/shortcomings of today’s standard integrated methods such as offering the capabilities of producing ground noise patterns that better reflects a real air traffic and prevailing weather and its variation - could be for an existing traffic situation, runway use or for new runways, aircraft, procedures or flight route design.
  4. Flexibility in terms of integrating future updates such as new methods, algorithms as well as functionality.

Example:

Sample SAFT runs. Left: A321-232 approach/landing with “real weather” data refractive sound propagation. Right: Difference in dB:s between SAFT (as in left fig.) with standard ECAC Doc.29 computation with same weather data input for the same case.

The SAFT-program is currently, applied and further developed (SAFT2) in CSA-projects CIDER and ODESTA using aircraft noise measurements from the ULLA-project. It will also be used in TREVOL.

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Report SAFT (pdf 7.7 MB)

Project members

Belongs to: Centre for Sustainable Aviation
Last changed: Feb 02, 2022