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Introduction to the definition of weather by its physical parameters and stability class.

The method followed is that defined in the article:

Defrance, Jérôme & Salomons, Erik & Stuijt, Ingrid & Heimann, Dietrich & Plovsing, Birger & Watts, G.R & Jonasson, Hans & Zhang, Xuetao & Premat, Eric & Schmich-Yamane, Isabelle & Aballéa, François-Edern & Baulac, Marine & Roo, Foort. (2007). Outdoor Sound Propagation Reference Model Developed in the European Harmonoise Project. Acta Acustica united with Acustica. 93. 213-227.

 

To access it, you must select a propagation mode following the Harmonoise method (octave or third-octave) and specify that you wish to define the parameters yourself, as shown here:

 

How to specify wind direction:

 
We have chosen to define wind direction by the heading of its velocity vector.
Thus, a northerly wind has its velocity vector oriented along the y-axis or towards the south; its heading is therefore 180°, and the parameter expected by MithraSIG in this case is 180. 

Entering W. Dir of 0 therefore corresponds to a velocity vector pointing towards the north; it is therefore a southerly wind.
A westerly wind corresponds to a parameter of 90°, and an easterly wind to 270°.

Please Note:

Calculus can be longer than the one done iwith NMPB met