1. Atmospheric air

1.1 Typical atmosphere composition

According to the International Civil Aviation Organization (ICAO), typical dry air is defined on the following basis:

• air is considered a perfect gas;

• it is free of water vapour;

• the physical constants are as follows :

  • molar mass M _a : 28.96455 · 10 ^–3 kg · mol ^–1 ,

  • atmospheric pressure at sea level: 101,325 Pa,

  • temperature at sea level: 15°C,

  • density at sea level:...