Engee documentation

COESA Atmosphere Model

1976 COESA atmospheric model.

blockType: SubSystem

coesa atmosphere model

Path in the library:

/Aerospace/Environment/Atmosphere/COESA Atmosphere Model

Description

The COESA Atmosphere Model block defines the 1976 COESA (Committee on Extension to the Standard Atmosphere) US standard atmosphere model: generates temperature, pressure, density and sound speed values for a given geopotential altitude .

Up to 32000 m, the US Standard Atmosphere model corresponds to the ISA International Standard Atmosphere model.

The COESA Atmosphere Model unit operates in SI units.

Limitations

  • Below 0 m altitude and above 84852 m altitude, temperature values are calculated using linear extrapolation, pressure values are calculated using logarithmic extrapolation.

  • Density and speed of sound are calculated using the ideal gas equation.

Ports

Inlet

h (m) - geopotential height
scalar | vector

Geopotential height, m.

Data types: Float64.

Output

T (K) - temperature
scalar | vector

Temperature, K.

Data types: Float64.

a (m/s) - speed of sound
scalar | vector

Speed of sound, m/s.

Data types: Float64.

P (Pa) - pressure
scalar | vector

Pressure, Pa.

Data types: Float64.

ρ (kg/m3) - air density
scalar | vector

Density of air, kg/m³.

Data types: Float64.