Atmosphere.Atmosphere — Module

International Standard Atmospheric (ISA) model

Only metric units are used.

Source: EUROCONTROL BADA 4 User Manual Chapter 2.2 Atmosphere Model

Atmosphere.T₀ — Constant

Standard atmospheric temperature [K] at Mean Sea Level (MSL)

Atmosphere.p₀ — Constant

Standard atmospheric pressure [Pa] at Mean Sea Level (MSL)

Atmosphere.ρ₀ — Constant

Standard atmospheric density [kg/m³] at Mean Sea Level (MSL)

Atmosphere.Hp_trans — Function

Hp_trans(Vcas::Float64, M::Float64, ΔT::Float64 = 0.0) Transition altitude (also called crossover altitude) [m] between a given calibrated airspeed [m/s] and a Mach number M and with temperature offset ΔT [K] EUROCONTROL BADA 4 User Manual eq. 2.2-27/28/29

Atmosphere.M2Vcas — Method

M2Vcas(M::Float64, p::Float64, T::Float64) Calibrated airspeed Vcas [m/s] as a function of the Mach number at pressure level p [Pa] and with temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-26

Atmosphere.M2Vtas — Method

M2Vtas(M::Float64, T::Float64) True airspeed Vtas [m/s] as a function of the Mach number and temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-26

Atmosphere.T — Function

T(Hp::Float64, ΔT::Float64 = 0.0) Atmospheric temperature [K] at pressure altitude Hp [m] and with temperature offset ΔT [K] EUROCONTROL BADA 4 User Manual eq. 2.2-13/16

Atmosphere.Vcas2M — Method

Vtas2M(Vtas::Float64, T::Float64) Mach as a function of the True airspeed Vtas [m/s] at pressure level p [Pa] and with temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-26 (reversed)

Atmosphere.Vcas2Vtas — Method

Vcas2Vtas(Vcas::Float64, p::Float64, T::Float64) True airspeed Vtas [m/s] as a function of the calibrated airspeed Vcas [m/s] at pressure level p [Pa] and with temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-23

Atmosphere.Vtas2M — Method

Vtas2M(Vtas::Float64, T::Float64) Mach as a function of the True airspeed Vtas [m/s] and temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-26 (reversed)

Atmosphere.Vtas2Vcas — Method

Vtas2Vcas(Vtas::Float64, p::Float64, T::Float64) Calibrated airspeed Vcas [m/s] as a function of the True airspeed Vtas [m/s] at pressure level p [Pa] and with temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-24

Atmosphere.a — Method

a(T::Float64) Speed of sound [m/s] at pressure level [Pa] and with temperature T [K] EUROCONTROL BADA 4 User Manual eq. 2.2-22

Atmosphere.p — Function

p(Hp::Float64, ΔT::Float64 = 0.0) Air pressure [Pa] at pressure altitude Hp [m] and with temperature offset ΔT [K] EUROCONTROL BADA 4 User Manual eq. 2.2-18/20

Atmosphere.ρ — Method

ρ(p, T) Air density [kg/m³] at pressure level [Pa] and Temperature [K] EUROCONTROL BADA 4 User Manual eq. 2.2-21

Atmosphere.R — Constant

Real gas constant for air [M²/(Ks²)]

Atmosphere.βT∇ — Constant

ISA temperature gradient [K/m] with altitude below the tropopause

Atmosphere.μ — Constant

constant used for Vtas<->Vcas conversion

Atmosphere.δ — Method

δ(p::Float64) pressure ratio EUROCONTROL BADA 4 User Manual eq. 2.2-31

Atmosphere.θ — Method

θ(T::Float64) temperature ratio EUROCONTROL BADA 4 User Manual eq. 2.2-30

Atmosphere.σ — Method

σ(ρ::Float64) density ratio EUROCONTROL BADA 4 User Manual eq. 2.2-32