ISAtmosphere.jl

International Standard Atmospheric (ISA) model
Author rjdverbeek-tud
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Updated Last
2 Years Ago
Started In
November 2019

ISAtmosphere

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International Standard Atmospheric (ISA) model

Only metric units are used.

Functions

  • T_K Atmospheric temperature [K]

  • p_Pa Air pressure [Pa]

  • ρ_kg_m³ Air density [kg/m³]

  • a_m_s Speed of sound [m/s]

  • Vcas2Vtas True airspeed Vtas [m/s] as a function of the calibrated airspeed Vcas [m/s]

  • Vtas2Vcas Calibrated airspeed Vcas [m/s] as a function of the True airspeed Vtas [m/s]

  • M2Vtas True airspeed Vtas [m/s] as a function of the Mach number

  • Vtas2M Mach as a function of the True airspeed Vtas [m/s]

  • M2Vcas Calibrated airspeed Vcas [m/s] as a function of the Mach number

  • Vtas2M Mach as a function of the True airspeed Vtas [m/s]

  • Hp_trans_m Transition altitude [m]

  • conditions return Hp_m, T_K, p_Pa, ρ_kg_m³ and a_m_s in struct AtmosConditions

  • θ temperature ratio

  • δ pressure ratio

  • σ density ratio

Constants

  • T₀_K Standard atmospheric temperature [K] at Mean Sea Level (MSL)
  • p₀_Pa Standard atmospheric pressure [Pa] at Mean Sea Level (MSL)
  • ρ₀_kg_m³ Standard atmospheric density [kg/m³] at Mean Sea Level (MSL)
  • a₀_m_s Speed of sound [m/s] at Mean Sea Level (MSL)
  • g₀_m_s² Graviation acceleration [m/s²]
  • Hp_trop_m Geopotential pressure altitude [m] of Tropopause

Type

  • AtmosConditions: Hp_m, T_K, p_Pa, ρ_kg_m³, a_m_s

Source: EUROCONTROL BADA 4 User Manual Chapter 2.2 Atmosphere Model